I know there is a lot of threads like these but I wanted to know what you think it is with my car history and what it's doing. I just installed a used catback and car was fine after first start, started smoking after it warmed up.

Engine rebuilt 5k ago. No OMP, on stock turbos, I was told the JDM engine I got had 40k on it before the rebuild.

I knew my secondary turbo was going to go out soon but it skipped a symptom, I never got smoke in boost, I have some oil in intake tract, oil around secondary turbo.

Fuel in oil but seems like the normal blow by. Also revved it to 4k looking for it to smoke more as I read that it's oil control seals if it smokes a lot at 4k, it wasn't.

Seems like all signs point to turbo, if engine was a bad rebuild I can't imagine seals going bad after 5k? Wouldnt it be instant? Also had no smoke in boost but now I do after test drive today. Car also was down for a month but I started it weekly with no catback to keep everything moving.

I'd also like to add that oddly enough for first few minutes of start up my power FC was showing - AIT values, never seen it do that.

 

Soo... your only symptom of trouble is excess tailpipe smoke after the car warms up?

Oil in the intake is not unusual but puddles and heavy oil consumption is not - how many quarts / 1000mi are you adding?

 

I check oil before I drive the car. I haven't consumed any really since no OMP.

 

A little update, It smoked much much less now. Itll only smoke when the car has been at operating temp for 5 mins. I did pull apart all of my intake pieces and everywhere where there is a coupler there is a film of oil. Has to be turbos, but I dont get more smoke under boost, But I am on the stock cat so maybe its filtering a lot of it.

Would a malfunctioning PCV valve/crankcase vent cause these issues too? I do see small trace amounts of oil around the PCV valve on the filler.

 

Usually if a PCV valve is bad you'll see oil in the air filter and intake manifold. Simple check is run engine at idle and open the oil cap and the engine should stumble slightly. If it is really rough and about to die it isn't venting properly.

 

I undid the oil cap at idle, no stumble, no rough idle or anything, no change.

I did take it for a long stroll, very very little smoke now but a burning smell and noticed I'm not really getting any boost when secondary comes online. Prior to the car sitting everything worked great, now I have strong boost from primary, at transition point boost drops and I don't get full boost until 6k or redline sometimes.

All solenoids were tested before put on the car when engine was rebuilt. Safe to say my secondary is done for?

 

Lack of boost is not a symptom of a blown turbo, except in extreme cases.

 

Hmmm, so based on symptoms what could be causing smoke?

Lol found a split hose on charge relief.

 

are you premixing? maybe a little too much hence the extra smoke?

 

I thought about that too, car was sitting for almost a month, oil I guess settled to bottom of the tank, but I'm running idemitsu, isn't it smokeless? The more I'm running the car right now the less smoke I'm getting, but there is a smell still.

 

Decided to disappear on its own, I'm having a lot of boost issues now. Time to hunt for them.

 

Sounds like you may have just had oil on an exhaust part or something and it burned it off.

 

How's your coolant? The smoking only after warming up might mean a coolant seal is going...

 

Coolant is good, definitely smells nothing like coolant, I've had a coolant seal blow before and the smoke is much thicker. Plus this motor never seen anything above 90 C.