[s-cars] compression data

Joshua Van Tol josh at spiny.com
Thu Sep 24 11:00:36 PDT 2009


A leakdown test would help of course, but I'd be looking for an exhaust leak
if you've got a pop on decel.
Those low readings on 3 and 5 are a bit worrying, but I wouldn't rebuild
just yet. Look for exhaust leaks, and try a leakdown test. It could be that
you've got a few valves not seating well.

On Thu, Sep 24, 2009 at 12:46 PM, Robert Myers <bob at chips-ur-s.com> wrote:

> *This message was transferred with a trial version of CommuniGate(r) Pro*
>
> Hi Y'all,
>
> I finally got to determining the compression for the AAN engine
> (RS2ed, etc).  I'm a little concerned.
>
> Cyl #   PSI
>   1    165
>   2    150
>   3    130
>   4    150
>   5    130
>
> These numbers go with the engine which was producing the noises I
> reported hearing a couple of weeks ago - mild exhaust backfire on snap
> let-off.
>
> What do these numbers suggest?  IOW, am I staring an engine rebuild
> in the face?
>
> Bob
>
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