I have found that there is a fair bit of oil and dirt in the turbo intake hose, the small section connecting to the turbo. Is this caused by turbo seal failure or is it coming from somewhere else? (PCV changed a few miles ago and i do get some oil burning on tickover)

 

Cheers

It may just need some time to clear perhaps. Let me know how you get on as I also have a bit of oil through the intake piping. Wonder if it collects in the intercoolers ?

It may just need some time to clear perhaps. Let me know how you get on as I also have a bit of oil through the intake piping. Wonder if it collects in the intercoolers ?

 

I'll let you know. The stage i'm at is thinking of removing the turbo to see if the oil seel has gone on it but would rather not as it looks like a PITA as i dont have the facilities to take the engine out and its pretty tight with engine in.

 

Cheers

I doubt if the turbo seal is gone that you would hav eoil on the intake side.

How many miles ago did you change the valves and is the engine modified ?

smithy

I doubt if the turbo seal is gone that you would hav eoil on the intake side.

How many miles ago did you change the valves and is the engine modified ?

smithy

 

Thanks for the reply Smithy. I changed the PCV valves and hoses about six months ago which is probably less than a thousand miles for me. The engine internals aren't modified but it has decat and free flow exhaust, apexi filter and mines ecu running standard boost.

 

It does burn some oil on tickover when you come to the lights if your sitting for a minute or so.

 

Any suggestions will be appreciated.

Modifying the engine can in most cases increase the crankcase pressure in the system, the valves will only do so much and then they tend to clog up.

It's worth removing one or both and giving a little shake, no rattle ? then they are clogged up again, which in turn tends to suggest what i said above.

Am sure there are other causes of crancase pressure build up too.

Being quite new if they are clogged, an airline "may" clear em enough to test my theory.

3 options really if that is the case, 1) the ole catch can which todate i have not seen a 100% version off that no ones slated or 2) Nissan used different valves in different engines, some allowed more pressure than others, i do have the part number for valves which are higher flowing than Z33 ones, which i would expect to be higher flowing than ours which you could try giving their minimal cost and finally 3) if it is crankcase pressure, erm time to strip her down...........

hope that helps

cheers

smithy