The Stovebolt Site Forums The Shop Area Engine Shop PCV Valve??

I´m looking for a PCV valve for my 261.
Searcht the usual vendors up and down but no luck. :confused:

Any ideas?

Thanks, Frank

Here is the website of a friend of mine that details how to install one, and gives the information on the pcv valve he installed.
http://www.speedprint.com/Deves50/pcvinstall.php

that´s a great site, thanx a bunch.

Are all the valves the same or do they have different specs for different engines and vacuum?

If possible I want a a valve with a metal housing because I don`t want anything modern plastic at my engine. Any vendors?

Frank

Another option is to leave the road draft tube in place thus retaining the correct look. Drill the appropriate sized hole in the middle of the flat spot as the tube leaves the motor. Add valve. Plug up bottom of tube. Run rubber hose to intake.

Yet another option if you wanted to keep the draft tube is to use a short length of neoprene hose ( fuel grade ) which slips over the draft tube. Its held in place with a couple of hose clamps. In the bottom end of the hoze I fitted a brass plug that I had drilled to fit a rubber grommet. The pcv valve fits snugly into the grommet and a hose goes from this to the inlet manifold. The advantage is that it only takes a couple of minutes to take off , if you ever needed to. I'm working on a filter at the moment to reduce the amount of gunk going into the intake.

The idea came from Yachtcare who used to post on the board a while back.

Cheers

Bob

a valve is going to use intake vacum so use a valve from a small engine putting it in the road draft tube is a good idea as if you just stick it in the vc it could suck oil it needs to be removed from the chance of sucking oil also if will have tobe large enough to handle the crankcase preasure...doc

a valve is going to use intake vacum so use a valve from a small engine putting it in the road draft tube is a good idea as if you just stick it in the vc it could suck oil it needs to be removed from the chance of sucking oil also if will have tobe large enough to handle the crankcase preasure...doc

Hey guys educate me a little here what are the advantages of running a PCV on a 235 other than the possible oil drip form the draft tube?

Thanks
George

Doc, almost all factory PCV systems (including the ones used on late 30s-late 50s GMCs) used a valve cover fitting. If you're that worried about it, a small baffle can be welded to the inside of the valve cover under the hole.

that is what I was trying to get at just don,t stick in the vc without some mods to not suck oil..doc

gmcpanel, is it possible that my 53 1/2 ton gmc 228cu is a factory setup as it has an elbow in the VC with a rubber hose to a pcv and then to a connection in the intake manifold? (there's no mod to keep it from sucking oil. it does suck some, using the road draft tube as the inlet for the air flow but it doesn't seem to matter to the engine. i think it like burning a bit of oil.
tony

Old_blue, check out the GMC forums. I think the factory PCV systems eliminated the road draft tube (my dad's '51 350 has the setup), but I'm not 100% sure.

George,

Apart from reducing the oil drip, a PCV is much better for the environment. All those vented gases are being reburnt. Should also help oil leaks from the engine. You may also get slightly better fuel consumption. The engine seems to run a wee bit quieter and smoother idle. Definitely worth doing.

Cheers

Bob

i once used a cap with pvc valve from some old dodge or plymoth. the cap thing fit over the draft tube ( turned up and cut to length ) on 54 pontiac 8. ran better with less oil loss.