Nissan Car 350Z & Maxima 1999-06

Timing Chain Cover, Chain, Sprockets, & Seal 1

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Removal & Installation



  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
     
    Engine cover
     
    Air cleaner case assembly
     
    Engine harnesses from timing chain case
     
    Upper and lower intake manifold collectors
     
    Cooling fan
     
    Drive belts
     
    A/C compressor and wire aside
     
    Power steering pump and wire aside
     
    Power steering pump bracket
     
    Alternator
     
    Water bypass hose, clamp and idler pulley bracket from timing chain case
     
    Intake valve timing control valve covers. 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-350Z 3.5L engine

     
    O-ring from timing chain case on both sides
     
    Both valve covers
     
    Rotate the crankshaft clockwise and set the No. 1 piston to TDC of the compression stroke

    Click image to see an enlarged view

    Fig. Set the No. 1 piston to Top Dead Center (TDC)-350Z 3.5L engine

     

  10.  
  11. Make sure the intake and exhaust camshaft lobes are facing toward the inside of the cylinder head
  12.  
  13. Remove the starter and lock the flywheel through the starter mounting hole.
  14.  
  15. Loosen the crankshaft pulley bolt.

    Crankshaft pulley using a suitable puller
     
    Upper and lower oil pans
     
    Front timing chain cover bolts in reverse order of the tightening sequence

    Click image to see an enlarged view

    Fig. Remove the front timing chain case mounting bolts in the reverse of the sequence shown-350Z 3.5L engine

     
    Front timing chain case
     
    O-rings from rear timing chain cover
     
    Water pump and chain tensioner cover from rear cover
     
    Pry out front oil seal
     
    Insert a suitable stopper pin for the left and right primary camshaft tensioners
     
    Primary chain tensioners
     
    Timing chain guide, slack guide and tension guide
     
    Primary timing chain and crankshaft sprocket
     
    Insert a suitable stopper pin for the left and right secondary camshaft tensioners
     
    Secondary chain tensioners
     
    Left and right intake camshaft sprocket bolts first, then exhaust sprocket bolts. Be sure to hold the flats of the camshafts while removing the sprocket bolts.
     
    Lower timing chain assembly with camshaft sprockets. Be sure to note the aligning marks of the chain before removal.
     

  16.  
  17. Remove the rear timing chain case bolts in the reverse order of the tightening sequence.
  18.  
  19. Remove the O-rings from the cylinder heads and block.

    All traces of liquid gasket from the front and timing chain case and from the water pump
     

  20.  
  21. Inspect the timing chain for excessive wear or damage and replace as necessary.

    Click image to see an enlarged view

    Fig. Timing chain alignment marks-350Z 3.5L engine



    Click image to see an enlarged view

    Fig. Rear timing chain case tightening sequence-350Z 3.5L engine

  22.  

To install:

  1. Install or connect the following:

    New O-rings to the cylinder heads and block
     
    Apply a bead of sealant to the back side of the rear timing chain case
     
    Install the rear timing chain case and tighten the bolts in sequence to 10 ft. lbs. (14 Nm). After tightening, retighten them again to 10 ft. lbs. (14 Nm).
     

  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.
  4.  
  5. Install the secondary timing chain and camshaft sprockets aligning the timing marks and timing chain links as shown.

    Click image to see an enlarged view

    Fig. Secondary timing chain alignment marks-350Z 3.5L engine

  6.  
  7. Tighten the camshaft sprocket bolts to 76 ft. lbs. (103 Nm).
  8.  
  9. Remove the pins from the secondary timing chain tensioners.
  10.  
  11. Install the primary timing chain tension guide.
  12.  
  13. Install the crankshaft sprocket with the mating marks on the front side.
  14.  
  15. Install the primary timing chain and so the mating marks are aligned as shown.
  16.  
  17. Install the internal chain guide and slack guide.
  18.  
  19. Install the primary timing chain tensioner and tighten the bolt to 72 inch lbs. (8 Nm). Remove the stopper pin

    Click image to see an enlarged view

    Fig. Primary timing chain alignment marks-350Z 3.5L engine

  20.  
  21. Double check that the mating marks on the timing chain and sprockets are in the correct locations.
  22.  
  23. Install new O-rings on the timing chain case.
  24.  
  25. Apply clean engine oil to the front oil seal and dust seal lips.
  26.  
  27. Use a drift and press fit the oil seal into the timing chain case.
  28.  
  29. Apply liquid gasket to the water pump and chain tensioner cover openings, then install the covers.
  30.  
  31. Apply liquid gasket to the back side of the timing chain case cover.
  32.  
  33. Install the dowel pin on the rear timing chain case into the dowel pin of the front timing chain case.
  34.  
  35. Install the front timing chain case and tighten the bolts in sequence to 19-23 ft. lbs. (26-31 Nm for M8 bolts and 9-10 ft. lbs. (12-14 Nm for M6 bolts. After tightening, retighten them again to the same specification.
  36.  
  37. Install seal rings in the timing control cover shaft grooves and apply liquid gasket to the covers.
  38.  
  39. Install new O-rings in the timing chain case oil holes.
  40.  
  41. Install the timing control covers and tighten the bolt in sequence to 72 inch lbs. (8 Nm).

    Click image to see an enlarged view

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

  42.  
  43. Install or connect the following:

    Upper and lower oil pans
     
    Valve covers
     
    Crankshaft pulley and tighten the bolt to 29-36 ft. lbs. (40-49 Nm), plus an additional 60°.
     

  44.  
  45. The remainder of the installation is the reverse of the removal procedure.
  46.  
  47. Fill the cooling system.
  48.  
  49. Fill the engine with clean oil.
  50.  
  51. Start the vehicle, check for leaks and repair if necessary.
  52.  

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.  

2.5L 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.  

 
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