•
For assembling of a new valve seat, by putting it among the dry ices of an ice box previ-
ously for about 2 hours for the cold shrinkage, and press it in the cylinder head by a special
tool. (bench press)
•
Apply the valve lapping compound on the valve head seating face and lap the valve seat by
turning it until it is seated in its position, then wipe out the lapping compound.
Note : Clean the valve and cylinder head with light oil or equivalent after the valve seat fin-
ishing is completed, and make sure that there are no grinding materials remained.
4) Valve spring
•
Visual check
Visually check the exterior of the valve springs for damage, and replace if necessary.
•
Valve spring free length
Use a vernier caliper to measure the
valve spring free length.
If the measured value is less than the
specified limit, the valve spring must be
replaced.
•
Valve spring inclination
Use a surface plate and a square to
measure the valve spring inclination.
If the measured value exceeds the spec-
ified limit, the valve spring must be
replaced.
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