wierd smoke

[chaclark83]

Ok so its a new build. Long story short It sometimes oil smokes when decelerating. Only when decelerating.

 

[marsh63]

what color is the smoke? valve stem seals id say?

 

[fourreGsixty3]

If its bluish on deceleration, its your valve stem seals.

 

[kottyking]

if your asking a question, you should do it in the form of a question.....

 

[MrBoxx]

Pull off your intake pipe and check your turbo for shaft play. Any in and out shaft play is bad. Any noticeable side-side shaft play is most likely bad.

 

[chaclark83]

turbo is new. and yes I said it was oil smoke

 

[twicks69]

valve seals likely if oil smoke on deceleration.

 

[diablos991]

Do a compression test.
Aside from checking for shaftplay, this should be one of the first tests performed when smoke is occurring.
A leakdown test may also be necessary to pinpoint the problem.
To check your valve stem seals, remove your exhaust manifold and check the runners for thick oily residue.

To me it sounds like valve stem seals, however, a vague description of the problem almost always yields a vague diagnosis.

 

[marsh63]

and what is your deffination of a rebuild? what all did you rebuild? Did you rebuild the head? Did you replace all the seals?

more info befor we can really help you please.

 

[tqmx1]

Ok so its a new build. Long story short It sometimes oil smokes when decelerating. Only when decelerating.

Glazed the cylinder walls on a fresh overhall will act just like bad valve seals. What has the thing been like with oil burn. If it is about the only thing to do is pull the pistons replace the rings and rehone the walls.

Or just run it a little longer and see if they come in.

 

[chaclark83]

Compression is fine. 175 accoss the board, leakdown is great. Fresh build as in everything is new. EVERYTHING

 

[diablos991]

Then it is quite possible that your valve stem seals didn't seat properly or weren't properly installed.

Valve stem seals will not change compression numbers. Remove your exhaust manifold to inspect their condition.

 

[chaclark83]

I have already checked valve guide and replaced seals.

 

[diablos991]

Well, obviously something is wrong here. If everything was new and in perfect running condition, your car wouldn't be smoking.

There are a limited number of things that can happen here if the smoke that you are seeing is in fact from burning oil. Oil is getting either dumped into your exhaust system (via turbocharger), or you have something wrong in your "new" engine that is causing oil to be burned up in your combustion chamber or dumped into your exhaust runners.

Even new parts can be faulty, especially if those new parts were installed improperly.