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Posted 26th May 2020
Hi all,

Serviced my car yesterday and when I went to change my spark plugs I noticed there was a buildup of oil at the bottom of the spark plug well in the hole for the 4th piston (right most plug. I think that’s piston 4(confused) ).. the rest were dry as expected

I have a 2008 Vauxhall Astra 1.6T (Z16LET)

It seems quite excessive.. could it possibly be a valve cover gasket? If so, how much would it cost to repair?

Or could it be something else?

Not should if I should be very concerned.. the car is running great(shock)
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