S14 SR20 Still Burning Oil at Idle After Replacing Turbo
Hi Everyone, I'm having some issues with my S14 SR20 blacktop (stock internals) burning oil at idle. I've done a ton of searching and all the threads I can find with other people having my same symptoms lead back to turbine seals, but I have replaced the turbo completely and its still doing the exact same thing!?
Here's whats happening... upon a cold start there's absolutely no smoke at all, idles great, and has no loss of power. After about 15 minutes of driving when the engine is up to temperature, grey-blue smoke comes out the exhaust when idling. Its kind of a steady stream, not massive thick plooms, but when I give it gas it poofs a bit and then goes away. When I'm driving around it doesn't smoke at all until I'm stopped at red lights or driving with negative crankcase pressure like down a hill in gear or something. And it's definitely burning oil (synthetic 10w30), not coolant, I'm quite familiar with the difference in the colour and smell of the two.
I've taken it to a mechanic I know and trust, in fact he did the SR swap for me in the first place 2 years ago. He did a compression and leak down test and all was good there. He also took the turbo completely out and inspected it and all the piping for oil residue but it was completely clean. And no Oil coming out the BOV either.
We replaced the turbo anyway because it seemed like the cheapest option between that and valve seals or anything else engine related but its still doing the exact same thing...
I'm even a bit hesitant to rip the engine apart to replace the valve seals because typically the primary symptom of that is a puff of smoke on start-up after the car has sat for a period of time, and that's just not happening at all. Its only after the car is up to temp that it starts to burn oil. But we cant think of what else it could be.
Any help would be greatly appreciated!
Thanks!
Here's whats happening... upon a cold start there's absolutely no smoke at all, idles great, and has no loss of power. After about 15 minutes of driving when the engine is up to temperature, grey-blue smoke comes out the exhaust when idling. Its kind of a steady stream, not massive thick plooms, but when I give it gas it poofs a bit and then goes away. When I'm driving around it doesn't smoke at all until I'm stopped at red lights or driving with negative crankcase pressure like down a hill in gear or something. And it's definitely burning oil (synthetic 10w30), not coolant, I'm quite familiar with the difference in the colour and smell of the two.
I've taken it to a mechanic I know and trust, in fact he did the SR swap for me in the first place 2 years ago. He did a compression and leak down test and all was good there. He also took the turbo completely out and inspected it and all the piping for oil residue but it was completely clean. And no Oil coming out the BOV either.
We replaced the turbo anyway because it seemed like the cheapest option between that and valve seals or anything else engine related but its still doing the exact same thing...
I'm even a bit hesitant to rip the engine apart to replace the valve seals because typically the primary symptom of that is a puff of smoke on start-up after the car has sat for a period of time, and that's just not happening at all. Its only after the car is up to temp that it starts to burn oil. But we cant think of what else it could be.
Any help would be greatly appreciated!
Thanks!
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