[s-cars] 0 compression in 4/5! was-HELP! 4 cylinders just isn't enough....

[Trevor Frank]

A leak down would be nice at least to see if it is a cylinder head
gasket or a bad cylinder, I would bet on the cylinder considering your
blow by issues.  It may not be as apparent when you take things apart.

I guess the real pisser with our motor, and I didn't really think about
this before, is that if you have high crank case pressure, caused by
blow by.  Then you will blow oil through the vent system into the
combustion chamber, this will cause detonation and could damage rings,
often it will crack the compression ring or worse.  So a bad hole on
your motor could trash the rest of the holes by distributing it's
problem via oil into the intake and cause detonation through out the
motor, it would just be a matter of time.

I have recently removed all of the breather's that lead into the intake
tract on my car, or at least I think I got all of them.

I would measure the bore of your block, in at least 3 places and at each
place measure it 3 times at 120deg apart.  If you are using a standard
bore gauge if not and you have a real fancy 3 finger one then just
measure it once.  I didn't hear piston slap but I would be very
concerned that you have some real issue with your cylinders.  Do you
still have stock pistons, or do you have J&E's.

Trevor.



-----Original Message-----
From: brian bilotti [mailto:vinnieb2 at yahoo.com]
Sent: Monday, April 14, 2003 11:10 AM
To: iduff at rcn.com; s-car-list at audifans.com
Subject: RE: [s-cars] 0 compression in 4/5! was-HELP! 4 cylinders just
isn't enough....


Thanks to all on the diagnosis. Just had Edwin in the
shop this am. Sorry to say that the issue was/is 0
compression in 4 and 5 and 150 in the others. Looks
like new pistons/rings, bearings,blah, blah. I think
I'm go throw up now......
bb
--- Ian Duff <iduff at rcn.com> wrote:
> Try
>
http://users.rcn.com/iduff/Audi/PSO_Testing/PSO_testing_FAQ.pdf
> or
> http://www.sjmautotechnik.com/S4_Ignition.htm.
>
> HTH.
>
> -Ian Duff.
> -----Original Message-----
> From: s-car-list-admin at audifans.com
> [mailto:s-car-list-admin at audifans.com]On Behalf Of brian bilotti
> Sent: Monday, 14 April, 2003 1:26 AM
> To: s-car-list at audifans.com
> Subject: [s-cars] HELP! 4 cylinders just isn't
> enough....
>
>
> Dear S-Heads-
> Here's the symptom(s). Edwin starts fine but idles
> very rough and you can imagine what type of
> acceleration (or lack of) there is :-( More info...
> Two weeks ago I had a similar missing problem but
> only
> on boost, I changed the plugs and it seemed fine.
> So,
> now I have new plugs and last night while
> accelerating
> pretty hard this issue cropped up.
> Any ideas? Coil pack, POS unit, etc? How do I check
> this to narrow it down w/out spending a fortune
> replacing many parts?
> I welcome any and all.......
>
> later
> Brian Bilotti '93 S4 "Edwin"
>
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