Jump to content
SAU Community

Recommended Posts

hey,i have a 32 gtst with an rb25, every time i slow down from boost i get white smoke that puffs out from the exhaust (fair bit)

none on idle or anything only slowing down. from what i know its probly a blown oil seal on the turbo... correct? if so whats a rough price for new seals with labour?

engine specs: standard rb25 turbo running 10 psi, 3 inch no cat, microtec, ebc, 040 fuely etc

also i have a brand new garrett t04 sitting around, would it be better to fit this? i have boch 040 fuel pump but standurd injectors, once again would like a rough price from ur experiance.

sorry to ramble on...

cheers dylan

Link to comment
https://www.sau.com.au/forums/topic/217573-turbo-problem-and-question/
Share on other sites

Don't discount valve stem seals. You need to perform tests to determine which is the cause of your problem.

Remove the turbo and manifold and do a vacuum test on the exhaust ports to determine the condition of the valve stem seals. If they come up ok, then you need to examine the turbo.

I'm not about to go into depth into how you should do this as you won't even have the tools or equipment to test the valve stem seals anyway.

Good luck

sorry mate, it's a harsh reality. Valve stem seals are more likely to leak at negative cylinder pressure as the vacuum effect draws oil through the stem seals. They can weap at idle also but it slowly gets burnt away and not so noticable. On decel, the cylinder draws oil past the stem seal and because you have no real combustion until you resume accel, it will become quite noticeable at this point.

Could still be your turbo but would hate to see you replace it and have the same problem without checking it properly first.

3lit3 is correct, but decel will vacuum suck oil in from a few places, even up past the oil control rings in the bore [although rings usually also smoke after an idle period then accel].

I think you need to determine if the white smoke is oil or water/coolant as well, this could help you determine where to look.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Cam seals go hard. It's a very old car.
    • Also, maybe this is better in General ? 
    • Updated most. I really need to get a crawler to report on all broken links on the site.
    • So my rb is finally having more problems. 2 issues here but I'm here to just to mainly discuss the rattle noise. The other day when I turned on the car and when I take off or go in reverse, there is a temporary rattle noise but when I cruise, boost, idle it's completely fine no rattle whatsoever. I've also done all the servicing, all the health checks you can think of and it all passes with flying colours.  Also the rattle doesn't increase with rpm, it's only at a very certain rpm (slightly above 1,100rpm). My other car also has the same issue every once in a while. Changed the oil recently, no difference. Even took my oil to a lab and everything was quite good surprisingly. Timing belt changed a while ago to. Had the car on the hoist and can't see anything obvious. Tightened a couple of nuts on the exhaust manifold a couple of months ago. 2 different clips uploaded. One of them was supposed to another issue but I'll save that for another time. Thought I'd see if anyone had this same noise before, it's a bit hard to diagnose while it's intermittent. If I'm not mistaken, I think I had this a while back but can't remember exactly. I was thinking if it's doable I'll get someone to hold the throttle cable at 1,100rpm and hopefully it replicates the sound. rb25det rattle only.mp4 rb25det slow start + rattle.mp4
×
×
  • Create New...