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You can run the engine without the PVC valve. I ran my taxi for several years with a downdraft tube and a pipe plug in the intake manifold without any problems except excess fumes in the car. The fumes inside the car were eliminated after the correct tubing was installed. I can not say if the PVC system was used on taxi cabs only or if it was used on 6 cyl passenger cars as well. I have not incountered the setup piped into the intake on any 48-50 eight cly cars that I have seen. My 49 taxi 6 cyl is equiped with the PVC piped into the intake like your setup. Does anyone know if this was a taxi only setup? Packardtaximan

I have read that the Packard taxi 6 cylinder engine had some feature that the passenger car 6 did not. Per the Packard mechanical specs the passenger car had the standard "crankcase ventilator" and the taxi had the "manifold vacuum type".
The 1947 Packard Clipper 6 4dr sedan I owned had the standard type. It was a low milage original car that I purchased from the original owner back in 1985.

Who's to say that the Packard dealer did not retrofit the engine with the taxi style ventilator. Today its called a positive crankcase ventilator(PVC).

"Ask the man who owned one".

Thanks VERY much for all of the feedback on my parts ID request.

I now know where to install my back-up light switch, and I realize that my '47 Clipper had an early PCV valve.

As I mentioned, the PCV valve on my car has no plunger or ball to close the crankcase gases, so I went searching for a replacement part - somewhere/someplace.

After turning over a lot of rocks, I found two companies that have some NOS vintage PCV valves in-stock. I haven't installed the replacement part yet, but the fittings are the same size, so I believe that it's a "no-brainer".

By the way, both of these companies identify the PCV rig as a Kaiser Willys/Jeep part from the 1940s & 1950s.

Here's the info on the two companies:

#1). Kaiser Willys Auto Supply (in South Caroline) describes their PCV part as "Emission Control PCV Valve<br>Fits 41-71 Jeep & Willys with 4-134 engine. Item #: A6895
New Old Stock Emission Control PCV Valve. Buy them while they last. Limited supply NOS original PCV valves."

Their website is here ->kaiserwillys.com

#2). Peter DeBella Jeep Parts in Riverhead, NY. Peter's website is atdebellajeepparts.com

The website's item description atdebellajeepparts.com/m38premier.htm
says "PCV Valve This valve is always clogged or missing. Fits both M38-M38A1 and MB-GPW. $35.00"

Thanks again for all of the helpful input and assistance.

I will let you know when I have the manifolds back together and on my car, with the new PCV valve hooked-up & functioning.

Best regards,

Dave Blandford
cell 513-205-3188

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