Nissan Car Altima & Sentra 1999-06

Timing Chain Cover, Chain, Sprockets, & Seal 1

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Removal & Installation



1.6L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Upper radiator hose
     
    Engine drive belts
     
    Power steering pulley and the pump with bracket
     
    Air duct from the intake manifold collector
     
    Right front wheel and engine side covers
     
    Engine undercovers
     
    Front exhaust pipe
     
    Cylinder head front mounting bracket
     
    Cylinder head cover from the engine
     
    Rocker cover
     
    Distributor cap
     
    Spark plugs
     
    Intake manifold support and set the No. 1 piston at the Top Dead Center (TDC) compression stroke
     
    Distributor
     
    Cylinder head front cover
     
    Water pump pulley
     
    Thermostat housing
     
    Lower timing chain tensioner
     
    Upper timing chain tensioner and slack side timing chain guide
     
    Idler sprocket bolt
     
    Camshaft sprocket bolts and the sprockets from the camshafts. Be sure to mark the sprockets for proper reinstallation
     
    Camshaft mounting caps by loosening the bolts in 2 or 3 steps
     
    Camshafts from the engine
     
    Idler sprocket bolt
     
    Cylinder head with the manifolds
     
    Idler sprocket shaft from the rear side
     
    Upper timing chain and support the engine assembly
     
    Center crossmember
     
    Oil pan and strainer assembly
     
    Crankshaft pulley
     
    Engine front mount and bracket
     
    Bolts that secure the front timing cover and the cover from the engine. Once the timing chain cover is removed, drive out the old oil seal.
     
    Idler sprocket and the lower timing chain
     
    Oil pump drive spacer and the crankshaft sprocket
     

  8.  
  9. Remove the timing chain guide.
  10.  

To install:

  1. Drive a new oil seal into the front cover. Lubricate the oil seal lip with clean engine oil.
  2.  
  3. Confirm that No. 1 piston is set at Top Dead Center (TDC) on compression stroke.
  4.  
  5. Install or connect the following:
    NOTE
    The number of links between the alignment marks are the same for the left and the right side.



    Crankshaft sprocket with the marks of the sprocket facing the front of the engine
     
    Oil pump drive spacer and the chain guide
     
    Lower timing chain. Set the chain by aligning its mating mark with the one on the crankshaft sprocket. Be sure the sprocket's mating mark faces the front of the engine.

    Click image to see an enlarged view

    Fig. Be sure to align the camshaft sprockets with the timing chain-1.6L engine

     



    Crankshaft sprocket and the lower timing chain. Set the timing chain by aligning its mating mark with the one on the crankshaft sprocket. Be sure sprocket's mating mark faces engine front.
     
    Front cover assembly, using liquid gasket
     
    Engine front mounting bracket and the engine mount
     
    Oil strainer, oil pan assembly and the crankshaft pulley
     
    Center crossmember
     

  6.  
  7. Set the idler sprocket by aligning the mating mark on the larger sprocket with the silver mating mark on the lower timing chain.
  8.  
  9. Install or connect the following:

    Upper timing chain and set it by aligning the mating mark on the smaller sprocket with the silver mating marks on the upper timing chain. Be sure sprocket marks face engine front.
     
    Idler sprocket shaft to the rear side
     
    Cylinder head assembly
     
    Idler sprocket bolt. Be sure to lubricate the bolt with clean engine oil
     
    Exhaust and intake camshafts. The camshafts and marked I for intake and E for exhaust
     

  10.  
  11. Position the intake camshaft knock pin at the 9 o'clock position and the exhaust camshaft knock pin at the 12 o'clock position.

    Click image to see an enlarged view

    Fig. Positioning of camshaft knock pins during assembly-1.6L engine

  12.  
  13. Install or connect the following:

    Camshaft bearing caps and distributor bracket. Apply liquid sealant to the distributor bracket.
     

  14.  
  15. Torque the mounting bolts in sequence as follows:
    1. Bolts 11-15, then bolts 1-10: 18 inch lbs. (2.0 Nm).
    2.  
    3. Bolts 1-15: 52 inch lbs. (6 Nm).
    4.  
    5. Bolts 1-14: 104 inch lbs. (12 Nm).
    6.  
    7. Bolt 15: 73 inch lbs. (8 Nm).
    8.  

