question on spark plugs??

[Mark_F]

i have '89 Supra, non-turbo,automatic. when i open my spark plug wire to check my spark plug i realize that i have motor oil all over my spark plugs. why would this be happenin'??

[VincentV.]

Welcome to the crappiest valve cover bolt down system from Toyota!

your valve covers are probably needing to be tightened down... there are 6 philips head screws on the covers.

be sure to clean out all the oil, take off cam covers and apply some gasket maker on the cover seals. if you don't clean up the whole thing how are you going to be 100% sure that the covers were the problem?

i'm about 85% sure they are the deal, you're going to have to take off the throttle body to do this but that'll only take 10 minutes.

[Mark_F]

thx!!

[mike787]

I had the same problem, the valve cover screw jut keep vibrating lose. I just keep tightening them down periodically!