Cars Smoking

[Lunch_Box]

Okay I had to replace the head on my girl friends Talon because of a snapped timing belt. Well ever since I got it back up and running it has been smoking pretty bad. At the same time as replacing the head I also put on a used Evo 3 16G. The cars pulls fine up to 10 Psi so I don't think it is the turbo, it has 150 compression in all 4 cylinders and it doesn't smoke under a load just when coming to and idle. I am pretty sure that it is the valve stem seals but I think I am in denial because I don't want to replace them. Is there anything else that it could be?

 

[TSIfreek]

Yea sounds like seals/guides.

 

[GVR4592]

I don't know of any 100% accurate way to verify that valve stem seals are bad but you can use multiple techniques to narrow it down.

While driving the car,if you bring the engine up to 4-5k rpms and compression brake down to 3k or so, then stab the accelerator real quick, and a small puff of smoke will comes out. That usually indicates either worn/sticking oil control rings, or bad valve stem seals.

If it smokes immediately on startup, that is another indicator that the seals could be bad.

You could pull the exhaust manifold and look into the ports and check for excessive oil coming from the guides. It's hit and miss though, because the seals could be fine on the exhaust side and leaking on the intake side.


Good luck

 

[Lunch_Box]

If the car sits over night and you start it up it doesn't smoke, but as soon as it gets up to operating temperatures it will smoke at idle. I have never noticed it any other time except for when I come to a stop.