Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

Valve Seals



Cylinder Head Removed
  1. Remove the head(s), and place on a clean surface.
  3. Using a suitable spring compressor, compress the valve spring and remove the valve spring cap key. Release the spring compressor and remove the valve spring and cap (and valve rotator on some engines).

Use care in removing the keys. They are easily lost.

  1. Remove the valve seals from the intake valve guides. Throw these old seals away, as you'll be installing new seals during reassembly.

New valve seals must be installed when the valve train is put back together. Certain seals slip over the valve stem and guide boss, while others require that the boss be machined. Teflon® guide seals are available. Check with a machinist and/or automotive parts store for a suggestion on the proper seals to use.

To install:
  1. Lubricate the valve stems with clean engine oil.
  3. Lubricate and position the seals and valve springs, again a valve at a time.
  5. Install the spring retainers, and compress the springs.
  7. With the valve key groove exposed above the compressed valve spring, wipe some wheel bearing grease around the groove. This will retain the keys as you release the spring compressor.
  9. Using needlenose pliers (or your fingers), place the keys in the key grooves. The grease should hold the keys in place. Slowly release the spring compressor. The valve cap or rotator will raise up as the compressor is released, retaining the keys.
  11. Install the rocker assembly, and install the cylinder head(s).