Oil from turbo pics please advise

[Spittinflames]

As titled really.... Came back after the sunday meet in stoke to find oil seeping from the pipe coming from the turbo.... Just took it off and this is what a found:-







So why's it doing this.... is it looking a bit sad? I hope not but got a feeling this is not going to be good.

The cars still under warranty so please give me your honest opinions and i can get on the blower and see if they will sort it out. But im not sure weather it will be covered.

Cheers
Lee

[JJ]

If you check the hose going to the compressor.. you'll probably find the route of the problem.

Looking at the colour of the inside of the pipes... its crankcase vent... if it was the turbo.. it would be fresh oil being pushed through.

Basically the vent from the cam cover goes to the intake pipe of the compressor.. when the turbo spools up, it pulls outside air through and the gasses formed internally of the engine ( gas blow by etc ).

Its this vacuum created in the compressor intake pipe that allows oil particles to be pulled through. In a nut shell... if you plug the intake pipe and vent the PCV vent from the cam cover to atmosphere, then fouling of the internals should be drastically reduced.

Thats the cheapest method, the other option is to fit a Oil catch can in that loop... its simply a Pee trap in that very pipe.

If the oil fouling is still there, then it'll be the compressor on the turbo passing slightly. Not a major concern, you just need to keep a check on the oil level.

The turbochargers work on a thrust bearing principal... it relys on the turbo shaft "floating" on a collar bearing ... because of this, its normal for oil to be pulled through to the intake.

hth

ps. Is that dump valve a PITA at high engine loads when backing off slightly... engine buck about = uncalculated air being drawn in - drawbacks of fitting a atmospheric DV on a air flow derived efi system.

[Spittinflames]

Thanks for the reply JJ. A little confused as to which pipe your on about blocking off and which venting to atmo. There is a pipe thats already been blocked off with a cap. I'll put a pick up of my engine bay tommorow, if you could take a look at it and just circle the pipe your on about that would be great, If you havent the time dont worry about it.

Thanks again
Lee

[Ian Geary]

Hi Lee,

this pic has been floating around on the net for a while now, thanks to some kind chap who annotated his engine.

Anyway, the pipe you want is labelled "positive crankcase vent (PVC)".

As JJ described, it allows oil vapour to be recirculated from the cylinder head into the air intake.

But the turbo on full chat is going to be positively sucking vapour out of the engine, and deposit it in your turbo piping.

Disconnect that pipe, and plumb in a vent like this from MotorWorld onto the side coming from the engine.

http://www.motor-world.co.uk/show_prod.php?prod_id=7401

(but I apologise for this being a MaxPower one.) Bung up the side into the air intake, as you don't want unfiltered/ unmeasured air being drawn into the intake system.

But,

as your car is under warrenty, it might be worth doing a compression check to ascertain the state of your pistons.

Like yours, my car was accumulating loads of oil in the air pipes - coming from both the turbo and a cracked piston ringland.

Whilst a "certain" amount of oil vapour is expected from the PCV and turbo floating beaeing, worn rings or valve seals is something you don't want to live with if you can get it looked at.

The BGB gives a guide how to check compression, as well as expected compression values.

hth

Ian

[Spittinflames]

Hi Ian.

Thankyou for the advise it really is appreciated. I'll do as you say and see if it helps reduce the oil a little. I will also do the compression test as advised. I'll let you know how it go's.

Thanks for your help and time

Regards

Lee

[Spittinflames]

Just a quick update, I have fitted a filter to the PCV and bunged the other end.

Ran it for 2 days now and all seems to be well.

Thanks for the help guys.

=D>

Lee

[liberty]

Any chance of a pic of ur engine with filter in place? Cheers.