Before reassembly, check that all lapping compound has been cleaned from the
head. Remember that each piece being reused must be reinstalled in its original
position.
- Position the spring seat on the head. The seat will be forced into its final
position in the next step.
- Install the valve stem seals and insure proper installation of the spring
seats.
- Thoroughly coat the valve stem with clean engine oil. Insert the valve slowly
from underneath, guiding it gently through the new seal. Make sure the valve
will slide up and down smoothly, indicating the seal is in proper position.
- Install the valve springs with the color–coded end facing upward.
Install the retainer on top of the spring. Compress the retainer with the
valve spring compressor until the retainer sits below the groove in the valve
stem.
| Fig. 1: Using the proper Mitsubishi tool for the
installation of the valve seals
|
- Install the keepers, making sure they stay properly positioned in the stem
groove, and release the tension on the compressor slowly. Note that if the
keepers do not sit squarely in the grooves, the valve spring tension could
be released suddenly either as you work, or later as the vehicle is in operation.
Once the keepers have locked securely, remove the valve spring compressor.
- Repeat the sequence for each intake and exhaust valve.
NOTE: After valve spring assembly installation tap the
top of the valve springs to make sure the valve keepers are seated properly.
