oil from filler cap

Hi. may have a bit of problem with
BMW 2.5 deisel engine
full service history
128.000
2001 model

Noticed today a bit of oil from the filler cap , Not noticed it before.

Could it be that there is a blocked breather or is it first singe of the crankcase pressurizing .

Thanks in advance
Colin..

Maybe the PCV needs cleaning out in the cam cover. There is supposed to be a constant depression or partial vacuum in the crank case on all EGR models. Or maybe the cap seal has just gone hard.

Hi Wammers.

Sorry i am a bit thick , what is a PCV

Colin1 said:

Hi Wammers.

Sorry i am a bit thick , what is a PCV

Click to expand...

Pressure Conscious Valve. Maybe the rubber seal has just lost it's flexibility. Lots of oil is slung around in there it will weep out is the seal is not good.

"Pressure Conscious Valve."

Course it is how silly of me .

No seriously now, Many thanks mate will take a look into it . A lot cheaper fix than i thought it may have been . Lets hope !!

many thanks again mate

I always thought it was Positive Crankcase Ventilation valve......or is that petrol only??

Saint.V8 said:

I always thought it was Positive Crankcase Ventilation valve......or is that petrol only??

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Read emission control diesel.

wammers said:

Pressure Conscious Valve. Maybe the rubber seal has just lost it's flexibility. Lots of oil is slung around in there it will weep out is the seal is not good.

Click to expand...

Proof at last that the P38 is a conscious sentient being

Datatek said:

Proof at last that the P38 is a conscious sentient being

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It is indeed as far as crankcase ventilation is concerned or at least it is if the PCV is not clogged up with ****.

Must check mine on the next service.

Datatek said:

Must check mine on the next service.

Click to expand...

PCV (Positive crankcase ventilation) system. Is controlled by a PCV (Pressure conscious valve) hence confusion.

Ahhhh....hence my confusion!!

Saint.V8 said:

Ahhhh....hence my confusion!!

Click to expand...

Also called a pressure regulating valve. But you can have one of those in the braking system. Or a Pressure conscious valve there also. So it depends on which end of the piece of string you have hold of at the time i suppose.