Date:         Tue, 16 Mar 2004 05:15:04 -0500
Reply-To:     Jonathan Farrugia <jfarrugi@UMICH.EDU>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jonathan Farrugia <jfarrugi@UMICH.EDU>
Subject:      Re: 89 2.1 compression questions
Comments: To: Chip Turpin <turpin3@CHARTER.NET>
In-Reply-To:  <000c01c40b0b$ebd272c0$7fd07744@computer>
Content-Type: TEXT/PLAIN; charset=US-ASCII

Chip

the leakdown tester should have instructions with it but, normally you
supply 90 psi and watch the gauge.  10% is the leakdown for a new engine
and 30% is rebuild time if i remember correctly.  if it is the valves you
should hear or feel air coming out of the exhaust or intake
manifold/throttle body.  if its the rings you should be able to feel hear
air coming out of the dipstick tube with the dipstick out.

jonathan

On Mon, 15 Mar 2004, Chip Turpin wrote:

>  The 2.1 in my 89 syncro is showing low compression , 110, 132, 150,
and 160 this is after engine is warm. When checked with engine cold it is
much higher. why is this? My main question is I was told to do a leak
down test. I know what gauge to get but thats about all I know. How much
pressure do I put in and how can I tell if it's the valves or rings
leaking down or what else can be learned from this test?
>
> Thanks,
> Chip
>