> Can anyone check confirm the original TR2/3/4/4A?repair
> manual specs for valve guides, especially on the exhaust side
> (if it differs from the intake)?
TR2-3 factory workshop manual gives .001-.003" for intake, .003-.005" for
exhaust. But that is for the 3/8" exhaust stems.
Note that the clearance is supposed to be built into the valve stem; the
target diameter for the guide is the 'nominal' diameter. Thus intake guides
are 5/16" while intake stems are 5/16 minus .002" (the nominal clearance).
Exhaust guides are 3/8", while exhaust stems are 3/8" minus .004".
Then all measurements are +/- .0005", giving the range of clearances.
My 4-4A Bentley gives the same numbers (and fails to mention the 5/16"
exhaust stems).
Randall
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