8th Generation Honda Civic Forum - View Single Post - Creative Minds Needed: Let's Design an Effective Oil Catch Can Setup

blueroadster · 12-21-2007, 07:54 PM

I have played around with different oil catch can setups and have concluded for several reasons that the catch can itself should be placed inline on the hose running from the PCV to the intake manifold. Rather than running hose all over the place, I wanted to keep the implementation simple. It would also be effective and inexpensive. Below are the core components:

Core Component: Husky Mini General Purpose Filter Model HDA704 (available at Home Depot...The part is also sold under the Coleman Powermate brand name). This will function as the oil catch can and it is important since it is sealed and functions as an air filter to catch oil vapor, etc.
Core Component: One Way Check Valve (core specifically if your car is boosted to prevent the positive intake manifold pressure from hitting the PCV where boost could bleed into the crankcase or blow right into the crankcase if the PCV has failed). I have used a PCV based one way check valve with a viton diaphram in the past, but this new configuration will more than likely require the use of a one way brass check valve (likely with a viton diaphram as well).
Other Components: This is where the suggestions are specifically needed.

With the above items in mind, I came up with a rough configuration that would allow for the mini-filter to be installed in the same location as the stock hose running from the PCV to the intake manifold. Here is a PIC:

The stock hose is on the top. The mini-filter is also there with some temporary brass fittings (minus the check valve) to get an idea of the space. The reason for the vertical pipe pieces is to raise the mini-filter up some so that it will fit in the limited space available. The issue with the above PIC however is that the part is now too long. What I was thinking about doing was removing the temporary brass fittings, screwing pipe into the female threads on the mini-filter, bending the pipe to conform and then having male threads on the other end of the pipes. On the PCV side, the pipe would need to have an adapter to screw into the threads so that it could have an adapter attached to connect to the threads where the PCV was connected (granted the PCV itself would need to be removed, but this would be okay if there is a one-way check valve installed inline...It would also give a little more clearance for the part and a secure attachment point...The PCV connection is an M14x1.5mm). On the intake manifold side, the male ends of the pipe coming from the mini-filter would have a one way check valve going to a barb fitting installed so that a hose could run from that barb fitting to the fitting on the intake manifold itself.

Those are my thoughts at this point and I would like to solicit help and feedback to finalize.

12-21-2007, 07:54 PM	#1 (permalink)
blueroadster Senior Member Member Join Date: Aug 2006 Location: Maryland Posts: 3,573 iTrader: 7 / 100%	Creative Minds Needed: Let's Design an Effective Oil Catch Can Setup I have played around with different oil catch can setups and have concluded for several reasons that the catch can itself should be placed inline on the hose running from the PCV to the intake manifold. Rather than running hose all over the place, I wanted to keep the implementation simple. It would also be effective and inexpensive. Below are the core components: Core Component: Husky Mini General Purpose Filter Model HDA704 (available at Home Depot...The part is also sold under the Coleman Powermate brand name). This will function as the oil catch can and it is important since it is sealed and functions as an air filter to catch oil vapor, etc. Core Component: One Way Check Valve (core specifically if your car is boosted to prevent the positive intake manifold pressure from hitting the PCV where boost could bleed into the crankcase or blow right into the crankcase if the PCV has failed). I have used a PCV based one way check valve with a viton diaphram in the past, but this new configuration will more than likely require the use of a one way brass check valve (likely with a viton diaphram as well). Other Components: This is where the suggestions are specifically needed. With the above items in mind, I came up with a rough configuration that would allow for the mini-filter to be installed in the same location as the stock hose running from the PCV to the intake manifold. Here is a PIC: The stock hose is on the top. The mini-filter is also there with some temporary brass fittings (minus the check valve) to get an idea of the space. The reason for the vertical pipe pieces is to raise the mini-filter up some so that it will fit in the limited space available. The issue with the above PIC however is that the part is now too long. What I was thinking about doing was removing the temporary brass fittings, screwing pipe into the female threads on the mini-filter, bending the pipe to conform and then having male threads on the other end of the pipes. On the PCV side, the pipe would need to have an adapter to screw into the threads so that it could have an adapter attached to connect to the threads where the PCV was connected (granted the PCV itself would need to be removed, but this would be okay if there is a one-way check valve installed inline...It would also give a little more clearance for the part and a secure attachment point...The PCV connection is an M14x1.5mm). On the intake manifold side, the male ends of the pipe coming from the mini-filter would have a one way check valve going to a barb fitting installed so that a hose could run from that barb fitting to the fitting on the intake manifold itself. Those are my thoughts at this point and I would like to solicit help and feedback to finalize. Last edited by blueroadster; 12-21-2007 at 08:15 PM.