  16.  
  17. Install or connect the following:

    Camshaft sprockets with timing chain. Set the camshaft sprockets by aligning the mating marks of the timing chain with the marks on the camshaft sprockets.
     
    Camshaft sprocket bolts. Torque the bolts to 86 ft. lbs. (117 Nm). Be sure to lubricate the bolts with clean engine oil
     
    Upper timing chain tensioner. Before installation of the tensioner, install a suitable pin to hold the tensioner in the relaxed position. After installing the chain tensioner, remove the pin
     
    Lower timing chain tensioner. Be sure the notch of the gasket is positioned down
     
    Thermostat housing
     
    Water pump pulley
     
    Cylinder head front cover
     
    Distributor
     
    Intake manifold support
     
    Spark plugs and leads
     
    Distributor cap
     
    Rocker cover
     
    Cylinder head cover
     
    Front exhaust pipe
     
    Engine under covers
     
    Engine side covers and the right front wheel
     
    Air duct to the intake manifold collector
     
    Power steering pulley and oil pump
     
    Drive belts
     
    Upper radiator hose
     
    Negative battery cable
     

  18.  
  19. Fill the cooling system.
  20.  
  21. Start the vehicle, check for leaks and repair if necessary.
  22.  

2.0L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Radiator
     
    Right front wheel and engine side cover
     
    Spark plugs and rotate the engine and position the No. 1 cylinder to Top Dead Center (TDC)
     
    Air duct to the intake manifold
     
    Drive belts and the water pump pulley
     


    Click image to see an enlarged view

    Fig. Timing chain tensioner-2.0L engines

    Alternator and the power steering pump from the engine
     
    Vacuum hoses, fuel hoses and the wiring harness connectors
     
    Cylinder head cover
     
    Intake manifold supports
     
    Oil filter bracket and the power steering pump bracket
     
    Timing chain tensioner
     
    Distributor
     
    Timing chain guide and holding the flats of the camshaft sprockets, remove the bolts that secure the sprockets
     
    Timing chain sprockets from the camshafts
     
    Oil tubes, baffle plate and camshaft brackets
     
    Camshafts from the cylinder head
     
    Starter motor
     
    Coolant hoses from the engine block
     
    Knock sensor (KS) harness connector
     
    Exhaust Gas Recirculation (EGR) tube
     
    Cylinder head
     
    Oil pan, oil strainer and the baffle plate
     
    Crankshaft pulley using a suitable puller
     
    Engine front mount
     
    Front cover and oil pump drive spacer
     
    Timing chain guides and timing chain. Check the timing chain for excessive wear at the roller links.
     

  8.  

To install:

  1. Clean all gasket mating surfaces.
  2.  
  3. Install or connect the following:

    Crankshaft sprocket. Position the crankshaft so that No. 1 piston is set at TDC (keyway at 12 o'clock, mating mark at 4 o'clock) fit timing chain to crankshaft sprocket so the mating mark is in line with mating mark on crankshaft sprocket. The mating marks on timing chain for the camshaft sprockets should be silver. The mating mark on the timing chain for the crankshaft sprocket should be gold.
     
    Timing chain to the crankshaft sprocket and install the timing chain guides. Tighten the timing chain guides to 10-14 ft. lbs. (13-19 Nm). Drape the timing chain over the left chain guide.
     


    Click image to see an enlarged view

    Fig. Timing chain sprocket alignment marks-2.0L engines

    Oil pump drive spacer to the crankshaft
     

  4.  
  5. Apply a continuous bead of liquid sealant to the front timing cover and install the cover. Tighten the front cover mounting bolts to 57-66 inch lbs. (6.4-7.5 Nm).

    Right front engine mount
     
    Crankshaft pulley and torque the bolt to 105-112 ft. lbs. (142-152 Nm). Be sure the No. 1 piston is at TDC.
     
    Oil strainer, baffle plate and the oil pan assembly
     
    Cylinder head assembly. Be sure to apply a bead of sealant to the joint of the block and front timing cover.
     
