[acna_pcc] Still on 4 cylinders.....No Dice!

[Tyson Varosyan]

Jim,

I am not too familiar with your engine, but have you removed the valve cover
yet? A broken valve stem on ether intake or exhaust could cause your issue
and result in a great compression test result.

Have you checked inside the cylinder for oil? A large oil leak (rings or
head gasket) can make compression test higher because during the compression
stroke the oil keeps the air back for a split second. Leak-down test is a
must here.

Tyson Varosyan
Technical Manager, Uptime Technical Solutions LLC.
tyson at up-times.com
www.up-times.com
206-715-TECH (8324)

UpTime/OnTime/AnyTime 

-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of AUDIJIM at aol.com
Sent: Thursday, December 29, 2005 2:20 PM
To: vonk at bayarea.net
Cc: acna_pcc at yahoogroups.com; quattro at audifans.com; s-car-list at audifans.com;
Audi5TurboTech at yahoogroups.com
Subject: Re: [acna_pcc] Still on 4 cylinders.....No Dice!

Harald,

Now that sounds like something worth checking out. I have a hard time 
believing the bad piston ring theory, because #4 cylinder had the best
compression 
when I performed a compression test. (before you ask, I tested when cold)
That 
would also eliminate any bad valves (as far as how well they are 
seating/sealing) Harald's theory also holds water to the fact that my engine
ran worse after 
an oil change with Mobil 1 15-50. Perhaps the change in viscosity had an 
effect on this engine/valve train. I have an RS2 exhaust cam coming from one
of my 
vendors in the UK. I would love to install it, but I would like the engine
to 
run correctly before I modify it any more. I'll try replacing the valve 
springs on #4 cylinder next.

Thanks,

Jim
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