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

    • I usually source pressure on inlet manifold after throttle body
    • Where is the best location for boost pressure source when running mac 3port boost solenoid?  my new turbo does not have a fitting for that on the compressor housing.  how come Garrett make a turbo without that?  im confused 
    • From my memory, which isn't that great, we did have issues getting the large throttle body on my old LS1 to play nicely at idle, first it would stall, then it would only idle at 2k rpm, then it would hang at 2k rpm for a few seconds and then drop and stall, then, finally, the best we got was it would hang at 1.5k rpm for a few seconds then drop to around 800 rpm The tuner stated that large cable throttle bodies are a PITA, and if I wanted anything better than what we ended up with I would need a electronic throttle body and all of the aftermarket ECU stuff to run it
    • So, my intake arrived  I'm not happy with the coating finish so I went to Supercheap and got some black wrinkle paint and some prep stuff I was initially thinking about using grey wrinkle paint, but finding a quality product that gives the texture I want was "unfindable...", so the tried and tested black wrinkle paint is again finding its way into the engine bay for the OEM look I'll sneakily head into work and get the big ovens cranking to cure the paint over the next week or so I've also contacted MX5 Mania today to talk about the install and tune, so painting it is my "main effort" prior to sending the car off In other news, the correspondence from the US supplier is fair to midling to say the least, I'm still trying to track down the intake box thingie with the larger intake pipe to suit the throttle body, it still is "awaiting fulfilment" (no stock currently available), if it isn't here soon I'll just get MX5 Mania to fabricate up a CAI that is easy to service the air filter  
    • Thanks mate. I thought it would be that way.
×
×
  • Create New...