Re: Mystery Knock on 80q

[Bob <mx@snet.net>]

Phil Payne wrote:

> In message <199809281605.JAA10855@warlock.qualcomm.com> Jeff Waterstreet writes:
>
> > 1. Doesn't knock at idle.
> > 2. Doesn't knock if you rev the engine while parked.
> > 3. Only hear it under load; accelerating, usually between 1700 and 2500 rpm
> > 4. Very pronounced/loud when engine cold.
> > 5. When engine is very hot, can't hear it at all.
>

Auxillary vacuum pump shaft.

Bob