Packard Forum Index » Modification Discussion

Deleted

deleted

I don't think you need the fan, since the crankshaft functioned as an effective blower/fan in the original design, augmented by road draft when underway. I do suggest that you use a much larger hose or tube to connect the outlet point on the valve cover to the air filter unit. I'd want at least 1" ID there, or better yet, the same size as the opening in the valve cover. The combination of pressure drop across the air filter element and the impetus given to the air movement through the crankcase by the rotating crankshaft should provide good crankcase ventilation with very little chance of developing over-pressure in the crankcase, which you do NOT want. A dip (like a sink drain trap) in the 1" or larger tube near the engine connection could serve as an oil and moisture trap, with a small tube leading from the bottom of the dip to your oil catch reservoir to catch any liquids. With the engine stopped, very little or no fumes would escape the oil filler/breather. The oil mist that would enter the carburetor will do no harm, and might actually improve upper cylinder and intake valve stem lubrication. I suggest checking a hardware store for sink/lavatory drain fittings. I think there are traps and lightweight metal or plastic pipe sized very close to the vent outlet in the valve cover available at low cost.

A simpler solution that I have used on cars with badly worn out engines is to connect a length of 3/4 heater hose to the oil filler cap and place the end of it somewhere away from the engine.
My '37 120 convertible has never had a problem with engine fumes getting into the cabin.

Useless idea. Sorry
I have deleted it.
Bob J