Re: Oiling issues and hole in air filter lid.

Posted by HH56 On 2023/9/21 17:49:44

On the air cleaner hole, if it is half inch or larger possibly someone tried to adapt a valve to form a PCV system. Others have done that by using a valve and length of hose connecting it to the road draft tube port on the valve cover. If smaller than a valve then no idea. Maybe a photo would let someone give a better answer.

On the original prewar type filters there should be a restriction in one of the fittings. Packard specified filling a fitting passage with solder then drilling a hole using a 5/64 drill bit thru the solder. On the prewar filters Packard placed the restricted fitting in the bottom inlet port elbow. You can go thru several of the prewar service letter articles having to do with noisy tappets and revised connections to get details although those were mostly pertaining to 356 engines. Excess flow thru filter would still be applicable to yours though. As I recall the one mentioning the specifics on the orifice was published in 43 and may be linked in an earlier reply.