Hyundai Coupes/Sedans 1986-1993 Repair Guide

Rear Main Oil Seal

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REPLACEMENT



The rear main seal is located in a housing on the rear of the block. To replace the seal, it is necessary to remove the engine and perform the work on an engine stand or work bench.

1468cc and 1495cc Engines

See Figure 1

  1. Remove the engine from the vehicle and position on a suitable holding fixture.
  2.  



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Fig. Fig. 1: Rear main oil seal installation-1468cc and 1495cc engines

  1. Unscrew the retaining bolts and remove the housing from the block.
  2.  
  3. Remove the separator from the housing.
  4.  
  5. Using a small prybar, pry out the old seal.
  6.  
  7. Clean the housing and the separator.
  8.  

To install:
  1. Lightly oil the replacement seal. Tap the seal into the housing using a canister top or other circular piece of metal. The oil seal should be installed so that the seal plate fits into the inner contact surface of the seal case.
  2.  
  3. Install the separator into the housing so that the oil hole faces down.
  4.  
  5. Oil the lips of the seal and install the housing on the rear of the engine block.
  6.  
  7. Remove the engine from the holding fixture and install in vehicle.
  8.  

1596cc, 1796cc, 1997cc, 2351cc and 2972cc Engines

See Figures 2, 3, 4 and 5

  1. Remove the transaxle and clutch from the car as described in Drive Train . Remove the flywheel or driveplate and adapter plate.
  2.  



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Fig. Fig. 2: Rear main oil seal components-1596cc, 1796cc, 1997cc and 2351cc engines



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Fig. Fig. 3: Rear main seal installation-1596cc, 1796cc, 1997cc and 2351cc engines

  1. Unbolt and remove the lower bell housing cover from the rear of the engine. Remove the rear plate from the upper portion of the rear of the block.
  2.  



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Fig. Fig. 4: Rear main oil seal installation-2972cc engine



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Fig. Fig. 5: Rear main oil seal case sealant application points

  1. The lower surface of the oil seal case seals against the oil pan gasket or sealer at the rear. On engines with a gasket, carefully separate the gasket from the bottom of the seal case with a moderately sharp instrument. You may want to loosen the oil pan bolts slightly at the rear to make it easier to separate the two surfaces. If the gasket is damaged, the oil pan will have to be removed and the gasket replaced. On vehicles employing sealer, you'll have to unbolt and lower the oil pan now, and then clean both surfaces, apply new sealer, and reinstall the oil pan after Step 7 is completed.
  2.  
  3. Remove the oil seal case bolts, and pull it straight off the rear of the crankshaft. Remove the case gasket.
  4.  
  5. Remove the seal retainer or oil separator from the case, and then pry out the seal. Inspect the sealing surface at the rear of the crankshaft. If a deep groove is worn into the surface, the crankshaft will have to be replaced. Lubricate the sealing surface with clean engine oil.
  6.  
  7. Using a seal installer, install the new seal into the bore of rear oil seal case in such a way that the flat side of the seal will face outward when the case is installed on the engine. The inside of the seal must be flush with the inside surface of the seal case.
  8.  
  9. On all engines except the 2972cc, install the retainer directly over the seal with the small hole located at the bottom. On 2972cc engine, after cleaning the oil case mating surface thoroughly, apply a suitable sealing agent to the oil seal case shaded areas as shown in the figure. Then, install a new gasket onto the block surface and install the seal case to the rear of the block. Torque the seal case bolts to 7-9 ft. lbs. Retorque pan bolts, as necessary. Refill the oil pan if necessary.
  10.  
  11. Install the rear plate and bell housing cover. Install the flywheel or drive plate and the transaxle in reverse of the removal procedure.
  12.  

 
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