    EGR tube
     
    KS harness connector
     
    Coolant hoses to the engine block, using new hose clamps
     
    Starter motor
     
    Camshafts, camshaft bearing caps, oil tubes and the baffle plate
     

  6.  


NOTE
When installing the camshafts, be sure to position the left-hand and right-hand camshaft keys at 12 o'clock. Also be sure the camshaft brackets are facing in the correct direction.



Camshaft sprockets by lining up the mating marks on the timing chain with the mating marks on the camshaft sprockets and torque the bolts to 101-116 ft. lbs. (137-157 Nm)
 
Timing chain guide and distributor
 
Chain tensioner. Press the cam stopper down and the press-in sleeve until the hook can be engaged on the pin. When tensioner is bolted in position the hook will release automatically.
 


NOTE
Ensure the arrow on the outside of the tensioner faces the front of the engine.



Oil filter bracket and power steering pump bracket
 
Intake manifold supports
 
Cylinder head cover
 
Vacuum hoses and fuel lines
 
Alternator and power steering pump
 
Water pump pulley and drive belts
 
Air duct
 
Spark plugs after making certain that the No. 1 piston is at the TDC position
 
Engine side cover and right front wheel
 
Radiator
 
Negative battery cable
 

  1. Fill the cooling system.
  2.  
  3. Start the engine, check for leaks and repair if necessary.
  4.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Radiator
     
    Right front wheel and engine side cover
     
    Spark plugs and rotate the engine and position the No. 1 cylinder to Top Dead Center (TDC).
     
    Air duct to the intake manifold
     
    Drive belts and the water pump pulley

    Click image to see an enlarged view

    Fig. Timing chain tensioner-2.0L engines

     
    Alternator and the power steering pump from the engine
     
    Vacuum hoses, fuel hoses and the wiring harness connectors
     
    Cylinder head cover
     
    Intake manifold supports
     
    Oil filter bracket and the power steering pump bracket
     
    Timing chain tensioner
     
    Distributor
     
    Timing chain guide and holding the flats of the camshaft sprockets, remove the bolts that secure the sprockets
     
    Timing chain sprockets from the camshafts
     
    Oil tubes, baffle plate and camshaft brackets
     
    Camshafts from the cylinder head
     
    Starter motor
     
    Coolant hoses from the engine block
     
    Knock sensor (KS) harness connector
     
    Exhaust Gas Recirculation (EGR) tube
     
    Cylinder head
     
    Oil pan, oil strainer and the baffle plate
     
    Crankshaft pulley using a suitable puller
     
    Engine front mount
     
    Front cover and oil pump drive spacer
     
    Timing chain guides and timing chain. Check the timing chain for excessive wear at the roller links
     

  8.  

To install:

  1. Clean all gasket mating surfaces.
  2.  
  3. Install or connect the following:

    Crankshaft sprocket. Position the crankshaft so that No. 1 piston is set at TDC (keyway at 12 o'clock, mating mark at 4 o'clock) fit timing chain to crankshaft sprocket so the mating mark is in line with mating mark on crankshaft sprocket. The mating marks on timing chain for the camshaft sprockets should be silver. The mating mark on the timing chain for the crankshaft sprocket should be gold
     
    Timing chain to the crankshaft sprocket and install the timing chain guides. Tighten the timing chain guides to 10-14 ft. lbs. (13-19 Nm). Drape the timing chain over the left chain guide

    Click image to see an enlarged view

    Fig. Timing chain sprocket alignment marks-2.0L (SR20DE) engines

     
    Oil pump drive spacer to the crankshaft
     

  4.  
  5. Apply a continuous bead of liquid sealant to the front timing cover and install the cover. Tighten the front cover mounting bolts to 57-66 inch lbs. (6.4-7.5 Nm).
  6.  
  7. Install or connect the following:
    NOTE
    When installing the camshafts, be sure to position the left-hand and right-hand camshaft keys at 12 o'clock. Also be sure the camshaft brackets are facing in the correct direction.


    NOTE
    Ensure the arrow on the outside of the tensioner faces the front of the engine.



