Chrysler Full-Size Vans 1967-1988 Repair Guide

Valve Stem Oil Seal

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REMOVAL & INSTALLATION



Gasoline Engines

This procedure is done with the cylinder head installed.

If valve stem oil seals are found to be the cause of excessive oil consumption, they may be replaced without removing the cylinder block.

  1. Remove the air cleaner.
  2.  
  3. Remove rocker arm covers and spark plugs.
  4.  
  5. Detach the coil wire from the distributor.
  6.  
  7. Turn the engine so that no. 1 cylinder is at Top Dead Center on the compression stroke. Both Valves for no. 1 cylinder should be fully closed and the crankshaft damper timing mark at TDC. The distributor rotor will point at the no. 1 spark plug wire location in the cap.
  8.  
  9. Remove the rocker shaft and install a dummy shaft.
  10.  
  11. Apply 90-100 psi air pressure to no. 1 cylinder, using a spark plug hole air hose adaptor.
  12.  
  13. Use a valve spring compressor to compress each no. 1 cylinder valve spring and remove the retainer locks and the spring. Remove the old seals.
  14.  
  15. Install a cup shield on the exhaust valve stem. Position it down against the valve guide.
  16.  
  17. Push the intake valve stem seal firmly and squarely over the valve guide.
  18.  
  19. Compress the valve spring only enough to install the lock.
  20.  
  21. Repeat the operation on each successive cylinder in the firing order, making sure that the crankshaft is exactly on TDC for each cylinder. See the Firing Order and Distributor Rotation illustrations in the Specifications section of this guide for cylinder numbering.
  22.  
  23. Replace the rocker arms, covers, spark plugs and coil wire.
  24.  

 
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