[B58-]

Hi all

I've noticed an oil leak on my F31 whilst fitting an intercooler

It's around the turbo oil feed area any idea where it's coming from ?

Also notice oil around the injectors?

The car is a f31 335d xdrive

86k with full BMW service history

Any help
Is appreciated

[Sanjayo1]

hard to tell from the pictures, so I'll let someone else comment.
Curious as to which intercooler you went with though?

[thejeremyman9]

Oil around injectors pretty much has to be VC or PCV. Check spark plug holes also.

Oil down lower could be leaking from above (also VC), or turbo feed/return, which are less common.

[B58-]

Originally Posted by Sanjayo1

hard to tell from the pictures, so I'll let someone else comment.
Curious as to which intercooler you went with though?

The oil can be seen on all the injectors

[B58-]

Originally Posted by thejeremyman9

Oil around injectors pretty much has to be VC or PCV. Check spark plug holes also.

Oil down lower could be leaking from above (also VC), or turbo feed/return, which are less common.

Apologies forgot to state the car is a lci 335d xdrive

[thejeremyman9]

Originally Posted by B58-

Apologies forgot to state the car is a lci 335d xdrive

Ok, but the fact remains that the highest point in the engine is the VC

[B58-]

Update it turned out to be the breather hose on the rocker cover I changed this and all seems fine

It was around £17 delivered from BMW

Genuine BMW Air Intake Breather Pipe Hose Rocker/Cam Cover N47Z/N57S 13717810772

https://www.ebay.co.uk/itm/283812716...mis&media=COPY