Urgent question/ help - 996 C4S

[Giorginetto]

A good mate of mine got a 996C4S in the UK 80k miles, early 3.4lt model . He mentioned that when he undid the oil cap there was a bit of creamy white mayo sludge in there . is that a reason to be concerned ? what are the probable causes and what can be done about them ?

[rimkah]

was only 3.6 for c4s

sludge normal

[Porkupine]

rimkah said:

was only 3.6 for c4s

sludge normal

I didn't think it was normal...I am sure someone will double confirm though.

[dumpy]

Wouldnt Worry that much. Quite common over winter with all the condensation especially if used for short journeys. More important to keep an eye on the water level if it start to use water then more serious. Head Gasket failure quite rare i beleive.

[Pope]

Normal.

The placement of the filler neck - a relatively long distance from the engine - plastic construction (so it doesn't readily warm up like a metal item might) and low ambient temps all combine to allow water vapour to condense inside the filler neck along with oil and combustion vapours forming the goo. Either clean it out or give the car a long warm run and it will usually clear itself.

[Giorginetto]

Pope said:

Normal.

The placement of the filler neck - a relatively long distance from the engine - plastic construction (so it doesn't readily warm up like a metal item might) and low ambient temps all combine to allow water vapour to condense inside the filler neck along with oil and combustion vapours forming the goo. Either clean it out or give the car a long warm run and it will usually clear itself.

Thanks and thanks to everyone for your feedback. i called my mate and told him all this . cheers all

[monthefish]

As has been said, probably normal.
Tell him to keep an eye on it and be aware of anything untowards in the running of the engine.

[Magic919]

Both mine do it. Ignore it.

[petop]

My 996 C4S does it, in fact yesterday i noticed it whilst topping up oil. Cleaned it off and then took it for longish run, all clear after and fine tonight when i drove from Bournemouth to Aldershot.