> I'm having a tough time pin pointing the ugly noise coming
> from my fresh TR4a engine and hoping you can help! I totally
> rebuilt this engine with new or reworked EVERYTHING, so maybe
> I got something wrong?
I hear a very loose (or possibly sticking) valve, plus another not quite so
loose, plus an exhaust leak.
Did you by any chance replace the valve guides with phosphor-bronze ? Did
you know they have to be reamed oversize ?
Randall
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