pcv catch can?

L

lsone

New member
run both valve covers into a can thats vented to atmosphere. Drain once a month. Keep it simple.
 
proptop

proptop

Donating Member
I run a crankcase evacuation pump on mine but I don't drive it as much as I used to. A simple system like stated above should work I would think. Picture of the setup a few years back.
Bob
 

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proptop

proptop

Donating Member
That would work as a natural vent to relieve some of the crankshaft pressure. Be in mind you might get blasted by a few that say you should have it as part of your pcv system. Bob
 
L

lsone

New member
no you dont.

Ive had boosted LS rides with both valve covers vented to the exact catch can you posted above since 2003(when I could afford cars lol). It will be fine, the only thing I see as maybe an issues is if you have to do emissions.
 
proptop

proptop

Donating Member
No PCV as Isone has stated if you have to get emissions certified she won't work. I also tried a check/crack valve before in the past but it still picked up oil in the intake track. Most engines that are boosted will have some blow by in them because of the ring gap required for your application. The key to it is to help manage the pressure in the motor so it doesn't blow all the seals out.
Bob
 
L

lsone

New member
proptop said:
No PCV as Isone has stated if you have to get emissions certified she won't work. I also tried a check/crack valve before in the past but it still picked up oil in the intake track. Most engines that are boosted will have some blow by in them because of the ring gap required for your application. The key to it is to help manage the pressure in the motor so it doesn't blow all the seals out.
Bob
Click to expand...
correct, you want zero pressure in the engine crank case. Thats why vacuum pumps are handy for leaky engines, it creates a vacuum inside and holes all the leaks in LOL. Vacuum also helps with ring seal but its overkill for what we are talking about. On a 700+ horsepower engine, Id look at it. With that said, my LS chevelle makes a bit over 1000 at the tire and I just vent to atmosphere.
 
Slyclone

Slyclone

Well-known member
I'm on the same page. I have a small breather attached to the driver side. It puffs smoke. It shouldn't, but it does. Has me very worried. I have the back pcv in operation attached throttle body and front one closest to the radiator support is corked. Not sure if it's hindering me getting the truck running correct. Just been another all out battle with it.
 
NM_TY_Guy

NM_TY_Guy

Donating Member
Easiest thing to do with the rpm CAI is to eliminate one of the pcv valves on the pass side use the same grommet as the other side and run one pcv plugging one off doesn’t hurt anything just looks half assed
 
G

gmemony2

Active member
I ended up fitting a bung for the capped PCV into what I believe is an old RPM CAI. The line had been plugged and set aside previously. Ran out from the T at the valve cover to a sealed catch can and then back to the CAI and throttle body. Left the driver side with the breather. Decided to keep the stock setup, but add in a sealed catch-can for now.
 
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