got a quick question... about the PCV system

[E-Rue]

im getting oil down the right side valve cover, and a lot on the bottom of teh truck and lower motor. at first i thought it was a bad seal on the rear of the intake manifold, but now im not so sure.

so my question is......
i see some oil coming from where the pcv tube goes into the valvecover. i dont have the pcv that operates under vacume hooked up to the breather. i only have the other one hooked up. (the one that goes directly to the intake itself) could the block be getting pressurized and blowing oil out thru the pcv opening in the passenger side head? i gotta figure out this oil leak its driving me nuts. thanks.

e

 

[leroy]

The breather would be the only place for the crankcase vapors to go when you are under boost. The check valve in the single pcv valve would close under boost. Consider hooking the other pcv valve back up.

You could also switch to a breather on both sides, but you would probably just have oil running down both sides then. :lol:

Moroso makes a fitting that is welded onto the exhaust, and drafts oil vapors into the exhaust.

Jim

 

[myclone]

Remember me grumbling about what I think is causing this situation (like I dont grumble about everything.. ). Oh well, thats a subject for another flame fest thread..

Anyway, so ya got one PVC hooked up.. It goes into the intake between the filter and turbo? That might not be enough vacuum. Try re-installing the PVC with the check valve and plumbing it into the the intake manifold. As long as its after the TB it'll get max vacuum which will stop the oil puking.

Now the bad... The above will eventually crud up your intake manifold and the back side of the intake valves like he stock system does. Prolly lower the octane some since your engine is now ingesting a steady diet of oil vapor.

 

[E-Rue]

im gonna give the double breather a shot, but im thinking its the fargin intake manifold leaking from the rear.



e

 

[jwaller]

plumb both valve covers to a catch can with a difuser and be done with it. no mess and all the venting you want. if you want fancy then hook a vac pump to the can....

 

[Matthew Little]

leak

leak

My truck has the same prob. One of my friends had it on his s-15 and come to find out it was the seal on the distributer. Leak from the upper rear of block,he thought it was the valve covers. Found it with leak die,may want to check that I have to on mine.
Thanks,Matthew

 

[myclone]

im gonna give the double breather a shot, but im thinking its the fargin intake manifold leaking from the rear.



e

This just coats the entire engine compartment with a nice film of oil.. Do the catch can thingy and save your sanity. But...... if its the intake then its an easy fix. Yank the intake clean the surfaces, use Great Stuff on the end gaskets, reinstall intake, youre done.

 

[MikeRenz]

browsing around i found this. Could be helpful to keep shit clean

 

[TurboManiacal]

Thinking about the first (not popular idea) of plumbing it into the intake...what about that port that you (E) told me about was from the old F-bodies...would that work for that purpose?

Is this only something effecting E as his truck is highly modified or am I going to experience this in my stock truck (I have the K&N breather).

 

[E-Rue]

well my oil is coming from the passenger side valve cover. the intake is sealed just fine. it runs down the groove in the plastic vortecs, and then spatters everything on the way down over by the down pipe. unfortunately i had to take the upper and distributor out to make sure nothing on the back (intake/distributor) was leaking. im pretty sure its blowing oil out of the pcv port. i hope by reinstalling the second line in the breather this problem will go away. ill let you know. im a little unsure how the system works exactly, but both PCV's are new, and the only difference now, is that that tube isnt hooked up. i looked in my head drains, and they are clear. im not sure why its doing this, but im gonna fix it one way or another, if i have to plumb it into the fucking downpipe.

e

 

[ed hess]

e
if i understood correctly you had only the one pcv in the pass side cover and you werent using the tee.

Initially i was seeing oil on the starter. I even thought i had a bad head gasket. but i found oil on top of the rear half of the pass side valve cover.

ao anyway, Mine was this way in the beggining and i put the tee back in with the 2nd plumbed to the intake before the turbo.

no more oil dripping down to the starter.

i know its getting sucked into the intake but until i see how a vacumm pump would get plumbed into the system i dont know what else to do.

I did briefly look at the belt driven vac pump from moroso but i didnt do more than look.

hth

 

[E-Rue]

i have a completely stock setup, (both PCV's installed with the T) but the hose going to the airfilter was just laying there disconnected. not sure why im getting oil from the PCV port on the valve cover, but im hoping that reinstalling that line will solve the problem...... never had any problems with it previously. im waiting on a upper to lower intake manifold gasket from NAPA, and i should have it back together by saturday afternoon. ill let you know what happens after i drive it around tuning it this weekend.

e

 

[GEN3Typhoon]

I had the same problem.

I bought that kit for putting them into the exhaust. I installed it about a week ago and now the valve cover are completely dry.. works great and all for about 32 bucks.

Of course I had to weld one of the bungs into the DP, but not a big deal.

 

[ed hess]

since i have a 2nd bung in the dp for a wbo2, (but i think i dont need the other once the wb02 goes in) how does the hose attach to the hot dp?

any info like part numbers for this? source?

I hate the idea of sucking oil into my new motor!

ed

 

[Loeryder]

it needs to be way downstream of your O2 sensor or its gonna get coated with oil.

Basically its a metal tube that welds into your dp at an angle so that when the exhaust rushes by it creates a vacuum and pulls the oil vapors into the DP.
Not sure how the hose attaches to it, but I'd imagine it is steel braided or very high temp hose.

Here ya go

That's moroso # 25900 - the whole kit.

These are the weld in nipples...

moroso # 97810

www.summitracing.com owns joo.....

Hths...

 

[GEN3Typhoon]

Mine is about a foot downstream of my 02... and you don't need high temperature hose.. I used 5/8" coolant line per the instructions. I think I bought the kit for 32 and the hose at advance for another 4 bucks. I used a sinle bung in the DP and then a PVC Tee and hooked them to each other and then into the DP.. like I said no more oil up on the motor...seems to work great.

 

[E-Rue]

hey i like that a lot, but why is there two of them?

e

 

[Tommyquest]

hey i like that a lot, but why is there two of them?

e

normally installed on the collectors of long tube V8 headers

 

[GEN3Typhoon]

I have been impressed with the system.

I was at a local race shop the other day where I bought the kit. I actually bought some different grommets that what the kit had. You can buy the breathers separate so basically you could probably fabricate the bung and don't know if you really need the check valve, if you did not want to spring for the kit you could probably put it together... but for 30 some bucks.

 

[myclone]

hey i like that a lot, but why is there two of them?

e

normally installed on the collectors of long tube V8 headers

Yes thats exactly what is done BUT.... you see them in applications that DONT have any restriction in the exhaust after the evac tie in point (like open headers). You put those in youre exaust anywhere but after the muffler youre going to pressurize the crank case even more. You thought you had oiling probs before.... you install that stuff and ppl will be calling the EPA on your ass due to your truck hemoraging oil out of every orfice.