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Oil On Spark Plug

Oil On Spark Plug

Postby Bartok2WTM [OP] » Apr 14 2020, 12:45am

I have a '07 Classic 5.3, motor was swapped a few years ago and only has 50k on the motor. I went to change the spark plugs and noticed there was oil on cylinder 2, 4, 6, and 8 plugs. And I can see oil sitting where the plugs go into the heads.

I was reading it could possibly be as simple as replacing the valve cover gasket so I went ahold and got those. But I have yet to do them. I know they are simple to replace but I was wanting to get another opinion.

I understand there was a revision to the valve cover for the 07-11 or 13 nbs, but wasn't sure if there was a revision to the 99-06 body style.
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Re: Oil On Spark Plug

Postby Walkers » Apr 14 2020, 1:32am

That is the usual culprit. Make sure the flange on the valve cover is straight before bolting them back on.
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Re: Oil On Spark Plug

Postby GBSierraSLE » Apr 14 2020, 2:11am

Yes, swap out the gasket. And the revised driver's side valve cover only applies to '07.5-'13 motors.
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