The Stovebolt Site Forums The Shop Area Engine Shop How would a oil filler tube work in place of the road baffle

I am dressing up my 235 and have a old chrome 327 oil filler tube that use to go in the top of the intakes. I hate the way the rd baffle looks and thought this looked kind of cool and fits decent. Have any of you ran these with a oil breather on top also and did you have and leaking issues?

It won't work without the road draft tube unless you install a PCV valve instead of the road tube. If you plan to use the V8 oil filler, you'll need to install a fitting to draw air from the tube to a PCV valve, and install a series of angled baffles below the PCV to keep it from sucking liquid oil into the vent valve. You'll need to install a sealed fill cap, not a vented one, and run a hose from the air cleaner to the valve cover to let vent air into the engine.

Older 216's did incorporate the oil filler into the road draft tube with a twist-on cap at the top of the standpipe.
Jerry

Okay thanks, another question if I put a freeze plug to block off where the road baffle tube was and drill a hole in top of my valve cover and use a rubber grommet and pcv valve would this work as well? I have a friend with a older 225 and did the freeze plug with a hole frilled in it and put a pcv valve in it with grommet and it has oil always seeping from it. This will be a show truck and don't want to always be cleaning oil leaks.

That will work as long as you never start the engine. It sounds like you're building a trailer queen, so just push it on and off the trailer, or use a winch.

PCV= POSITIVE CRANKCASE VENTILATION

This means you need a source of air INTO the engine- - -the hose from the air cleaner to the valve cover, and an outlet- - -from the road draft tube/oil filler pipe to the PCV valve. Blocking off the airflow will result in crankcase pressure pushing oil past gaskets and seals everywhere. To really avoid leaks, just don't put any oil in the engine and make the truck a static display piece.
Jerry

Not going to be a trailer queen. Plan on driving it 30-170 miles one way to shows. Just don't want tons of oil leaking everywhere, guess I'll try the PVC in place of the rd baffle

Some people place a disposable diaper under the road draft tube.

I'd bet if you run your truck at moderate and higher speeds (40+ mph) for 30 minutes, the drips would be minimal (but not eliminated).

Yepper. Like that right there.

The oil filler combined with ventilator was also on the early 235s up to 1948, when the 6000 235s had the oil filler on top of the valve cover (even without the PCV).

Looking for clarification...so the road draft tube on the passenger will leak oil regardless of how well the engine is rebuilt? I'm beginning my 235 and was just curious.

A little oil vapor might condense and drip, but it's not really a big deal. The draft tube doesn't start functioning as a flow-through vent until about 30 MPH road speed is reached to get enough air speed past the end of the tube to create a vacuum. Before that, most of the vapors and blowby gases escape out the top through the vented oil fill cap or the slots in the valve cover on some models.
Jerry