[s-cars] Still on 4 cylinders...
John S. Lagnese
jlagnese at massed.net
Tue Dec 20 23:41:23 EST 2005
Did you do the compression test while the engine was hot, displaying the
symptoms? I'm wondering if there is a cracked head or headgasket that leaks
when everything heats up and expands.
John
----- Original Message -----
From: <AUDIJIM at aol.com>
To: <atay at cox.net>; <tony.curran at sympatico.ca>; <s-car-list at audifans.com>;
<quattro at audifans.com>; <Audi5TurboTech at yahoogroups.com>;
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Sent: Tuesday, December 20, 2005 5:21 PM
Subject: Re: [s-cars] Still on 4 cylinders...
> An answer to today's comments on my //S4cylinder.
>
> I have installed all new boots on the coils.
> #4 coil is new.
> The first thing I did was try swapping another complete coil pack from my
> spare AAN on a stand. No help.
> I tried swapping POS's, no help.
> I tried the POS's from the spare engine, no help.
> I purchased new POS's anyway, no help.
> I then tried swapping injectors. No help.
> While I was replacing the injector inserts, I was able to visually inspect
> the top(s) of the intake valves. They were all clean and consistent to
> each
> other.
>
> The parts that I have been trying from my spare AAN came from a perfectly
> running car, before it was totaled from the rear. The engine was out and
> on a
> stand within days of the accident. In fact, it still started up and drove,
> I even
> drove it off the roll back when I received delivery.
>
> I haven't done a cylinder leak down test. Since I had the best compression
> reading from cylinder 4, I didn't deem it necessary to go forth with a
> leak down
> test. I can still do that.
>
> Today I ordered the following:
>
> 20 new lifters
> V/C gasket set
> Timing belt and associated parts
> Water pump and associated parts
> Thermostat
> Serp belt
>
>
> While I have the V/C off, I will inspect for any broken valve train parts.
> Valve train parts usually make some sort of noise when they are broken.
>
> Also, some of you know, this is a Lehmann modified engine prepared by John
> Buffum at Libra Racing back in 1996. I have been talking with John a lot
> lately
> and I have contacted Mr. Lehmann about this issue. The list of mods are as
> follows:
> Lehmann prepared cylinder head, extrude honed
> Lehmann modified RS2 EM, extrude honed
> Lehmann modified RS2 turbo
> Lehmann ECU (obviously)
> Bosch 3 bar pressure transducer
> RS2 fuel injectors
> Lehmann modified pistons, lowered compression to 8.5:1 from 9.3:1
>
> A good friend of mine mentioned a possible cracked piston ring.
>
> Jim
>
> ///S4cylinder
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