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Mileage?

Is it a tuned car?

Does the car still have the original turbos? Try removing the turbo-inter cooler hoses (with an oil catch tray under them) - if there's anything more than a little oil inside the hoses then you could be looking at a worn turbo. My car is a 2008 with similar miles and both turbos were leaking oil almost as fast as I could add it.

Ogi's right... i'd suggest to check it all over by RS specialist. They are best placed to comment on issues that are beyond DIY knowledge and that doesn't come up as error on diagnostic tool/s.

Re latter, it may be worth scanning the car to check for error (but i doubt that oil leak will come up as positive).

Keep us posted how you get on.

Do you cool the car down when u turn it off? Is it drinking oil? And does it smoke when u put your foot down?


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This sounds like a one way check valve failing or the pcv system.

On my car 2 of the 3 non-return valves in the breather system had failed.

Jim Haseltine wrote: ↑

Thu Feb 06, 2020 11:09 pm

On my car 2 of the 3 non-return valves in the breather system had failed.

those under the air filter assembly Jim?

Yep. The left and right Items 1 on https://nemigaparts.com/cat_spares/etka ... 41/103500/ the central one was ok. If replacing them take note of the flow direction arrow on the valve body.

Cheers Jim.

Easy to replace?


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The one for the right bank (under the PCV unit) wasn't difficult, the one for the left bank was awkward and the centre one (which I removed to check) was almost impossible. The breather/vacuum pipe assembly which it fits to on my car was brittle (and not cheap) so take care.
I've got this nasty thought at the back of my mind that I might not have fitted the valves the right way around - I'm sure they're correct but to settle my mind I'll have to take a look at the weekend.

Cheers Jim.

Other than smoke on start up or while accelerating, any other symptoms that failed valve does?


Rgds


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Couldn't say, but I doubt that it's good for the oil breather system.
It's a balanced setup - at idle/light throttle there's lower pressure in the inlet manifold than in front of the turbos so the fumes that have got past the coarse and fine separators are sucked into the inlet manifold. When the throttle is open there's higher pressure in the manifold than in front of the turbos so the fumes are sucked into the front of the turbos. In both cases the fumes end up being burned in the cylinders, it's just the route they take to get there that varies. As both turbo non-return valves had failed on mine there would have been air being sucked from in front of the turbos directly to the inlet manifold - off the top of my head I'd expect that to result in the engine running a bit lean.

*All that is qualified by it being 11pm and I've downed a good half bottle of red so my logic might well be on it's head.....