I have an oil catch can installed on my 92 corolla, but I have a 16v 4AFE.
The purpose is the same, it keeps oil that would normally come out of the PCV valve on the valve cover from going into the intake. On a stock car there is a hose connecting the PCV to the intake. An oil catch can goes in between these and allows the gases and vaccuum to come out of the valve cover, through the PCV valve, then travel through the hoses into the oil catch can where the oil stays, and the clean vaccuum air continues out and into your intake.
I installed one on my car because I had oil filling up my IACV in my throttle body, and generally gunking up the inside of my intake manifold. Ever since installing the catch can my throttle body and intake manifold have been spotless. Its supposed to improve fuel efficiency as well by reducing oil getting on the spark plugs inside the combustion chamber, but thats a long shot.
You can see it a little bit here. Sorry its an old picture when I first got the car. Was one of the first things I did to it. The catch can is to the left back of the intake manifold in the picture. You can see the hoses coming from the PCV and intake manifold going to the catch can.
![]()
The purpose is the same, it keeps oil that would normally come out of the PCV valve on the valve cover from going into the intake. On a stock car there is a hose connecting the PCV to the intake. An oil catch can goes in between these and allows the gases and vaccuum to come out of the valve cover, through the PCV valve, then travel through the hoses into the oil catch can where the oil stays, and the clean vaccuum air continues out and into your intake.
I installed one on my car because I had oil filling up my IACV in my throttle body, and generally gunking up the inside of my intake manifold. Ever since installing the catch can my throttle body and intake manifold have been spotless. Its supposed to improve fuel efficiency as well by reducing oil getting on the spark plugs inside the combustion chamber, but thats a long shot.
You can see it a little bit here. Sorry its an old picture when I first got the car. Was one of the first things I did to it. The catch can is to the left back of the intake manifold in the picture. You can see the hoses coming from the PCV and intake manifold going to the catch can.
