Subaru Coupes/Sedans/Wagons 1985-1996 Repair Guide

Valve Stem Seals

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REPLACEMENT



See Figures 1 and 2

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Fig. Fig. 1: Use a driver to install the valve oil seal



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Fig. Fig. 2: Proper oil seal installation-1.6L and 1.8L engines shown

Replace the oil seal if the lip is damaged or the spring is out of place. Also replace the oil seal when the surfaces of the valves and valve seats are refaced or the valve guides are replaced.

The following procedure may be performed with the cylinder head on the cylinder block by using a chuck and a compressed air source to fill the cylinder with air. This will hold the valve closed and prevent it from dropping into the cylinder.

  1. Remove the cylinder head.
  2.  
  3. Remove the valve and valve spring assembly.
  4.  
  5. Using pliers, remove the valve stem oil seal.
  6.  
  7. Install the new oil seal with an oil seal driver.
  8.  
  9. On the 1.6L engine, install the seal so that it is positioned 0.913 in. (23.2mm) above the spring perch.
  10.  
  11. On the 1.2L, 1.8L and 2.7L engines, do not confuse the intake and exhaust oil seals. The intake seal measures 0.512 in. (13mm) and the exhaust seal measures 0.425 in. (10.8mm).
  12.  
  13. On the 2.2L, 2.5L and 3.3L engines, do not confuse the intake and exhaust oil seals. The intake seal is black and the exhaust seal is brown.
  14.  
  15. Install the valve and valve spring assembly.
  16.  
  17. Install the cylinder head.
  18.  

 
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