Hello, I found this old thread. I have same white smoke problem after installing new k24 turbos with forge motorsports actuators and reprogrammed ECU.

Can you tell me if you solved the problem and how it was solved. after 2 months waiting for reprogrammed ECU i have white smoke and its heart breaking.

I had the car parked on a slight incline . I waited 5-10 minutes for smoke to go away but it was still plenty of smoke so will tow it back to garage .

Id much appreciate help

 

My car is 2003 porsche turbo btw

 

My car smokes until it's warmed up, I found a vacuum check valve in backwards and thought that would fix it but actually made it last longer, it goes away when it's warmed up though. It could be the secondary air pump not putting enough air in the engine when it's cold. It could be the tune running rich too.

 

the only time i see any smoke is if i have parked on an incline and it has to be a significant incline/hill. but it's pretty scary. it goes away immediately. i'd be scared sh*tless if it smoked for MINUTES!

gl with it.

 

To be more accurate, it's more like moisture than smoke. It's gone after a minute now. It might be due to shutting down the motor while your turbos are still too hot. Oil leaks by the seal and burns in your next start up

 

Are you sure it is smoke (oil or ?) you see or are you seeing water vapor?

Water vapor rapidly dissipates even with no wind while (oil) smoke hangs together even with some wind.

Under some climatic conditions my 2003 Turbo can emit/generate some water vapor for some couple of minutes after engine start.

If you are seeing oil smoke the question is are you sure the oil level is OK? An engine with too much oil can generate a lot of oil vapor and the efficient removal of this vapor can be compromised by the excessively high oil level.

If the oil level is ok then I have to question the turbos. Last thing touched and all.

Well, not question the turbos but the turbo seals. If they are leaking they can be leaking because they are installed incorrectly, the wrong seal or seals were used, or perhaps left out of the turbo assembly this can account for some smoking.

That the smoking stops after a while suggests they leak after the engine is shut off and for a while upon engine restart.

Does the engine leak after just a short time off after being fully up to temperature before being shut off?

Are the turbo oil lines ok? Both the feeder lines and the drain lines? If you open the turbo oil collector drain plugs -- one at each collector -- do you get some oil drainage? Is the oil that drains out about the same amount from each turbo? (It won't be a lot of oil, at least this is my experience with my 2003 Turbo, maybe a tablespoon or two.)

Were the heads off? Are you sure the "smoke" is not perhaps coolant vapor? Do you detect an odor of anti-freeze? Is the coolant level ok?

 

i have difficulty with the notion of a 996 turbo owner not being able to instantly differentiate the difference between motor oil "smoke" upon startup and water vapor. but that's just me. but it is a remote possibility. i suppose.

this motor blowing oil smoke after being parked in such a position and angle so as to allow oil to collect disproportionately on one side or other of the engine case(?) and then burn off *relatively* quickly is ( i believe ) well documented anecdotally. again, has happened to me so it's a distinct possibility. as i see "it", the oddity isn't the occurrence of it happening per se, but rather the length of time for it to "burn off". "minutes" isn't right at all.

 

It was the turbo itself. A problem with one turbo. So it seems it wasn't new , but reconditioned . or rebuilt. It looked new. But I'm told they can look new buut not be. . I didn't know

 

The seller says he will have it repaired and send it back to me

Thanks for the comments

 

If these were k24 hybrids or modified wheels of any sort then I'd expect them to be rebuilt and not "new". Makes sense this was an oil seal from your description.

 

^1 gotta be rebuilt if they're hybrids!

OP... good luck with it.. sounds like the guy's doing the "right thing".

 

Agree but I've come upon the occasional owner who mistakes water vapor for "smoke". Granted not often but came upon one not too long ago and I'm I guess kind of still thinking of that.

Neither of my cars is particularly sensitive to being parked on a slope and then smoking.

Whether the engine smokes or not upon cold start -- and the Turbo rarely smokes (once or twice every 5K miles and primarly towards the time for its 5K mile oil/filter service) -- mainly appears to be dependent upon how long the engine was run before being shut off or and whether I let the engine idle some before turning the engine off.

The Turbo gets the "2 minute" idle to cool the turbos while the Boxster sometimes gets some idle time but sometimes it gets shut off rather quickly after being parked.

 

i'm not that particular about the cool down though i do idle for a minute or two if i've really been pushing it. but regarding the oil buildup and smoke on startup, i can almost guarantee i'll have it almost "pour" out if i park on a hill. other than that and the very rare and occasional "puff" i never ( thankfully ) see any oil smoke.

as for how to have it occur? i haven't really figured out what position the car needs to be in for this to happen, i only know it will, so i just avoid parking anywhere but level surfaces! it's quite a sight to see, and i'd just as soon never see it. it ain't pretty, that's for sure

either way it still burns thru oil but having switched some time ago to a full winter fill of 5/50, it neither smokes and as an added advantage, it's rate of consumption also has been lessened. for me, less is better, as 0/40 was a qt per 1k miles, no matter what.