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Oil Leaking Onto Coilpacks

Jay11

By Jay11,
in Engines & Forced Induction

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Jay11 Community Regular

Jay11

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My R34 GTT has been misfiring even more since I turned the boost up to 10psi, finally got a chance to take her apart, wanted to check the coilpacks to see if they had any cracks in them.

Found out they a splitfires so pretty stoked about that, but as I started going through each one to check them and also check the plugs I noticed a lot of oil sitting above two of the coils.

post-72359-1278389750_thumb.jpgpost-72359-1278389782_thumb.jpg

Anyone had this issue before? I'm pretty sure it's oil, if it were petrol I would be able to smell it.

And is it safe for me to clean up the oil then take the coilpack out to check the plugs? scared I might get crap inside the cylinder head.

Thanks in advance!

Jaylon.

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Trozzle Grand Master

Trozzle

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Oil in the cylinder head won't be the end of the world - anything that's collected in this oil will be.

Could be rocker-cover gasket leaking....degrease it, hose it out, let it dry (perhaps even assist it with a compressor) then remove them.

Jay11 Community Regular

Jay11

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Cheers,

Got stuck into it again yesterday, I used paper towels to soak up most of the oil.

Looks like the guy that sold it to me lied about putting in new spark plugs just before i bought it haha.

It's so dirty in there I doubt any mechanic had been under there in a couple of years ay.

R3N3 Proficient

R3N3

Posted
Posted
Cheers,

Got stuck into it again yesterday, I used paper towels to soak up most of the oil.

Looks like the guy that sold it to me lied about putting in new spark plugs just before i bought it haha.

It's so dirty in there I doubt any mechanic had been under there in a couple of years ay.

when you replace the plugs, gap them to .8mm (i kow this is right for the 33, not too sure bout the 34) and should help the missfiring. but clean all the crap out before you do the plugs, dont want anything falling into the holes for the spark plugs.

V28VX37 Veteran

V28VX37

Posted
Posted
Found out they a splitfires so pretty stoked about that, but as I started going through each one to check them and also check the plugs I noticed a lot of oil sitting above two of the coils.

...

Anyone had this issue before? I'm pretty sure it's oil, if it were petrol I would be able to smell it.

And is it safe for me to clean up the oil then take the coilpack out to check the plugs? scared I might get crap inside the cylinder head.

Hey mate, I had a similar issue with my R34. It could be the rocker cover gaskets but could also just be spillage from a careless oil change.

I cleaned mine up best I could before pulling the plugs out to prevent crap falling into the cylinders. My plugs are also gapped down to 0.5mm now as my coil packs on their way out, I will regap them to 0.8mm once I get a new set. Some further tips on resolving a misfire here.

Jay11 Community Regular

Jay11

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Thanks, Yer I cleaned it all up pretty thoroughly.

Changed all the plugs as well and now there's no misfire!

The car blew the tiniest bit of smoke from the oil when I first started it but now it's all good.

Half a mission just getting into the plugs tho, I'll check it again in a couple of weeks when I have some more money whether I'll replace the rocker cover gaskets.

RusH_ Veteran

RusH_

Posted
Posted

replaced my own rocker cover gaskets due to a leak, the gaskets and half moon seals from memory cost about $80 all up (both rocker cover gaskets and 2 half moon seals) and its a few hours work if you are comfy doin it yourself, else you shouldn't pay more than about $150-200 for labour if you cant do it yourself

Jay11 Community Regular

Jay11

Posted
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Posted
Before you get all carried away replacing gaskets.....

....a screwdriver is your friend.

Tighten up any loose cam cover screws.

Good idea! I'll check for loose screws, if that doesn't fix it I'm able to replace the gaskets myself.

Yeah they are cheap, but I lost too much money at the casino this pay haha.

Can't wait till tax return, gonna finish off the exhaust with dump and front pipes, high flow cat, and FMIC :D

PM-R33 Grand Master

PM-R33

Posted
Posted

The gaskets will be fine, they are rubber and given the age of your car will still be fine. As has been said, retighten all the bolts holding the camshaft covers on. With heat they tend to loosen a bit over time.

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