Turbo smoke

[MatS]

When I bought my car last year, it blew a nice puff of smoke out the back after it had been sat on idle for a while. I got some replacement valve steam seals from meek and popped them in. All was good, no more smoke.


Some 8months down the track, I have a similar issue. If i leave the car on idle for longer then say 15sec, I get a big cloud of smoke out the back (including while on idle). The smoke will continue until i come on ~10psi of boost usually.

The turbo on the car is a Std bearing Turbonetic T3/T4 hybrid, although I’m a bit dubious on authenticity. I noticed there was a leak of oil coming from the top of the turbo (oil feed line, feed from head) and have since fixed that up with a new hose/fitting. If read that running a std bearing turbo oil feed off the head can lead to some over pressure dramas, but nothing definitive about this.

I pulled the rocker cover breather lines off and ran them to a bottle w/steal wool (diy style ) for a few weeks and there was minimal oil in the bottom. still waiting on my more permenent oil/air seperator setup to be finished.

Anyone had similar issues with turbo and smoke or should I get some more valve steam seals? It is definetely an oil burning issue from smell and top ups required :thumbsdown:

 

[Missile]

http://4gtuner.com/site/showthread.php?t=14845

see last page for solution...

 

[MatS]

Not sure how i missed that post, spent this morning searching the forums :huh:

I'll give that a try this afternoon and see what the deal is.

 

[steve]

A properly performed leak down test might tell you if it's the stem seals, and can tell you if it's the rings. Otherwise, pull your turbo off and check for an oily residue inside your exhaust manifold runners - if they're dry (and there is an oily residue caked to the sides of your dump pipe), then the oil is almost certainly from your turbo.

 

[VR-4Squid]

Also, it's ball bearing turbo's that need restrictors in the oil feed line, not plain bearing.

 

[steve]

For some ball-bearing turbos on these, the opposite can be true too - that the oil feed off the head doesn't supply enough oil to lubricate the cartridge. There was a bunch of SCM61s that failed because of this - the solution was to take an oil feed straight off the oil filter housing.