Re: Further question on vacuum pump

["Bruce Bell" <bbell@bbell.com>]

----------
> From: dclose <dclose@prepsat.com>
> To: quattro@coimbra.ans.net
> Subject: Re: Further question on vacuum pump
> Date: Tuesday, May 27, 1997 8:21 PM
> 
> 
> Kirby Smith wrote:
> 
> >While lubricating the infamous vacuum pump push rod on my 1988 90q,...
> >
> >This shaft works against a spring...
> >in order for rapping to occur, particularly at idle, a clearance gap
> >would have to exist between the push rod and the shaft...

I checked mine ('87 4kcsq) when doing  the timing belt and installing a
Schrick cam. There was no gap. None. Incidentally, the shaft on the '87 is
round not hexagonal.
 
> It would seem that either a slightly longer shaft or spring would
eliminate
> the gap and solve the problem. Or would that just destroy the pump
> internals?

My car has nearly 200k miles and, as I've said before, when I keep the oil
fresh and clean there is no noise from the pump. Dirty oil causes noisy
lifters and pump. usually takes a couple of oil changes to settle it down
again. Yes I am still using the original lifters.