Oil fouled plug in cylinder 2

halvorsenb · Post by **halvorsenb** » Tue Feb 11, 2020 1:11 pm

When I changed the spark plugs on my 95 na z32, 5 of them looked like the one on the left, and the plug from cylinder 2 is the one on the right. Clearly it's got some oil fouling, just wondering the best way to proceed.

Thanks.

Post by **PapaSmurf2k3** » Tue Feb 11, 2020 6:54 pm

Hey welcome to NICO!
Typically a plug that looks like that either has a bad wire/coil going to it, or has a leak somewhere, like a leaky injector or a valve cover gasket that is leaking oil down in there... or a piston that has some bad rings. You'd probably see/smell blue smoke out the tailpipe if it were the piston though.

I'd replace them and check it again in a thousand miles or so. Does it still run fine?

halvorsenb · Post by **halvorsenb** » Tue Feb 11, 2020 7:16 pm

PapaSmurf2k3 wrote: ↑
Tue Feb 11, 2020 6:54 pm
Hey welcome to NICO!
Typically a plug that looks like that either has a bad wire/coil going to it, or has a leak somewhere, like a leaky injector or a valve cover gasket that is leaking oil down in there... or a piston that has some bad rings. You'd probably see/smell blue smoke out the tailpipe if it were the piston though.

I'd replace them and check it again in a thousand miles or so. Does it still run fine?

Yeah it doesn't seem to be causing any noticable issues. I'll have to check for smoke next time I start it up. Thanks for the reply!

Post by **PapaSmurf2k3** » Tue Feb 11, 2020 7:45 pm

Good luck. Let us know how you make out.

Post by **NolimitZ32** » Wed Feb 12, 2020 8:13 am

Those also look like the wrong plugs for the VG, supposed to be extended.

Oil fouled plug in cylinder 2

Oil fouled plug in cylinder 2

Re: Oil fouled plug in cylinder 2

Re: Oil fouled plug in cylinder 2

Re: Oil fouled plug in cylinder 2

Re: Oil fouled plug in cylinder 2

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