Oil on the spark plugs
 

Hello,

I was changing the spark plugs on my 89 Turbo and i realized that they had oil on the base (the are of the spark plug that ignits the fuel inside the combustion chamber), the first thing i thought was piston o-rings, but i did a compression test and everything was fine.
What can be the cause of this oil on the combustion chamber??

Thanks for the help!

LR

The valve cover seal get old and start leaking down to the spark plug. Then when u remove the plugs the threads and bottom get coved in oil. Check that black cover in the middle to that leaks to from the big 14mm Allen bolts.

I made a cheap tool to tighten down the 14mm allen center galley plugs. I used a 14mm bolt head
in the allen hole and 2 jam nuts tighted together on the threads. you just need to get a socket over the top jam nut to tighten. use decent quality material or else it could break / strip the threads. To sop up the oil with the spark plugs in I used a bent nose pair of tweasers to hold a patch of paper towel.

See the thread in the FAQ section for detailed information on the topic, including pictures.