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Need To Fix My Oil Smoking Problem Guys.

RaZ_TuRbO
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RaZ_TuRbO Community Regular

RaZ_TuRbO

Posted
Posted

So i have a weird situation with my rb25 engine...

I think i have rounded it down the engine rings or turbo failure, but then again ive been wrong before, symptoms are;

It blows oil smoke(yes it is 100% oil smoke) after about 2 mins of driving, no massive embarrassing plooms but enough to be embarrased driving in mild traffic. There is no oil in the intake piping at all near the compressor or intercooler. I have a catchcan with blocked off pcv valve to plenum..catch can is venting to atmo... so there is no oil going back into the intake.

After hardcore drives the catch can fills about 30mls, but that could be becuase i still have rb20 rocker covers??, although i do think the engine is a little tired..

The car itself cranks over perfect.. cold, hot whenever and idles great no smoke. It is only when the car warms does it blow smoke..the worst is when just taking off there a ploom then it seems to go away, then when its boosts its back again, and if i give it full boost hard i can see it on the backoff.

I personally think a rear seal is goone in the turbocharger and there seems to be a more than usual amount of shaft play(its a bush bearing highflow), as i think i can see small burring on the compressor fins, and is a bit shiny where its been ever so slightly rubbing. Thing is, ive only had this turbo rebult in the last 7 months...which sucks.

The thing that stumps me is the intake piping is clean, if it the bearing it gone it usually leaks both sides right??

helpy??

cheers

Raz

nizmonut Community Regular

nizmonut

Posted
Posted

probably a combination of both, those factory turbo's last about as long as the time the engines due for a rebuild. give or take a few 1000 k's

it doesnt cost much to give a block a hone and face or the bearing's either, it's the turbo that is going to set you back.

if it is the turbo seal you have to remember the longer it is driven the more oil it is going to spill down the exhaust,

so it is a compounding factor that it will only smoke more as the oil builds up in the exhaust,

even after you have found and fixed the issue you may find the smoke is still there for a few days untill the oil is burnt out of the system

RaZ_TuRbO Community Regular

RaZ_TuRbO

Posted
  • Author
Posted
I wouldnt say a few days but yeah

I think i wrote in the post, but the turbo is only 7 months old, its a highflow bush bearing with steel wheels..still has warrenty, and will be the cheapest option for the time being..since its still under warrenty.

cheers guys

judd33 Collaborator

judd33

Posted
Posted

you cant just guess, you have to look at a few things to be certain!my has same problem,i changed turbos to a highflow,and the problem was still there,oil coming out the bleeder and oil in the intercooler pipes,find out it was the valve seals,in the process of building a strong rb30 bottom end with rb25 head!

T04GTR Grand Master

T04GTR

Posted
Posted

ok dude. you need to see if there is any back and forth movement in the turbo. not up and down. very common to have highflows shit a thrust bearing if still using standard oil lines and banjo bolts.

30mls is nothing to write home about. the symptoms you are describing is valve stem seals or turbine oil seal.

just check the turbo again and let us know :down:

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