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Urgent Help Please

mr_rbman

By mr_rbman,
in Engines & Forced Induction

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mr_rbman Grand Master

mr_rbman

Posted
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well last night i went to leave for work and got about 20 metres down the road and couldn't see out my rear view mirror from all the WHITE smoke so naturally i quickly pulled a u-turn and put the car in the garage and took the girlie's car to work as i was running late as it was!

Now i'd just put a new catch can on that i'd made and i just presume i didn't vent it properly (was trying to make it legal) which caused this mess!

Now this morning i put my old catch can back on which is vented with a filter and a few small 1/8 holes! I took it for a drive and it was still smoking but not quite as bad! I'm hoping this is just oil that was still in the exhaust etc burning off??? i pulled back into the garage and there was oily smoke coming from the engine bay (mainly around the turbo, can see slight oil marks/stains where the dump pipe meets the exhaust housing) and exhaust!

Basically have i stuffed something (can't see how?) or do i just need to vent my new catch can and wait for the oil to get out the system? I was reading somewhere that its illegal to have a 'venting' catch can but if you don't vent it properly does this problem i'm having happen or have i made it or hooked it up wrong?

Cheers in advance!

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TurboX Mentor

TurboX

Posted
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Have done this a few times as well and it seems to clear up fairly quickly and I dont think it will be damaged. :(

Probably idle it off in the driveway as some mongrel will see the smoke if your on the road and dob you in to EPA.

Your breather should by rights vent back into the airbox intake.

jazza08 Mentor

jazza08

Posted
Posted

I had the same problem, the catch can has a breather in the system... should work ok, are you still getting oil smoke? You may of damaged the oil seal on the turbo? Go have a look at your intercooler, you should find oil deposits in there! Clean it out with metho/kero (ie drain it n empty until it runs clean, DONT tip the cooler upside down as the oil will run through it lol) and clean the pipes out then go for a hard drive to burn any oil sitting in the zorst and have another look to see if that helps, personally im still abit stuck with it all but im tryin the cooler cleaning next week.

mr_rbman Grand Master

mr_rbman

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  • Author
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I had the same problem, the catch can has a breather in the system... should work ok, are you still getting oil smoke? You may of damaged the oil seal on the turbo? Go have a look at your intercooler, you should find oil deposits in there! Clean it out with metho/kero (ie drain it n empty until it runs clean, DONT tip the cooler upside down as the oil will run through it lol) and clean the pipes out then go for a hard drive to burn any oil sitting in the zorst and have another look to see if that helps, personally im still abit stuck with it all but im tryin the cooler cleaning next week.

i hope its not the turbo cause i've been through that with my old turbo and my new 35/40 is only 2000kms old so it better not be that!, i'm 99% certain its the catch can because it only happened when i installed the new catch can!

r33_racer Grand Master

r33_racer

Posted
Posted

The catch can needs to vent to atmo or somewhere...crankcase pressure will build up and bad breath will come out somewhere else. Std breather goes back into intake pipe so instead just put a little filter off a hose tail on your catch can somewhere and let it breath off that.

mr_rbman Grand Master

mr_rbman

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Posted (edited)
The catch can needs to vent to atmo or somewhere...crankcase pressure will build up and bad breath will come out somewhere else. Std breather goes back into intake pipe so instead just put a little filter off a hose tail on your catch can somewhere and let it breath off that.

this is what i thought but i heard that venting into the atmosphere is illegal with catch cans? I have my old catch can back on (the one in the pic which vents via a filter!) It seems to be fine, just getting all the oil out the system now is the pain staking part. Mind you it is still blowing a bit of smoke but nowhere near as much!

Edited by mr_rbman
mr_rbman Grand Master

mr_rbman

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just took it for a quick hard drive and it only smokes a tiny bit driving normally but when it hits boost the smoke is much worse! To me that sounds like the turbo but considering its new and i changed the catch can and all this happened i'm still lenaing towards the catch can being the source of the problem???????????????????

mr_rbman Grand Master

mr_rbman

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just took the cooler off and there's a bit of oil in that which is probably causing the white smoke when the engine hits boost! Currently cleaning it now and will hopefully get it back on tonight fingers crossed!

TTT Grand Master

TTT

Posted
Posted

Latest ZOOM has a great little article regarding crank case pressure and the ins and outs of oil catch cans and oil breather cans.

There was also a thread here recently where someone had a similar issue after putting on a new can and using wrong size hoses.

I think that thread started off saying “hi flow turbo blown” or something (because of the white smoke)

Even after fixing, there was a bit of smoke as the extra pressure had pushed oil past the turbo seals and so forth and was burning in the exhaust for a bit.

Hope that is all you have done and that nothing is broke.

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