Keith,
If you want to adjust the valves, it's interesting and sort of fun.
Order a new rocker cover gasket and the rubber sealing rings for the
rocker cover nuts first.
Remove sparkplugs.
Using the "rule of 9", you adjust valve 1 (rocker will be loose) when
valve 8 is fully down. 8+1=9, 2 when 7 is fully down, etc. Reason for
this is that it's hard to tell when a valve is fully closed--not much
motion on the rocker at that time in the cycle, but it's easy to tell
when one is fully open--lots of motion on the rocker and valve while it's
opening.
You can pull the engine over with the fanbelt and watch this all
happen.
Anyway, when 8 is fully down, rocker1 will be at the loose point in the
cycle. Slip the feeler gauge into the space between rocker and valve.
Should be a smooth even slip fit at .015 with engine at room temperature.
That's hard to judge if you haven't done it a lot, so use a .014 and a
.016. That's known as a "go-no go" fit. The 014 will pass easily (too
easily-but it passes) the .o16 won't go. Since the clearance is now
larger than 014 but smaller than 016, it's close enough.
But suppose the clearance isn't right. At 78M miles, if valves haven't
been adjusted regularly, it's not going to be right. Holding the
adjusting screw with a screwdriver, loosen the locknut with a box wrench.
Unscrew the adjuster to get the clearance you want. Holding the setscrew
with the screwdriver, snug the nut with the wrench.
Go to #2 valve, when #7 is fully down. Same methods. On to #3.
This sounds complicated, but it doesnt' take much longer to do it than
to write about it.
Bob
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