awd-rwd racer

iTrader: (16)

i have what looks like oil on the intake side of my heads. i dont have any pcv valve or anything going from the valve cover back into the intake so i dont under stand how anything would be there. pics below

98RedBird

iTrader: (77)

First off, how are you venting, feeding fresh air into your crankcase?

awd-rwd racer

iTrader: (16)

breather on both sides.

awd-rwd racer

iTrader: (16)

pass side


driver side

98RedBird

iTrader: (77)

Did it run with a PCV setup in the past? If so how long has it been without and how long did it run with it?

Could just be left over from the old setup, unless you've had the intake off and cleaned everything out since you swapped over to the breather setup, then obviously it's coming from somewhere else.

Are they aftermarket heads?

Are you supercharged/turbocharged? Or just the N20?

Honesly, not to change the subject but you'd really be better off with an LS6 PCV setup with a catch can if you're not running boost at all. Breathers are usually used more in boosted apps than N/A apps.

awd-rwd racer

iTrader: (16)

i dont know if it was used with a pcv system in the past i bought the engine used with 40k~ miles on it. it came with everything but no pcv system. im in the process of going turbo right now. so i guess im good with the breathers. is there any other reason it would be there? rings, valves, ect? i did spray the car 4-5 times. but ive since sold the kit. ive driven the car with this engine for about 4-5k miles total

thanks for the help btw

98RedBird

iTrader: (77)

Yes, rings/valves/valve stem seals could contribute to it, but I wouldn't really jump to that first. I would clean everything up, clean the intake out, get all the oil out, run it for a while, pull the intake back off and see if it's accumulated oil again. Intakes are EASY to pull on those cars anyways.

My bet would be it's just left over from previous miles with the PCV hooked up.

If it does accumulate oil again after everything is cleaned up, do a leakdown test and make sure the cylinder's are in good shape and it's not pulling oil up past the rings.

But like I said, that's unlikely so I wouldn't jump at that first.

Stock or aftermarket heads? Reason I ask is because stock casting heads that have had the intake runners ported out have a tendancy to leak oil down into the runner through the rocker stud hole. Some thread sealant solves that problem.

awd-rwd racer

iTrader: (16)

stock 241 heads. unported as far as i know.

awd-rwd racer

iTrader: (16)

before i took the car apart for the winter, my oil pressure was like this at idle


and i did a compression check (one of the guages that screws into the spark plug hole)
results:

Firewall

180. 175
175. 170
172. 170
165. 165

Front of car

98RedBird

iTrader: (77)

Oil pressure looks fine for idle. Was the compression test done with the car warmed up or cold?

Those numbers don't look bad, a little on the low side for an LS1 though. The motor is untouched right? Stock CR? Most LS1's that I've compression tested were in the 185-210 range. You could always do a leakdown, they are far more telling anyways as far as what shape your motor is in. Compression test just tells you uniformity or if you have a dead hole.

Anyways, like I said man, I'd just clean it all up and run it for a thousand miles or so, or even through and oil change interval and then pull the manifold back off to see if oil is accumulating again. I'd bet the PCV system was run in the past and the oil you're seeing is from that.

awd-rwd racer

iTrader: (16)

engine was cold during test. again thanks for the help

98RedBird

iTrader: (77)

Yeah, I would say those numbers are alright then. You'll gain a little bit of compression when it's warm, and the cylinders usually will be much more uniform. Suppose to do them with a warm engine.

Anyways, yeah, just clean it up and see if it comes back or not.

9Green-Z8

iTrader: (18)

so what problem did you find with your car man i would like to know

9Green-Z8

iTrader: (18)

i had a similar problem with my lq9 block i had oil in my intake alot but i cleaned it and had alot of oil in it again and recleaned and rechecked and again alot of oil until my engine just lost power remove my engine and i had bad rings

ReedBooth

iTrader: (1)

They all have a tendency of blowing oil in the intake, more or less, I wouldn't worry about it unless you have a smoking or oil consumption concern. Otherwise, run a catch can and call it a day.