    Right front engine mount
     
    Crankshaft pulley and torque the bolt to 105-112 ft. lbs. (142-152 Nm). Be sure the No. 1 piston is at TDC
     
    Oil strainer, baffle plate and the oil pan assembly
     
    Cylinder head assembly. Be sure to apply a bead of sealant to the joint of the block and front timing cover
     
    EGR tube
     
    KS harness connector
     
    Coolant hoses to the engine block, using new hose clamps
     
    Starter motor
     
    Camshafts, camshaft bearing caps, oil tubes and the baffle plate
     



    Camshaft sprockets by lining up the mating marks on the timing chain with the mating marks on the camshaft sprockets and torque the bolts to 101-116 ft. lbs. (137-157 Nm)
     
    Timing chain guide and distributor
     
    Chain tensioner. Press the cam stopper down and the press-in sleeve until the hook can be engaged on the pin. When tensioner is bolted in position the hook will release automatically
     



    Oil filter bracket and power steering pump bracket
     
    Intake manifold supports
     
    Cylinder head cover
     
    Vacuum hoses and fuel lines
     
    Alternator and power steering pump
     
    Water pump pulley and drive belts
     
    Air duct
     
    Spark plugs after making certain that the No. 1 piston is at the TDC position
     
    Engine side cover and right front wheel
     
    Radiator
     
    Negative battery cable
     

  8.  
  9. Fill the cooling system.
  10.  
  11. Start the engine, check for leaks and repair if necessary.
  12.  

2.4L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Drain the engine oil.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Spark plug wires and set the N0. 1 piston at the Top Dead Center (TDC) of the compression stroke
     
    Engine undercover
     
    Vacuum hoses, fuel hoses, wires, harness and connectors
     
    Drive belts
     
    Power steering reservoir
     
    Alternator and bracket, the upper radiator hose, the air duct and the front exhaust tube
     
    Intake manifold collector supports, intake manifold collector and the exhaust manifold
     

  8.  
  9. Set the No. 1 piston at Top Dead Center (TDC) on its compression stroke.
  10.  
  11. Remove or disconnect the following:

    Distributor
     

  12.  
  13. Using a block of wood, set a transmission jack under the aluminum oil pan and remove the front engine mounting.
  14.  
  15. Remove or disconnect the following:
    NOTE
    The stoppers on camshaft covers prevent the upper timing chain from disengaging from the idle sprocket.


    NOTE
    These parts must be reassembled in their original positions.


    NOTE
    A warped or cracked cylinder head could result from loosening in incorrect order. The cylinder head bolts should be loosened in 2 or 3 steps.


    NOTE
    The cast portion of the front cover is located on the lower side of the crankshaft sprocket, so the lower timing chain need not be disengaged from idler sprocket.



    Rocker cover. Remove the rocker cover bolts in the proper sequence
     
    Camshaft sprockets
     



    Cam bearing caps in sequence
     
    Camshafts. The camshaft brackets must be loosened in reverse order of tightening to prevent damage to the camshaft
     



    Cylinder head bolts in the reverse order of installation
     



    Cam sprocket cover
     
    Upper chain tensioner and upper chain guides
     
    Upper timing chain
     
    Idler sprocket bolt
     
    Cylinder head and the intake manifold
     
    Cylinder head gasket. The lower timing chain will not be disengaged from crankshaft sprocket
     



    Steel oil pan bolts in the reverse sequence of the tightening procedure
     

  16.  
  17. Install a seal cutter between the steel oil pan and the aluminum oil pan.
  18.  
  19. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Take care not to damage the aluminum oil pan.
  20.  
  21. Remove or disconnect the following:

    Steel oil pan
     
    Baffle plate, oil strainer and the front tube
     

  22.  
  23. Support the transaxle with a jack and the engine with a engine hoist.
  24.  
  25. Remove or disconnect the following:

    Front suspension member
     
    A/C compressor gussets
     
    Rear cover plate
     
    Aluminum oil pan retaining bolts in sequence
     

  26.  
  27. Insert a seal cutter between the oil pan and the cylinder block.
  28.  
  29. Tapping the cutter with a hammer, slide it around the entire edge of the oil pan. Take care not to damage the aluminum oil pan.
  30.  
  31. Remove or disconnect the following:

    Oil pan from the engine
     
    Crankshaft pulley
     
    Front timing chain cover
     
    Oil pump drive spacer
     
    Lower timing chain tensioner, tensioner arm and lower timing chain guide
     
    Lower timing chain and idler sprocket
     

  32.  

