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re: 20V CQ noise ...
<<'90 (?) 20V Coupe Quattro with ~115K on the clock. Apparently
it makes a fairly noticeable "bearing-like" noise when the engine
is revved from idle to about 1800 rpm. No noise above that, or
when decelerating. All this with the transmission in neutral ..
I thought this might be the well-known distributor rattle,
but aren't those symptoms somewhat different?
Any help would be appreciated !
I've heard that it could be two things:
1) the dohc at the rear of the head uses a chain to connect the cams et al;
this can get loose over time and rattle.
2) the timing belt can be too loose, allowing the rattle.
No experience with either, just suggestions.
Chris Miller, Windham NH, firstname.lastname@example.org, '91 200q, no rattles