Checking cam timing without disassembling the engine (TR2-4A)
OK, a simple way to check with engine together & in the
car, if it's a
symmetrical lobe cam...
Set #4 (6) inlet & exhaust valve clearance to a big number,
enough for most profiles. It doesn't matter what the number is,
it just has
to be accurate, make sure it's right on the base circle when
you set it.
Then turn the engine by hand until the #1 cylinder is at TDC
combustion stroke. At that point the #4 (6) exhaust is on the
closing ramp & the inlet is opening & if
the cam is set straight up, no advance/retard,
the clearance on #4
(6) valves will be equal. If not, just turn crank slightly until
is equal & note variation from TDC.
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