vics350z

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

ronn1

iTrader: (1)

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

DB350

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

vics350z

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

vics350z

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.

Entaille

iTrader: (16)

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

vics350z

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

Entaille

iTrader: (16)

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

check this product out, I just ran into it.

hyuk28719

iTrader: (3)

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.

Barnabas

iTrader: (15)

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

davidv

iTrader: (2)

Oil is entering the combustion chamber:

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

vics350z

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?

davidv

iTrader: (2)

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.

Goble

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.

3hree5ive0ero

iTrader: (95)

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.

350Zdj

iTrader: (3)

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

vics350z

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!!!

Barnabas

iTrader: (15)

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.

vics350z

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

Barnabas

iTrader: (15)

No I swapped mine out for CF Ones