[Supras] how are these compression and leakdown #s?

Bob bob at hairballcreations.com
Fri Aug 4 20:38:04 CDT 2006


You don't want my opinion...

Blue is oil...

Black is fuel...

White is water (coolant)...

Does the exhaust smell sweet like maple syrup?  That is the easiest way (but
not the most accurate) to diagnosis a coolant problem

Bob

-----Original Message-----
From: supras-bounces at supras.com [mailto:supras-bounces at supras.com] On Behalf
Of Jordan Weaver
Sent: Friday, August 04, 2006 9:24 PM
To: 'Supra'
Subject: [Supras] how are these compression and leakdown #s?

I'd appreciate some input on the numbers I got from a compression and
leakdown tests I did on my supra. 

A short version of what's wrong with my car is:
- had white smoke out the exhaust while stopped and idling, but could not
see any smoke in the rear view mirror while driving.
- Took off my turbo and saw a small pool of oil btw the exh. Manifold and
the turbo. Rest of manifold looked dry. Rear of turbo was oily also.
- Sent turbo off to Performance Techniques to be rebuilt.
- Finally put everything together and I have a new problem. As far as I can
tell from inside the car, White smoke on wot, or boost. I can drive around
pretty normally without any smoke. Once warmed up, I get white/grey smoke
while accelerating hard (boost) or wot. 


Compression Test (psi):
#1: 160 #2: 170 #3: 160 #4: 160 #5: 170 #6: 150

Leakdown Test (100-95 psi from compressor - #s are % leakage)
#1: 20 #2: 25 #3: 35 #4: 25 #5: 20 #6: 35

All leakage was clearly coming out of oil filler cap / PCV system. I could
not detect any bubbles from radiator.

I was suspicious of a BHG, but I am pretty sure the leakdown test gives me
good odds that a BHG is not my problem.

Thanks for your help
Jordan


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