White deposit on oil filler cap

[Vercingetrix]

Hello

 

I've been looking to purchase an XK8 and viewed one recently.

 

I unscrewed the oil filler cap and found a pale white greasy substance on the underside.

 

The oil on the dipstick is clean and clear and smells fine.

 

Suspecting it may signify a head gasket problem, I mentioned this to the seller, a Jag main dealer who said he would ask their head technician.

 

Took the car for a test drive, had a look again at the filler cap underside and it was completely clear.

 

Oil pressure was constant and good as was the temperature.

 

The mechanic arrived, had a look and said he suspected it was simply condensation as the car has barely been used other than ferrying it a short distance to and from the workshop for various jobs.

 

The car seems well looked after and comes with a two year guarantee on a forty five thousand mile car.

 

What do members think? Do you think this could be a head gasket problem on the make and would you go ahead with the purchase? Or could it be simply condensation or something else?

 

Your opinion would be appreciated.

 

Regards

[Old Peter]

Hi David,

 

"Mayonnaise" on the oil filler cap is something us older drivers have seen before.  I have had it before on a Viva HC which my wife used for short trips.

 

It is probably condensation build up, but if here is no oil in the coolant I would not think it too dangerous.  It was in the VIVA for 8 years without a problem.

 

Regards,

 

Peter. 

[Vercingetrix]

Thank you Peter for your response.

 

It's just a concern for me with that big V8 there and the possible problem I'm imagining

 

Regards

[Vercingetrix]

Thank you, Jim for your words.

 

I too am thinking the mechanic probably had it right and as you say, if the dealer is prepared to stand a two years guarantee behind the car, it's probably not something to worry about.

 

Thank you Jim, I appreciate your taking time to respond.

 

Regards