2G Major white smoke from exhaust.

[SameOldDSM]

95 Gsx 6 bolt swap

Rebuilt due to bend rod and this same smoke issue I'm currently having even after a full rebuild.

Rebuilt went great runs perfectly as of right now. Get into boost nicely on stock tune making 18lbs roughly. Decel after boost will completely smoke the road out at times, but sometimes it does it other times it doesn't as much. But literally smokes the entire road out with a toxic smell, I'm at a loss for words on for to describe how thick the white smoke is. Nothing like coolant or oil (both of which are perfect and clean)

My only guess is the turbo is getting too much oil pressure because it doesn't have a regulator on the feed line so I'm pretty sure it's seeing the full 80+ lbs of pressure and blowing seals?? But it's my understanding that it would be burning oil (blue smoke) if this was the cause. Otherwise the car is running shifting and starting great. And will sit and do 2 step launch control with no smoke making boost perfectly (don't ask me how I know this)

Need some help please, I have a regulator fitting that should fit in the feed side of the turbo to keep pressure around 40. Otherwise I am completely stumped as it was doing exactly this with a slightly bent rod before the rebuild with a different 20g turbo

ill add some photos from the rebuild below if I can find them, I was not able to record the white smoke issue.

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[92AWDHX40]

Coolant is white, so do a leak down test

 

[dwb]

Is the crank case breather still capped?

 

[SameOldDSM]

The breather on the side is still capped but the breather facing the rear of the valve cover is ran into the intake manifold directly.

 

[SameOldDSM]

Coolant is white, so do a leak down test

I will in the next few days and update with what I find. Seems odd I'm still having this issue with freshly machined surfaces and mls head gasket with arp studs.

Does that mean this isn't a turbo issue since my turbo only has oil lines, no coolant?

 

[dwb]

The breather on the side is still capped but the breather facing the rear of the valve cover is ran into the intake manifold directly.

Try routing that capped breather back to pre-turbo intake. I bet that fixes your problem.

Once upon a time I thought it would be a good idea to put a fuel filter inline on that breather line. It ended up being a restriction and did almost exactly what you described, a smoke screen when let off the throttle after getting on it.

 

[SameOldDSM]

Try routing that capped breather back to pre-turbo intake. I bet that fixes your problem.

Once upon a time I thought it would be a good idea to put a fuel filter inline on that breather line. It ended up being a restriction and did almost exactly what you described, a smoke screen when let off the throttle after getting on it.

I will try this today. Do you mean leave the other one how it is and add another line preturbo?

 

[dwb]

I will try this today. Do you mean leave the other one how it is and add another line preturbo?

Yes, PCV valve on the back side of the rocker cover should remain direct to the intake manifold. Just add a new line from the side breather to the intake snorkel like it was stock.

 

[SameOldDSM]

Yes, PCV valve on the back side of the rocker cover should remain direct to the intake manifold. Just add a new line from the side breather to the intake snorkel like it was stock.

Right on, I'll update later today with what it does.

 

[SameOldDSM]

Yes, PCV valve on the back side of the rocker cover should remain direct to the intake manifold. Just add a new line from the side breather to the intake snorkel like it was stock.

Did exactly as you said and it hasn't puffed any smoke yet. Haven't driven alot so hopefully it stays that way .

Any explanation as to why that would have caused all the smoke?

 

[Car Cannibal]

After a break in its good to check compression and leak down anyways so you have those numbers moving forwards. Also do a Coolant pressure check and if those are all good, you've passed the scary tests and most likely have something less time consuming and expensive.

 

[SameOldDSM]

After a break in its good to check compression and leak down anyways so you have those numbers moving forwards. Also do a Coolant pressure check and if those are all good, you've passed the scary tests and most likely have something less time consuming and expensive.

I did a coolant pressure test before taking it out today and I pumped it to 13psi and it held perfect.

 

[dwb]

Did exactly as you said and it hasn't puffed any smoke yet. Haven't driven alot so hopefully it stays that way .

Any explanation as to why that would have caused all the smoke?

Good to hear it helped. Your dipstick thanks you

I know it's due to excessive crankcase pressure, but exactly what/why I'm not sure. Could be valve stem seals, PCV valve, or maybe pushing oil past the rings.