maXmood

iTrader: (16)

I'm already having a blowby from the pcv and alot of smoke at wot. so i installed a catch can that inlets the pcv hose and outlets to a breather, but still, smoke comes out the breather and some oil still comes out the catch can, even tho the can isn't anywhere near 1/4 full.

today i noticed oil at the coil pack (driver side), even tho i cleaned the area around it a while back (maybe 2 weeks ago).

any idea what could be the issue?

note: i'm SC'ed and running a bit rich, and sometimes cranking up the car takes couple of seconds to get it started. even sometimes it feels like it choks. so i have to let go and reignite it again.

thanks

pic for ref: (i made it as large as possible so you can see the oil)

VQ35deMax

iTrader: (6)

valve covers. typical issue on the vq35.

redman333

iTrader: (8)

I had that problem for years. I never really did anything about it except kept an eye on my oil level and cleaned it up real good every once in awhile.

maXmood

iTrader: (16)

are u guys sure there isn't anything i should worry about????

ZSpeedPerformance

iTrader: (71)

I would replace the valve cover if it were me. If oil gets down around the plug which it probably is it can ruin the coil pack also.

maXmood

iTrader: (16)

^are there aftermarket valve covers for the VQ which are better than stock ones?

maXmood

iTrader: (16)

and why does it blow oil from here? how is that happening? can someone explain this in technical details?

thanks

ZSpeedPerformance

iTrader: (71)

First step would be pull the coil and see if the hole is full of oil.

maXmood

iTrader: (16)

i'll do that over the weekend.. but what if it was filled with oil? what if it wasn't?

dirtbikr

then it is or it isn't?

ZSpeedPerformance

iTrader: (71)

If it is filled with oil replace the valve cover, If it isnt figure where it is coming from. clean and check often to see where it starts from. Some Baby powder in the area will show where the leak is coming from. Clean well and fluff some baby powder in the area you think its coming from, The powder will leave you nice trace marks once the oil hits it.

maXmood

iTrader: (16)

^thanks for the tips.!

ZSpeedPerformance

iTrader: (71)

Another note if you are boosted, The oil can come from the plenum gaskets also, Under boost you can leak and and residual oil in the intake can seep through the gaskets and leak through.

maXmood

iTrader: (16)

^Noted..

Ollie

today, I have changed the spark plugs, without removing the plenum thing. All went good ... just one little thing: cylinder 5 and 6 had oil in these spark plug hole ( it was filled ). 1,2,3,4 are dry

Would you guys realy recommend to change the valve cover gasket ? wich would be a lot of "fun"

Ollie

LMG_35C

From what I've read the valve cover grommets that seal the spark plug chamber can't be replaced seperately. You need to replace the entire valve cover. You'll also need valve cover gaskets and I'd suggest you look into doing both sides at the same time. How many km are on the car? Do search on this site and G35 driver, lot's of threads.

ZSpeedPerformance

iTrader: (71)

Correct, You will need to buy a entire valve cover and new gasket to fix the leak.

Ollie

My Z has 102.000 km now on it. I discovered this leak because of the spark plug change, what's recommended at 100.000 km.

As you suggested, I have read some posts about the valve cover oil leak.
As a start, I will keep an eye on and solve that next spring when it gets warm again

thx, ollie

juelz86z3303

iTrader: (1)

i just did this job the valve cover job iw ish there was a way to change the spark plugh chamber seals but u have to replace the vcas one unit to stop the leaj i heard the local auto parts store sell the seal but i guess it was false they dont so if you can get some from the same year of ur model to the last rev up years whic i think is 07.5 anything before the new 07-08 hr came out ur good ur stock 35 cover may not fit if u get the rev up vc if u have a regular de like me. they wont fit because the rev up have bigger cams for the exhaust and intake due to the vvt on intake in exhaust on the rev up
s. its a fun job and i did my plenum upgrade at the same time . finish miday of saturday to get the feel and it was awsome she felt a lot healthy and my psi gauge was high as hell . lol didnt see it act that way in a while but make sure u plug and plce every thing where it should go other wise big *** ses cel light in yo butt.. have fun enjoy..

ZSpeedPerformance

iTrader: (71)

Somebody send me there old DE valve cover Ill pay $10 for it.