Hi gearheads, I want to get rid of the road draft tube located at the bottom of the 235 engine. I read an article of someone who installed a modern pcv valve and hooked it up with some tubing to the vacuum connection located at the intake manifold . Can anyone tell me if this is a good system to ventilate the crank area ? You have to use a closed valve cover (no slits) and install a breather on it .
What I did on my 235 was replace the vent tube with a breather ***embly/oil fill from a GMC 270-302. And than closed the valve cover vent and pull from the top of the valve cover into the intake where I put a PCV. It works and vents the engine as GMC designed. I got pictures on my phone but don't know how to get them to here.
I left the draft tube but welded a plug into it and a bung (in the draft tube) where it wasn't obvious, a hose ran from the bung to the intake manifold with PCV valve inline. Works really good.
Not a six popper but on my flathead I left the draft tube and installed a k /n style filter clamped on the end. Ive never had a problem with condensation or oil ****z coming out of the tube. Way easier then the pcv.
see flux's pic above. its what ive been running this last summer. i used a dorman freeze plug number 555-024 drilled a 3/4 hole in it and used black rtv to glue a mr.gasket pcv grommet # 6379 into it, used a standard ignition v237 pcv valve. i bent up 3/8 steel line but you could use hose just as well. i drilled my carb spacer and used some jb weld to seal a 2 in piece of 5/16 tubing for a ****** to hook the pcv line up to. my car is a 57 chevy and it uses a vented oil cap. hope the info helps you
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