View Full Version : What is the good cylinder compression for an MC-1 10vturbo engine from an 87 5ktq?


Xel
01-24-2004, 03:16 PM
Test drove an 87 5ktq for sale today. has 192K kms on the clock. It was a backup car for the owner so it didn't get driven much. The engine ran with a little clunking kinda sound. Not very loud, but not how it ran on my old 200t. When I drove it pulled pretty nice. The owner said that usual boost is 1.3 bar but sometimes it wnt up to 1.5/ When I test drove it hill it would take off at 3K rpm, so I am guessing the turbo is still in good shape. That clunking noise in the engine is what I don't really like, so I was going top do a compression check and see if it is still good. I know that it should be consistent number through out all 5 cylinders, but what would a good number should be? What was it for a brand new engine?

I love booooost:D

TIA

Adam Mowafy
01-24-2004, 03:33 PM
According to my bentley manual the limit for comression on this motor is 94.

So if it's any lower than that....ehhhh no:(

I'm not sure but nornmal might be around 120?

remember to open the throttle all the way when doing the test otherwise you will get a false reading. Just pull the coil wire off so nothing fires...

boxerfan
01-24-2004, 04:09 PM
about 125 to 126 I believe... but don't hold me to it. Most importantly you don't want the readings to fluctuate wildly from cyl to cyl. +/- 1 is OK from what I've been lead to believe.

Cheers;

Boxerfan

Xel
01-24-2004, 04:59 PM
<center><img src="http://members.shaw.ca/mlovas/audi/DSCF0016.JPG"></center><p>

boxerfan
01-24-2004, 06:09 PM

Adam Mowafy
01-24-2004, 07:07 PM

treehunter
01-25-2004, 12:21 AM
Heyyyyy, is this the one in the van buy-sell for $1900? You gonna buy it? Owner mentioned a parts car too...

treehunter
01-25-2004, 12:26 PM
Could it be a busted motor/tranny mount?

cuatrokoop
01-25-2004, 03:50 PM
Rusted cat. conv. hangers (they are metal brackets), bad motor/trans mounts (any of the 5), bad alt. bushings, all sorts of stuff can make a rattle/clunk.

Xel
01-25-2004, 09:44 PM
by the time I made up my mind(6 hours later) and gave him a call back, he said that somebody bought 2 hours after I left, lol

Oh well, gonna keep looking :-)

treehunter
01-25-2004, 10:34 PM
Heh, yeah...how was the interior though? The price was pretty good. But I think he said the bomb was toast...oh well, there'll be others.

AndrewsQuattros
01-26-2004, 02:08 PM

Xel
01-28-2004, 10:18 PM