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Old 06-22-2008, 11:05 PM   #1 (permalink)
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PCV catch can install.

I put a catch can in my 93 Voyager today. I figured why not. I went with a cheap eBay model. While installing it I noticed how poorly my PCV system was setup. It amounted to a PCV valve on a 5-6 inch hose running strait down into the intake.

I replaced the valve, a bunch of hose and changed how the valve was mounted (instead of laying on it's side pointing down it now stands straight up)

I then added the catch can and a clear fuel filter after the can so I can see if it's working.

I must have fixed a vacuum leak in the process because my idle smoothed out. Either that or I was sucking a ton of junk into the intake.

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Old 06-22-2008, 11:08 PM   #2 (permalink)
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Cool, Id like to know how it ends up working out. Ive thought about making one of those.
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Old 06-23-2008, 06:36 PM   #3 (permalink)
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I have a catch can on my Firebird. It has a strong tendency to suck oil out the PCV valve which runs straight into the intake manifold. This is especially important on that car since the engine has a CR of 10.4/1, and oil mixing in with the air fuel mixture will lower the octane level. I made mine out of an inline air compressor filter, some fuel line hose and some plumbing fittings.
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Old 06-24-2008, 04:12 PM   #4 (permalink)
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Have you thought about putting some distilled water in it to see if you pick up some mpgs? If it vaporizes some water, it may help. Just don't add too much.
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Old 06-24-2008, 05:42 PM   #5 (permalink)
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I'm not sure why I would want to draw water into my intake.
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Old 01-05-2012, 10:36 PM   #6 (permalink)
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A Better Oil Trap?

I have using a PCV catch device for about 3 years or more and collect quite a bit of blowby gunk that hopefully keeps the system cleaner downstream, and can be recycled instead of burned into the atmosphere (every little bit helps).



The PCV Catch Device when new: adapted from an air-compressor moisture filter

Recently, I emptied the container and clumsily broke-off the PCV Valve connection. So, I realized that I need a bigger container, with a more stable seal (heat destroyed the rubber seal pretty quickly after installation, so tightening the plastic to the metal made for a difficult change-out). The valve at the bottom was originally intended to allow the container to drain, but clogged over time.

There are a couple of other DIY builds here that are excellent, but not transparent to quickly check the level. When I pop the hood, it's likely the first thing that catches my eye, but it needs an improvement (I plan to implement the device on our 3 cars since it seems to work quite well).

Any ideas for a larger version of the pictured item?

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Old 01-05-2012, 11:40 PM   #7 (permalink)
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You can purchase larger catch cans, and mounting brackets and such to go with them, they are sold for performance applications. Here's some examples on Summit and Jegs:

Search Results for catch can - SummitRacing.com

catch+can - JEGS High Performance

I've been running the exact same filter you have on my Firebird for a few years now. I can't tell from your pic if you removed the white filter element inside the cylinder or not. Mine is still in but I have heard that it should be removed, I may do this at some point. I empty mine when it gets filled to the bottom of that filter element, which is about half full, and that happens in about 400 miles. Here's a pic of mine, I mounted it to the cowl in front of the brake booster:

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Old 01-06-2012, 02:48 AM   #8 (permalink)
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Man, I really need to get two of these for my car... The motor has a tendency to throw oil out of both sides... and one of them blows into the intake pre-MAF.
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Old 01-06-2012, 01:35 PM   #9 (permalink)
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If you're getting oil out the PCV inlet hose you can fix it with a breather filter, I also added that to my Firebird. On that car the inlet runs from the throttle body to the passenger side valve cover, and I added the breather filter right at the valve cover. The throttle body where that line connects used to get very oily, now it's nice and clean.

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Old 01-06-2012, 02:39 PM   #10 (permalink)
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RH77 -

I have a glass jar version that is TBInstalled for my car. It's on the infinite TODO list.

CarloSW2

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