To install:

  1. Install or connect the following:

    Crankshaft sprocket and oil pump drive spacer
     
    Idler sprocket and lower timing chain
     

  2.  
  3. Set the lower timing chain on the sprockets, aligning the mating marks. The mating marks on the timing chain assembly will be silver.
  4.  
  5. Install or connect the following:

    Chain tension arm and chain guide
     
    Lower timing chain tensioner
     

  6.  
  7. Apply a continuous bead of liquid gasket to the front cover and install the front cover. Install a new oil seal.
  8.  
  9. Install or connect the following:

    Crankshaft pulley and torque tighten bolt to 105-112 ft. lbs. (142-152 Nm)
     

  10.  
  11. Carefully scrape the old gasket material away from the pan and cylinder block mounting surfaces, then apply a continuous 3.5-4.5mm wide bead of liquid gasket around the oil pan and the cylinder block.
  12.  
  13. Install or connect the following:

    Aluminum oil pan and torque the bolts, in sequence, to 13 ft. lbs. (17.5 Nm)
     
    Baffle plate, oil strainer and the front tube
     
    Steel oil pan and torque the bolts, in sequence, to 61 inch lbs. (7 Nm)
     
    Rear cover plate
     
    A/C compressor gussets
     
    Front suspension member
     
    Front engine mounting and remove the engine hoist and transaxle support
     
    New cylinder head gasket
     
    Cylinder head and temporarily tighten the cylinder head bolts when installing the front cover. This is necessary to avoid damaging the cylinder head gasket. Be sure to install washers between the bolts and cylinder head
     
    Upper timing chain, chain tensioner and chain guide
     

  14.  
  15. Set the upper timing chain on idler sprockets, aligning the mating marks.
  16.  
  17. Install or connect the following:

    Cam sprocket cover. Apply a continuous bead of liquid gasket to front cover. Be careful not to damage the cylinder head gasket. Be careful that the upper timing chain does not slip or jump when installing cam sprocket cover
     

  18.  
  19. Tighten cylinder head bolts.

    Camshafts and camshaft bearing caps
     
    Camshaft sprockets, then torque the sprocket bolts to 123-130 ft. lbs. (167-176 Nm). Install the chain guide between both camshaft sprockets. The alignment marks on the upper portion of the timing chain should now be aligned
     
    Rocker cover
     
    Distributor
     
    Intake manifold collector supports and collector
     
    Exhaust manifold
     
    Alternator and bracket
     
    Upper radiator hose
     
    Air duct assembly
     
    Front exhaust tube
     
    Power steering reservoir
     
    Drive belts
     
    Vacuum hoses and fuel lines
     
    Engine under cover
     
    Spark plug wires
     
    Negative battery cable
     

  20.  
  21. Fill the cooling system.
  22.  
  23. Fill the engine with clean oil.
  24.  
  25. Start the vehicle, check for leaks and repair if necessary.

    Click image to see an enlarged view

    Fig. Be sure to align the mark on the idler sprocket with the mark on the upper chain-2.4L engines



    Click image to see an enlarged view

    Fig. Align the marks on the camshaft sprockets with the upper portion of the upper timing chain and mating marks-2.4L engine



    Click image to see an enlarged view

    Fig. Lower timing chain alignment marks-2.4L engine

  26.  

2.5L Engine


Click image to see an enlarged view

Fig. Exploded view of the timing chain assembly-2.5L engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Drain the cooling system.
  6.  
  7. Relieve the fuel system pressure.
  8.  
  9. Disconnect the negative battery cable. Support the engine and transaxle with suitable tools.
  10.  
  11. On Altima, remove or disconnect the following:

    Engine under cover
     
    Upper and lower oil pans
     
    Alternator
     
    Engine cover
     
    Variable timing control solenoid conector
     
    Engine ground
     
    Coolant reservoir tank
     
    Right side fuse and relay box and move aside
     
    Right engine mount and bracket
     

  12.  
  13. On Sentra, remove or disconnect the following:

    Air cleaner and duct
     
    Spark plugs
     
    Valve cover
     
    Coolant reservoir tank
     
    Auxiliary drive belt tensioner
     
    Alternator
     
    Strut tower cross brace
     
    A/C compressor and wire aside
     
    Power steering pump and reservoir and wire aside
     
    Upper and lower oil pans
     

  14.  
  15. On all models, remove or disconnect the following:

    Intake valve timing control cover in reverse of the tightening sequence
     
    Timing chain guide between the camshaft sprockets and through the front cover
     
    Rotate the crankshaft clockwise and set the No. 1 piston to TDC of the compression stroke
     
    Crankshaft pulley using a suitable puller
     
    Front timing chain cover bolts in reverse order of the tightening sequence
     


    Click image to see an enlarged view

    Fig. Timing chain cover bolt removal sequence shown-2.5L engine

    Front timing chain case
     
    Insert a suitable stopper pin in the timing chain tensioner
     
    Chain tensioner
     

  16.  
  17. While holding the camshaft with an open end wrench on the camshaft flat, remove the camshaft sprocket bolts and remove the camshaft sprockets.
  18.  
  19. Remove the timing chain slack guide, tension guide, timing chain and oil pump drive spacer.
  20.  
  21. Lift up on the timing chain tensioner lever for the balancer and release the ratchet.
  22.  
  23. Push the tensioner sleeve in and hold.
  24.  
  25. Insert a stopper pin to secure the tensioner sleeve
  26.  
  27. Remove the balancer tensioner.
  28.  
  29. Remove the timing chain for the balancer unit.
  30.  
  31. Remove the balancer unit using the sequence shown.
  32.  


    Click image to see an enlarged view

    Fig. Balancer unit mounting bolts removal sequence shown-2.5L engine



    Click image to see an enlarged view

    Fig. Balancer unit mounting bolts tightening sequence shown-2.5L engine



    Click image to see an enlarged view

    Fig. Balancer timing chain alignment marks-2.5L engine



    Click image to see an enlarged view

    Fig. Timing chain alignment marks-2.5L engine



    Click image to see an enlarged view

    Fig. Timing chain cover bolt removal sequence shown-2.5L engine



    Click image to see an enlarged view

    Fig. Intake valve timing control cover tightening sequence shown-2.5L engine


To install:

  1. If replacement of the balancer bolts is not possible, perform the following bolt measurement:
    1. Measure the diameter of the head bolt 0.39 in. (10mm) from the bottom of the bolt.
    2.  
    3. Measure the diameter of the head bolt 2.75 in. (70mm) from the bottom of the bolt.
    4.  
    5. Whenever the size difference between the 2 measurements exceeds 0.0059 in. (0.15mm) the head bolts must be replaced.
    6.  

  2.  
  3. Apply clean engine oil to the bolt threads and seating surfaces and tighten the balancer bolts in sequence as follows:
    1. Step 1: 35 ft. lbs. (47 Nm).
    2.  
    3. Step 2: Plus 90 degrees clockwise
    4.  
    5. Step 3: Loosen all the bolts completely.
    6.  
    7. Step 2: 29 ft. lbs. (33 Nm).
    8.  
    9. Step 4: 35 ft. lbs. (47 Nm).
    10.  
    11. Step 5: Plus 90 degrees clockwise
    12.  

  4.  
  5. Install the crankshaft sprocket and balancer timing chain and align the marks as shown.
  6.  
  7. Install the balancer timing chain tensioner and remove the stopper pin.
  8.  
  9. Install the timing chain and and align the timing marks as shown.
  10.  
  11. Install the timing chain tensioner and remove the stopper pin.
  12.  
  13. Using adrift, install a new oil seal in the front cover.
  14.  
  15. Install new O-rings into the cylinder head and block.
  16.  
  17. Apply a bead of sealant around the inside of the front cover sealing surface.
  18.  
  19. Install the front cover and tighten the bolts in the sequence shown.
  20.  
  21. Install the chain guide between camshaft sprockets.
  22.  
  23. Install the intake valve timing control cover in the sequence shown and tighten the bolts to 10 ft. lbs. (13 Nm).
  24.  
  25. Install the crankshaft pulley and tighten the bolt to 31 ft. lbs. (42 Nm), plus an additional 60°.
  26.  
  27. The remainder of the installation is the reverse of the removal procedure.
  28.  

3.0L & 3.5L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the engine oil.
  4.  
  5. Drain the cooling system.
  6.  
  7. Relieve the fuel system pressure.
  8.  
  9. Remove or disconnect the following:

    Negative battery cable
     
    Left side rocker cover ornament
     

  10.  


NOTE
Before detaching any hoses or connectors, note the locations for reassembly.



Air duct to intake manifold hose, collector hose, blow-by hose and vacuum hoses
 
Fuel hoses and detach the harness connections
 
Canister purge hoses
 
Water hoses from the cylinder head and intake manifold
 
All 6 ignition coils from the spark plugs
 
Spark plugs
 
Bolts that secure the Exhaust Gas Recirculation (EGR) tube and remove the tube
 
Intake manifold collector supports and the collector
 
Fuel tube assembly
 
Intake manifold. Loosen the bolts in the reverse sequence of the tightening procedure.
 
Left-hand and right-hand intake valve timing control solenoid valves, 3.5L engine only
 
Left-hand and right-hand rocker covers from the cylinder head
 
Engine undercovers
 
Right front wheel and the engine side covers
 
Drive belts and the idler pulley
 
Power steering oil pump belt and the power steering oil pump assembly
 
Camshaft Position (CMP) sensor (PHASE) and Crankshaft Position (CKP) sensors (REF)/(POS)
 

  1. Set the No. 1 piston to Top Dead Center (TDC) of compression stroke by rotating the crankshaft.
  2.  
  3. Loosen the crankshaft pulley bolt while securing the ring gear so the crankshaft cannot rotate.

    Ring gear cover access plate
     

  4.  


    Click image to see an enlarged view

    Fig. Set the No. 1 piston to Top Dead Center (TDC)-3.0L and 3.5L engines



NOTE
Use care not to damage the ring gear teeth.



Crankshaft pulley using a suitable puller
 
Intake valve timing control valve cover, 3.5L engine only. Loosen the bolts in the reverse order shown in the accompanying figure. In the cover, the shaft is engaged with the center hole of the intake camshaft sprocket. Remove it straight out until the engagement comes off.
 


Click image to see an enlarged view

Fig. Loosen the intake valve timing control valve cover bolts in the reverse of the order shown-3.5L engine

A/C compressor and bracket
 
Front exhaust pipe and its support
 

  1. Hang the engine at the right and left side engine slingers with a suitable hoist.
  2.  
  3. Support the transaxle with jack.

    Right side engine mounting and bracket
     
    Center crossmember assembly
     
    Upper and lower oil pans
     
    Water pump cover
     
    Bolts that secure the front timing chain case, in sequence
     


    Click image to see an enlarged view

    Fig. Remove the front timing chain case mounting bolts in the sequence shown-3.0L engines



    Click image to see an enlarged view

    Fig. Remove the front timing chain case mounting bolts in the reverse of the sequence shown-3.5L engines

    Timing chain case cover using a seal cutter
     
    Internal timing chain guide and the upper chain guide
     
    Timing chain tensioner and slack side chain guide
     
    Left and right intake camshaft sprockets first. Be sure to hold the flats of the camshafts while removing the sprocket bolts.
     
    Lower timing chain assembly. Be sure to note the aligning marks of the chain before removal.
     

  4.  
  5. Insert a suitable stopper pin for the left and right camshaft tensioners.

    Left and right exhaust camshaft sprocket bolts. Be sure to hold the flats of the camshafts while removing the sprocket bolts.
     
    Upper timing chain assembly. Be sure to note the aligning marks of the chain before removal.
     
    Lower timing chain guide
     
    Crankshaft sprocket
     
    All traces of liquid gasket from the front timing chain case and from the water pump
     

  6.  
  7. Inspect the timing chain for excessive wear or damage and replace as necessary.
  8.  


    Click image to see an enlarged view

    Fig. Crankshaft sprocket with mating marks-3.0L engine



    Click image to see an enlarged view

    Fig. Hold the camshaft with a wrench while removing the sprocket bolts-3.0L and 3.5L engines



    Click image to see an enlarged view

    Fig. Timing chain alignment marks-3.0L and 3.5L engines


To install:

  1. Install or connect the following:

    Crankshaft sprocket with the mating mark facing out
     

  2.  
  3. Position the crankshaft to TDC of compression stroke and align the dowels of the camshaft sprockets to the 12 o'clock position in respect to the cylinder head.

    Lower timing chain guide. The front mark on the guide should face upwards.
     

  4.  
  5. On a work bench, align the marks on the intake and exhaust camshaft sprockets with the marks of the chain.

    Exhaust camshaft sprockets onto the dowel pin and torque the mounting bolts to 88-95 ft. lbs. (119-128 Nm). Be sure to secure the camshafts while tightening the bolts.
     
    Timing chains and sprockets to the intake camshafts. Be sure to align the timing chain and sprocket mating marks.
     
    Left and right camshaft tensioner stopper pins
     

  6.  
  7. Align the mating mark on the crankshaft with the matchmark (gold link) on the lower timing chain.
  8.  
  9. Install the lower timing chain to the water pump sprocket.
  10.  
  11. Working counterclockwise, install the lower timing chain camshaft sprockets. Be sure to align the sprocket marks with the blue links of the timing chain during installation.
  12.  
  13. Install or connect the following:

    Intake sprocket and torque the bolts to 88-95 ft. lbs. (119-128 Nm). Be sure to secure the camshafts while tightening the bolts.
     
    Internal timing chain guide, upper timing chain guide, lower timing chain tensioner and slack side timing chain guide
     

  14.  
  15. Torque the tensioner mounting bolt to 75-96 inch lbs. (8.4-10.8 Nm) and the guide bolts to 108-168 inch lbs. (13-19 Nm).
  16.  
  17. Apply a 0.102-0.142 in. (2.6-3.6mm) continuous bead of liquid gasket to all necessary areas as shown on the front timing cover.

    Timing cover evenly and gently. Be sure to align the dowel pin holes.
     

  18.  
  19. Torque the mounting bolts in sequence as follows:
    1. Bolts No. 1 and 2: 19-23 ft. lbs. (26-31 Nm).
    2.  
    3. Bolts No. 3-20: 105-121 inch lbs. (11.8-13.7 Nm).
    4.  

  20.  


    Click image to see an enlarged view

    Fig. Application of liquid gasket to the front timing case-3.0L and 3.5L engines



    Click image to see an enlarged view

    Fig. Tighten the front timing chain case bolts according to the sequence shown-3.0L engines



    Click image to see an enlarged view

    Fig. Tighten the front timing chain case bolts according to the sequence shown-3.5L engines



NOTE
Leave the bolts unattended for 30 minutes or more after tightening. This will allow the liquid gasket to cure sufficiently.

  1. Apply a 0.091-0.130 in. (2.3-3.3mm) continuous bead of liquid gasket to the water pump cover and install the cover. Torque the bolts to 84-108 inch lbs. (10-13 Nm).
  2.  
  3. Install or connect the following:

    Oil pans
     
    Center crossmember
     
    Right side engine mount and bracket
     
    Front exhaust pipe and remove the transaxle support
     
    A/C compressor and bracket
     
    Crankshaft pulley
     
    Ring gear access cover plate
     
    CMP sensor and CKP sensors
     
    Power steering pump
     
    Idler pulley and drive belts
     
    Engine side cover and right front wheel
     
    Engine under covers
     
    Intake valve timing control solenoid valves with new covers, 3.5L engine only. Tighten the cover bolts in the proper sequence.
     


    Click image to see an enlarged view

    Fig. Tighten the intake valve timing control valve cover bolts in sequence-3.5L engine

    Rocker covers
     
    Intake manifold
     
    Fuel tube assembly
     
    Intake manifold collector and support
     
    EGR tube
     
    Spark plugs and ignition coils
     
    Coolant hoses
     
    Fuel hoses
     
    Air duct assembly and hoses
     
    Left side rocker cover ornament
     
    Negative battery cable
     

  4.  
  5. Fill the cooling system.
  6.  
  7. Fill the engine with clean oil.
  8.  
  9. Start the vehicle, check for leaks and repair if necessary.
  10.  

 
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