I have a question for anyone that whats to help out I changed my spark plugs this past weekend and their was alot of oil on the 3rd and 6th spark plug hole, what does that mean and what should I do to fix. I have a 2004

 

What did those plugs look like vs the others? Are you burning/using a lot of oil?

 

if memory serves correct those are the ones that are the biggest pain in the *** to change, nearest the firewall? if so its possible the p.o. didnt change them and they are older than the rest

 

The other plugs where clean it was just the number 3 and 6th plug drenched in oil

 

But even if they didn't changed them would they still have oil on them, I mean I have seen a normal used plug before and the #3 and #6 plug was full of oil.

 

you need a new gasket and valve cover. common problem.

 

THank bro I'll look into that do you happen to know how much they run for or where I can find the right one

 

https://my350z.com/forum/engine/5449...ve-covers.html

check this product out, I just ran into it.

 

I had the same problem. I changed both valve cover gaskets and rtv sealed all spark plug tubes. I checked spark plugs a week later to find out if rtvs hold well. It was fine. Im not sure if rtvs still holds well after 2500 miles into it, but i really dont care to be honest with you. My car feels and runs great and there are no abnormal signs such as misfire or poor gas mileage.

 

I have a set you can buy. I replaced my valve covers to CF wrapped ones.

PM me if your interested. I have done the valve covers on 2 Z's now its a fairly simple job to DIY

 

Oil is entering the combustion chamber:

Piston rings or cylinder walls are worn.
Excessive clearance in the valve stem guides
Worn valve stem seals.

 

thanks you guys I'm going to look into it what should i start feeling in the car when it gets worst? Or what are the signs when it about to give out?

 

Performance deterioration is so gradual that you may not notice. You may see black smoke from exhaust. A compression check will verify which if any cylinders have a problem.

 

If oil is leakin' into the cylinder then you should be having a puff of black smoke at start up and then clear up like a bad valve would do. If its leaking bad then you would be having smoke most all the time.

 

I doubt shops would do that. Plus, the spark plugs are not difficult to change at all. I wrote a DIY on this a while back and haven't had a single person run into any issues during the change.
This.

 

Sucks that Nissan designed the valve covers in such a way that you cant even replace the seals.

 

I was pricing the two valves, and its going to cost 180.00 each one the problem will be replacing them. Thank Nissan for making so hard!!!

 

Its not that hard of a job to replace them. I did mine in about 3 hours working slow taking my time and drinking beer with my brother.

 

You read my mind bro sound good, Where you having the same problem?

 

No I swapped mine out for CF Ones