PCV Catch Cans

Zembonez

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I think we do.
 

thunderstruck

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Well honestly, I would be more concerned with the EGR valve causing build-up than the PCV valve.
 

BigBlueLB756

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Luckily, new-model truck owners don't have to worry with EGR, and the PCV valve has been replaced with an orifice (small hole) in the driver's side valve cover.
 

Draenor

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I see how this can help, especially on the 4.3s as I find they gum up the TBs on a more regular basis.


The catch cans are more practical on boosted application such as a turbo. The turbo runs off the engine oil for cooling, so the crankcase tempertures/pressures can be a tad higher than normal.
 

sand man

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they do help cause the vapor reduces timing and reduces HP for example
if u are runnin 93 and there is some vapor the timing will be reduced to function as the gas was 89

thats what i know about these catch cans and ill be getting one soon they are cheap and worth trying
 

99chevy7.4L

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Well BigBLue I went to Lowes the other day and my hideously SMALL Lowes don't carry the air/water seperator it in stock. What a Bummer. Perhaps I can find at Harbor Freight or Home Dump-O.
 

99chevy7.4L

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Thanks Big Blue now I have a model number for the people at the Home Depot to look up. Also you mentioned you replaced the material inside with something else. Wasn't it air conditioner filter material. I remember reading it somewhere once but don't remember where.
 

BigBlueLB756

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And the H/D one matches your truck, so you won't have to paint it.

I made the inner filter out of that blue synthetic air filter material. Just cut it out in circles the size of the original metallic filter that was in the separator. I tested it before I used it to see if it might melt, and it didn't. It's very porous, allowing the oil vapor to condense on the fibers and drop off. It's about 3/8" thick, and I used several layers.

You could use many other materials in place of it; it's what I had on hand. It just looked like the metallic filter might clog up easily.
 

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