Excessive oil in catch can...
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From: McKinney, TX.
Excessive oil in catch can... So I just got and installed my Jamesbiz catch can and got my car back out on the road. His product looks and fits great I'm just worried about the amount of oil I'm catching in the can. This is a ls2 motor from a TBSS and I only have the valve cover to plug into to pull vaccum on the crankcase, not on the valley cover like the LS6/GTO style. I've probably driven the car maybe 5-10 miles and made just a couple of hard runs in 2-3 gears and decided I'd take a look in the catch can. I was suprised that it was almost full of oil already... That dosen't sound right does it? The motor has a FTI cam and is otherwise stock. I did down shift kind of hard and that probably created some serious vaccum, but it shouldn't be pulling out this much oil... Tapping the valley cover with a fitting to pull vaccum from there should help out, right?
Nice looking catch can, do you have any pictures of the inside?
Where do you have the clean air side of the PCV system connected? This is normally connected to the air bridge and connects to the passengers side valve cover. Where is the PCV valve?
Where do you have the clean air side of the PCV system connected? This is normally connected to the air bridge and connects to the passengers side valve cover. Where is the PCV valve?
Thread Starter
TECH Apprentice
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From: McKinney, TX.
http://www.ls1gto.com/forums/showthr...light=Jamesbiz
I just connected one fitting on the can to the vaccum port on the side of the intake just behind the TB and the other hose to the valve cover port. My dumbass didn't put any kind of valve in-line with anything. I also have a vaccum fitting on the drivers side valve cover near the back of the engine that is currently plugged off. I just read that putting some type of small restrictor should help my problem and also run another line to the other valve cover fitting...
The way you have it connected, you will be sucking oil straight out of the valve cover. The port on the valve cover connects to the clean air side of the PCV system. On the LS1/6, a hose connects from this port to the side of the throttle body. On the LS2, a hose connects from this port to a connector in the throttle body-to-air bridge 'accordian' hose. The catch can connects inline on the dirty side of the PCV system.
Here is a basic diagram of a PCV system with a single catch can:
Here is a basic diagram of a PCV system with a single catch can:
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Thread Starter
TECH Apprentice
iTrader: (8)
Joined: Jan 2004
Posts: 313
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From: McKinney, TX.
The way you have it connected, you will be sucking oil straight out of the valve cover. The port on the valve cover connects to the clean air side of the PCV system. On the LS1/6, a hose connects from this port to the side of the throttle body. On the LS2, a hose connects from this port to a connector in the throttle body-to-air bridge 'accordian' hose. The catch can connects inline on the dirty side of the PCV system.
Here is a basic diagram of a PCV system with a single catch can:
Here is a basic diagram of a PCV system with a single catch can:
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Verdad Gallardo Yeah, I'm an idiot... I'm not running any type of PCV valve and I do not have any fresh air source for the crankcase. I will need to have the fresh air source come from after my MAF so that it is metered air since it will be actually going into the intake manifold eventually correct?
The PCV clean air will need to attach after the MAF. All you need is a connection to the valley cover for the PCV dirty side and a connection at the throttle body for the PCV clean air side. 
Here's my catch can configuration:
