Nissan Z - ZX 1970-1988 Repair Guide

Rear Main Oil Seal

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REMOVAL & INSTALLATION



Except VG Engines

See Figures 1, 2, 3, 4 and 5

  1. Refer to the Engine removal and installation procedures in this section, and remove the engine with the transmission from the vehicle.
  2.  
  3. Separate the transmission from the engine.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Remove the rear main bearing cap with a puller



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Fig. Fig. 2: Remove the rear main seal

  1. Remove the clutch assembly from the flywheel (manual transmission) or the torque converter from the drive plate (automatic transmission).
  2.  
  3. Remove the flywheel or the drive plate from the crankshaft, then secure the engine to a workstand.
  4.  
  5. If not having done so, drain the crankcase, then remove the oil pan.
  6.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the rear main bearing cap using the special tool No. KV101041S0. Remove the bearing cap side seals.
  2.  
  3. Remove the rear main oil seal from around the crankshaft.
  4.  
  5. Using a putty knife, clean the gasket mounting surfaces.
  6.  
  7. Apply oil to the sealing lip of the new oil seal and install it around the crankshaft, using the Oil Seal Installation tool No. KV10105500 or ST15310000.
  8.  



Click image to see an enlarged view

Fig. Fig. 3: Installing the rear main seal



Click image to see an enlarged view

Fig. Fig. 4: Correct application of sealer to the rear main bearing cap



Click image to see an enlarged view

Fig. Fig. 5: Install the rear bearing cap side seals

  1. Apply sealer to the rear main bearing cap as indicated in the illustration. Install the cap and tighten the bolts evenly in three stages to 33-40 ft. lbs. (43-40 Nm)
  2.  
  3. Apply sealant to the rear main bearing cap side seals and install the side seals, driving the seals into place with a drift.
  4.  
  5. To complete the installation, use new gaskets and reverse the removal procedures. Refill the crankcase and the cooling system; if equipped with an automatic transmission, check the fluid.
  6.  

VG Engines
  1. Refer to the Engine removal and installation procedures in this section, and remove the engine with the transmission from the vehicle.
  2.  
  3. Separate the transmission from the engine.
  4.  
  5. Remove the clutch assembly from the flywheel (manual transmission) or the torque converter from the drive plate (automatic transmission).
  6.  
  7. Remove the flywheel or the drive plate from the crankshaft, then secure the engine to a workstand.
  8.  
  9. If not having done so, drain the oil from the crankcase, then remove the oil pan.
  10.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the rear oil seal retainer from the rear of the engine.
  2.  
  3. Using a medium prybar, pry the oil seal from the oil seal retainer.
  4.  
  5. Using a putty knife, clean the gasket mounting surfaces.
  6.  
  7. Apply oil to the sealing lip and the mounting surface of the new oil seal, then press the seal into the oil seal retainer. Install the oil seal retainer/seal around the crankshaft.
  8.  
  9. To complete the installation, use new gaskets and reverse the removal procedures. Refill the crankcase and the cooling system; if equipped with an automatic transmission, check the fluid.
  10.  

 
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