Compression Test

Boostin'X' · Mar 21, 2004

155-155-155-160
Weisco Pistons, std. bore, with chrome rings.
I have been getting a grey or blue smoke from the exhaust. I did a test to see if it is the rings and the test seemed good. I think I either might have valve seals leaking or my turbo seals may be going. The whole engine was rebuilt about 4k miles ago. Any opinions on this? I haven't really used any oil, I do have a small leak from the oil return line.

eyebrowski · Mar 22, 2004

what compression are those weiscos?

Boostin'X' · Mar 22, 2004

stock compression with a cometic h/g, i think I figured around 8.3:1

edit, I only get the smoke at WOT, and I have no emissions or pvc system.

eyebrowski · Mar 22, 2004

your compression looks OK then... Did you have the head rebuilt also? Does it smoke if you drive after its idles or start it after its sat for a little? If not my guess is turbo.

Boostin'X' · Mar 22, 2004

yeah head was rebuilt. Doesn't smoke when I start it. and it does after decelling to a stop. It's weird. I think i am going to pull the turbo off tonight or tommorow and see. Think it could be anything else. I was thinking it could be the rings because i never bored the block over, and the block had 60k miles on it, but the bore was well in spec when I rebuilt it.

diambo4life · Mar 22, 2004

I agree George it's weird. It would puff out some smoke when you just start it and stops, sometimes when you were driving slow (say part throttle) it will smoke a bit and when you just jab the throttle WOT it will let out a big puff of blue smoke then regular black smoke.:dunno: Honestly, that's weird since your "ring-test" shows that's probably not the problem.

eyebrowski · Mar 22, 2004

high oil pressure :dunno:

Boostin'X' · Mar 22, 2004

yeah I do notice on the stock gauge it is kinda high like at the top of the can thing when going on the highway. but it is a stock gague.

eyebrowski · Mar 22, 2004

Are you getting your feed from the filter housing? Wierd the garrets tend to handle oil pressure better than the mitsus though... Maybe you have a build up somewhere.

91TSiGuy · Mar 22, 2004

You probably don't need to yank the turbo to check it out. Just remove the intake and check for shaft play, any oil on the inlet opening, and possibly flush out your intercooler. Another thing that may be putting some oil into the system would be a bad PCV valve.

Boostin'X' · Mar 22, 2004

I think the return line is kinked causing it to build pressure in the line and leak past the gasket and seals causing it to smoke, I am going to reclock the center section tonight.
edit i have no pvc system no shaft play or oil on the inlet.

Boostin'X' · Mar 22, 2004

I'm pretty positive after running a little 'test' that the oil line is kinked, given the volume of oil that is pumped out say at WOT, its probably backing up in the line, and blowing out the gasket and out of the seals, the turbo smells like a box of metal crayons or really burnt oil, how ever you look at it.

Falconsra · Mar 23, 2004

I did a compression test on my car the other day right after I bought it. 175-175-174-175

Not many miles on this motor.

-Nick on Andrews screen name because friggin DSMtalk wont let me register.

Boostin'X' · Mar 23, 2004

Ok???
Anyways, it's the turbo. The oil seal on the exhaust side was blown. Will be sending of the turbo to PTE tommorow.
Looks like what mike was seeing was the left over oil after a pull from spraying burning off. I'm just glad it wasn't the rings. Hopefully it will be covered under warrenty.

eyebrowski · Mar 23, 2004

Glad to hear you got it taken care of, good luck!

Boostin'X' · Mar 23, 2004

Thanks for the help

diambo4life · Mar 23, 2004

zzzz zzzz No more using the smoke screen technique when we race next time.

Let me know how it goes.

Boostin'X' · Mar 23, 2004

so that is why you didn't see the cop....

Compression Test

Boostin'X'

eyebrowski

Boostin'X'

eyebrowski

Boostin'X'

diambo4life

eyebrowski

Boostin'X'

eyebrowski

91TSiGuy

Boostin'X'

Boostin'X'

Falconsra

Boostin'X'

eyebrowski

Boostin'X'

diambo4life

Boostin'X'

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