Guys..need some advice hopefully from someone who has been here before.
A friend has a 2004 535D, which has, I think, a few faults....
It has been into a local BMW "specialist" and they said it needed and engine, but I dont think so (and who am I to question!),
So - a few observations...
It smokes really badly when first started and for the first few minutes, then is fine all day long.
If you remove the oil filler at any time, you get a column of smoke out like a chimney.
The vacuum pipes from the "vacuum manifold" over to the pressure converters, reservoir and turbos etc were all changed by me as the pipes had perished, and even left disconnected by whoever last looked at the car (they had even plumbed it wrongly when they clearly took it apart to test!).
I have tested the pressure converters as best I can, and they appear ok.
Replacing the pipes helped the idle smoothness, but there is zero low end grunt. When the second turbo comes online, it goes as it should.
The only code present is 4530 which is "charge air pressure small turbo control deactivation" there are no check engine lights or idrive errors.
The error would explain a lot as there is no low end grunt...
So... smoke - I have suggested the crankcase vent is checked and changed (if it needs it) and also the diaphragm valve that is beside it, although I am sure if it was split the idle would be rough, which it is not, its actually perfectly smooth. Is there anything else I should check?
In terms of the small turbo, the actuator seems to hold vacuum ok, and the pipes as I said have been replaced. I have not replaced the egr (nor checked it) or the swirl flap plumbing. I am assuming that if the big turbo is working, which it is, there is plenty of vacuum so "that side" of the engine plumbing is ok.
Other than if the small turbo actuator is actually leaking, anyone any ideas!?!?!
I have not had it up on a ramp yet...could there be any turbo air plumbing at fault? I did not think it was likely when the big turbo was making power without issue.
Anyway...rabble over...all help or advice most welcome.