My friends little bro wanted me to take him for a ride in the 240, so I thought no big deal I'll impress him a little. Take off down the road by their house turn around to come back and get on it, I'm sliding a little sideways really hard launch. and there is smoke coming out from under my hood I pop the hood and look and it's oil burning on my exhaust manifold. I've been having problems w/ a little oil coming out through a breather that is on the T that is on the valve cover and figured that was it. I got back to my friends house and pull up and there is a noticable about of oil leaking down the side of the engine and dripping off onto the ground. It looks like all of the oil came out of the T that goes off the valve cover. The question is, what is wrong if this is happening? I know that it is sopose to go to a catch can but I have seen others run the filter on top of the valve cover or does it really have that much oil go through that line when you get on it really hard? I have checked the compression and it's like 150,150,150,150 so either I'm getting blow by that is bad enough and equal across all 4 (weird) or my compression is fine. Anyone have any insite let me know, I am about to just pull the engine and put new rings in it to make sure that's not it but if it really does move that much oil through there that's cool I'll just put a catch can on. BTW this is an S13 Redtop Sr20det I am having problems with.

i think you should put a catch can on regardless because they look nice.

if you're talking about what i think you're talking about, the catch can won't stop it from leaking.

mayday, whats the T that comes off the valve cover?? am i missing something or what?? if anything it sounds like you need a new seal around your valve cover.. i don't really know what a T is on a valve cover..

its probably your valve cover gasket....

yeah thats what i meant

um... not the valve cover gasket. ON SR20DET motors (all of them that have stock valve cover and valvecover attachments) there is a T pipe that comes off the valve cover on the Right hand side if you are looking from the front. This is where the oil is coming from not from the valve cover gasket. It also only happens when I get on it REALLY hard. The rear part of the T goes to the crank case from what I understand and the front went to a factory oil catch can also from what I understand, I have a breather connected where the oil catch can should go and I have known alot of other people to do the same but never heard of anyone blowing oil out the breather and I'm doing it to the point that it must be pouring out. I can rev the car all the way up to 7500 RPM out of gear and no oil, but I get out on the road stop and take off really hard and smoke starts coming from under the hood, pop the hood and right below the breather there is a puttle of oil on the exhaust manifold. I still think I"m getting blow by, but how many people are getting 150 all the way across on sr's?

oh ok i see what you mean about the t pipe now. if the pipe that goes towards the front of the engine bay is a breather, try to angle it up. what is probably happening is gravity is pushing it out the breather instead of to the crank case. also i'd check that the hose going to the crank case isn't clogged. that should slow the oil flow from the breather.. if it doesn't then you probably have some kind of internal problem.
for everybody else, the t-pipe is attached to the valve cover in this pic.

http://homepage3.nifty.com/t-craft/katouennzinn105.gif

Best Case:
if you came around the corner pretty hard some oil could have made its way up the hose and pooled in that filter.

Worst Case:
You've got skyline amounts of blow by and your rings and or Valve Seals are toast (leakdown time)


either way put a Catch can on it and loop it into your intake. that way you'll be able to keep track of your blow-by and pick up some block vacuum. I used clear hose... after three weeks of runtime the hose is still clear after the tee.

Why mess with a perfectly good PCV sytem?