Ticking 80 Quattro

[David.Ullrich at ferguson.com]

The pump is there to increase the vacuum for the brake booster when you are on the throttle. The engine naturally produces plenty of vacuum when off the throttle, but it may run out (it has a vacuum reservoir) if you are doing some really spirited driving so that you are on the gas and brake at the same time (heal-toe driving) like when you are on the track. For 99% of drivers, 99% of the time, it is 100% useless.

Dave

1987.5 Audi Coupe GT "Special Build" 2.3 - Anthracite Black
1998 VW Passat GLS 1.8T - For Sale CHEAP
1985 Chevy Impala SS
2002 VW Jetta GLS 1.8T Tiptronic
1993 RX-7 R1




-----Original Message-----
From: Per Lindgren [mailto:lindgre at online.no]
Sent: Monday, June 03, 2002 9:16 AM
To: quattro
Subject: Re: Ticking 80 Quattro


Why is the pump there in the first place? My car doesnt have this, but
the engine looks identical otherwise (apart for the cruise control unit).

PerL
87 Cq

David.Ullrich at ferguson.com wrote:

>Have you ditched the brake booster vacuum pump? it has a push rod that runs off the cam and tends to get loud. Many people who tick blame the lifters only to discover that it's the brake booster. Just open up the pump, pull out the rod and put the pump back together. See http://pw2.netcom.com/~duandcc/pictures/1987.5CGT/vacpump.jpg for a pic of the pump in question (pic is of a KX engine, but you'll get the idea).
>
>Dave
>
>1987.5 Audi Coupe GT "Special Build" 2.3 - Anthracite Black
>1998 VW Passat GLS 1.8T - For Sale CHEAP
>1985 Chevy Impala SS
>2002 VW Jetta GLS 1.8T Tiptronic
>1993 RX-7 R1
>
>
>-----Original Message-----
>From: pshenm at rpi.edu [mailto:pshenm at rpi.edu]
>Sent: Sunday, June 02, 2002 8:57 PM
>To: quattro at audifans.com
>Subject: Ticking 80 Quattro
>
>
>My brother's '88 80 Quattro is making a ticking noise (metal onto metal
>clank) when it is cold.  The ticking speed varies with RPMs.  Originally
>thought it was lifters and replaced all of them, still same noise.  Doesn't
>do it once the engine has been warmed up though, only after it has been
>sitting for an hour or more.
>Any ideas?
>TIA
>Mike Pshenishny
>'87 5ktq
>
>
>
>
>