WHITE SMOKE!!.. Compress. Test Done. head gasket changed HELP??

[STEVEn95tsi]

My car is dumping white smoke out the exhaust. I just replaced the head gasket and got the head checked for leaks and cracks. Put everything together and did a compression test. 165-175 on all four cylinders. Seems good. Also just put on a 14b turbo that came off a car that was driven infront of me. It had no problems. I put the turbo on my car. Primed it. Started it. GREAT!. No smoke. No problems. Then drove it around the block and noticed a cloud of smoke behind me after boosting. Brought the car home and i let it idle a little in the drive way. Only to notice, its smoking at idle now...... SOMEONE PLEASE HELP ME??? i'm running out of ideas.

 

[brian9397gsx]

could possibly be valve stem seals but after boosting has me thinking turbo were are you feeding your turbo from? an old 14b seals may not enjoy the extra pressure from the ofh. also try a leakdown test to figure out what your burning compression tests dont tell the whole story you need to find out whats burning as oil burns white when it does not go through the combustion chamber and of course coolant is white no matter what. hope this helps

 

[rennat]

this happened to me, but on a different car. what happens is that when it idles you have enough vacuum in the manifold to pull oil past the valve stem seals, but not enough into the cylinders. Once you hit boost, BAM, sucks it allll in and makes a james bond effect.

To test:

Let car idle for 5mins.
Get in, and do a short pull in 1st gear, if you have the james bond smoke screen, i'd put money on the fact you have bad seals.

 

[Baron4406]

Same thing happened to me some years back. Got real good at pulling the head off with the motor in the car. My problem was I was using the stock head gasket, I was told you can't boost on it right away you had to break it in. I said the heck with it and sprung for a Cometic. No problems at all then.

 

[brian9397gsx]

also if thats the case check your pcv also a stuck pcv will really pressurize your motor pushing oil out anywhere it can especially valve stem seals

 

[Calan]

also if thats the case check your pcv also a stuck pcv will really pressurize your motor pushing oil out anywhere it can especially valve stem seals

Umm... what? Please explain that.

******************

OP: Did you re-torque the head after letting it warm up to operating temperature before going out and romping on it?

 

[brian9397gsx]

im sorry if its not closing under boost it will pressurize your crankcase

 

[Calan]

im sorry if its not closing under boost it will pressurize your crankcase

Most PCV problems are caused by them becomming clogged and not allowing air to flow properly through the engine to ventilate it. While they can allow boost pressure to enter the crankcase, pressure in the CC is usually caused by problems on the VC breather side, which is where positive pressure is supposed to vent from.

a stuck pcv will really pressurize your motor pushing oil out anywhere it can especially valve stem seals

How would excess pressure in the CC work it's way back up through the piston rings and combustion pressure to leak through the valve seals, into an intake track already pressurized?

*******

Regardless, I don't think that is related to the OP's smoking problem.

 

[brian9397gsx]

yeah it may or may not but ten mins to check a 10$ part is not gonna hurt anything. i work at a dodge dealorship you wouldnt believe the stuff a faulty pcv can cause from evap system problems to them actually freezing and blowing valve covers apart. im a firm believer in a properly working pcv system. lets not turn this thread into a debate over wether or not a pcv will cause smoke. good luck on your problem hopefully some info on here will help you

also retorqueing the head after its been warmed is a good point calan

 

[STEVEn95tsi]

Thanks for all the replies guys. The pcv valve is brand new. I just dropped the turbo from the manifold and there was no smoke coming out the engine. So i'm guessing it might be my turbo?...

My turbo is feed directly from the oil filter housing via a ss line.

 

[brian9397gsx]

yeah you should look into feeding it from the head with a stock 1g line. the stock 1g line has a built in restrictor in it.

 

[STEVEn95tsi]

So too much oil can cause a turbo to smoke?...

 

[Calan]

If you are feeding the 14b directly from the oil filter housing with no restrictor, you are probably over-oiling the crap out of it, causing oil to blow past the seals.

And...did you re-torque the head after letting it warm up to operating temperature?

Check out this related thread.

 

[2slow4now]

Just a few 2 cents even though we know its probably the turbo oil feed. You don't have to buy a new pcv to see if thats the problem just take it off and plug the hose off so you don't suck extra unmetered air into your intake. Go for a small drive and if smoke clears it's the pvc if not then yeah probably the turbo oil feed. Hope this helps some for future reference.

 

[STEVEn95tsi]

Yes i did re-torque the head after warming it up. I also checked the torque spec after couple of miles. So i know thats good. So you think it would be a good idea to buy a oil resistor?..i'll be running somewhere between 8 psi for now... Hopefully after a FPR upgrade i'll move onto 14psi. Would an restrictor be in need if i'm running low psi?... And would that stop the white smoke at idle?..even though idle has low oil pressure?...