Hello im looking for some help. I have a Sierra cosworth track car that smoking on boost and when I lift off. It already don a turbo when seals went. Has a new Built engine that has 500 miles don. It has t34 whit wrc high compression pistions and high pressure oil pump. Is the oil feed to strong to the turbo.

 

Valve seals, get the head looked at mate.

 

The reason I say that is there's a lot of dodgy valve deals kicking about that are not genuine.

Just double check where the parts were from

 

Thay were all main dealer valves. I still think its something to do whit oil presur because it gets wet whit oil on the down pipe of turbo and manafold. It don 2 turbos so far and have it rebuilt for the 2 time. Should I put a oil restricter on it from 3mm down to 1.5 or will it be to small for oil feed for turbo.

 

Do you got a gasket between the turbo and return to the sump ? There the manifold and so is wet or is it restricted and the oil cannot go any were ?

Also good to ask is if there was a special ring put on the shaft of the turbo to stop leakage on high boost ( done on rallye turbo's ) there I had this on my stage 2 , reduced oil consumption also

 

John ,

I think high pressure oil pumps are proving to be more trouble than they are worth, even the proper cosworth ones are giving trouble from what I'm hearing.are you using genuine filters as well.what brands the oil pump and matched to block type 205/200???

For ref what idle pressures you seeing hot/cold ??

 

do you have an oil pressure gauge?

 

Just thought , have you a genuine braided oil feed from block to turbo as it has a restricted flow I think.if a normal hose used it may over supply ???