Compression test normal? white smoke?

[dfgu]

Hi all.. I have a 91 talon tsi..
I have white smoke that comes out the exhaust when I first open the throttle, but after that once, it's fine unless the car is sitting at idle...
I know white smoke is water being consumed..

I did a compression test and I got 130, 130, 125, 130..
I know it's kinda of low but service limit is 121 right?..

THe only thing that I can think that is going wrong is the turbo housing might have a little crack in it?...

any suggestions?

Thanks.

 

[billdo_83]

My car does that to.
Its probably just moisture.
When its colder out it gets worse too.

 

[2GRS-T]

If the smoke gets bad... it could be your turbo...

 

[billdo_83]

If it smells like coolant there is a problem also.

 

[nukefission]

Headgasket? Do a leakdown test and look/listen at the water neck for bubbles or leaking air.

 

[dfgu]

Definately not headgasket.. I've done the compression tests and everything is ok.. If it was headgasket, I would lose compression too right?

My only conclusion is that the turbo probably has a little hairline crack in the housing and the water is being consumed in there...

Car runs fine, boosts fine, oil temp and level is good, water temp is good..

 

[luv2rallye]

Worn turbo coolant seals will also cause white smoke.

 

[dfgu]

Is that easily fixed?

 

[c5chris]

Add a can of Restore and let it idle. See if it will belch some white smoke afterwards.

 

[dfgu]

Isn't restore for the engine oil?

I tried Bars Leak and put it in the radiator.. did very little.. but not a whole lot.. should I just put another bottle in and see what happens?

 

[c5chris]

Isn't restore for the engine oil?

I tried Bars Leak and put it in the radiator.. did very little.. but not a whole lot.. should I just put another bottle in and see what happens?

Of course it is for engine oil. Add a can, let it idle, and see how it goes from there.

 

[mitsuclipsegsx]

"nukefission Headgasket? Do a leakdown test and look/listen at the water neck for bubbles or leaking "




how do u do a leakdow test?

 

[FASTSPOOLINGST]

My car does the same. I did my compression test this morning, I got 165 across the board. This is just swapped 2 months ago jdm engine. I am getting smoke during boost and if I rev it at idle.

My compression is perfect. Every part on my car is brand new except the block, head, and intake.

The turbo is brand new, it's a SBR G-50.

I don't know wtf is going on with this smoke.

I'm thinking maybe the valve seals, but i'm not sure.

Anyone else have any insight as to what it could be?

 

[billdo_83]

White smoke is coolant.
I have seen bad headgaskets and compression testers have given good numbers across the board. My car for example......

 

[tommiman]

Sounds like coolant to me too. Smell the exhaust. If it smells sweet then it's gotta be coolant. Do a leak down test. Also check your oil dipstick. If it's milky white then there's a good chance the head gasket went and coolant is contaminating the oil.