Nissan Car 350Z & Maxima 1999-06

Timing Chain Cover & Seal

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Removal & Installation



2.4L Engine
  1. Before servicing the vehicle, refer to the Precautions 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 No. 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
     
    Distributor
     

  8.  
  9. Using a block of wood, set a transmission jack under the aluminum oil pan and remove the front engine mounting.

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

  10.  


NOTE
The stoppers on camshaft covers prevent the upper timing chain from disengaging from the idle sprocket.



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


NOTE
These parts must be reassembled in their original positions.



Cylinder head bolts in the reverse order of installation
 


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.



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.
 


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.



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

  1. Install a seal cutter between the steel oil pan and the aluminum oil pan.
  2.  
  3. 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.
  4.  
  5. Remove or disconnect the following:

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

  6.  
  7. Support the transaxle with a jack and the engine with a engine hoist.

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

  8.  
  9. Insert a seal cutter between the oil pan and the cylinder block.
  10.  
  11. 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.

    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
     

  12.  

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.

    Chain tension arm and chain guide
     
    Lower timing chain tensioner
     

  4.  
  5. Apply a continuous bead of liquid gasket to the front cover and install the front cover. Install a new oil seal.

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

  6.  
  7. 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.

    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
     

  8.  
  9. Set the upper timing chain on idler sprockets, aligning the mating marks.

    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.
     

  10.  
  11. 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
     

  12.  
  13. Fill the cooling system.
  14.  
  15. Fill the engine with clean oil.
  16.  
  17. Start the vehicle, check for leaks and repair if necessary.
  18.  


    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


 
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