Oh, I'm sure Ernie - thanks. However, I'd like to also hear from someone what is the orig & new part No's for the Custom 356 Thermostat & gasket for !946-47, 21st series.

In checking the Parts Cross-Reference for both Thermostat & Gasket I couldn't see direct listing for Packard Custom 356 for 1946-47. 21st Series.

Can anyone help with the both the original Packard Part No & also modern part no for for both thermostat & gasket and also Brand/Vendor(s)?

Big Thank You!

Thank you Dbedsole, su8overdrive, bkazmer, & jimw for your kind reply!

Thanks Tim & Ernie for taking time to respond - I appreciate it!

I'm posting this Q in hopes that someone might share what they have or know: does anyone have or can direct us to the original COLOR MIXING FORMULA for Dupont's GREEN ENGINE paint? Also is the 546A (Bell green) listed the original Dupont number?


[I already know of Hirsch, Kanter & Merritt's paint stock. I also know that the green shade for Packard varied slightly through the years, also depending on available supply. What I'm after is the COLOR MIXING FORMUA.]

A Big THANK YOU to those who can help us!

Oops, I also meant to ask you to comment on what may be causing the seepage from the original post - pasted again, below. Thanks, again!

I have replaced the V-Belt for the 356. I am using NAPA Extended Life Coolant for my 50/50 mixture that I mix myself. Prior & afterward I'm still seeing some coolant seepage from base of the coolant flange/spout and also the base of the hot water feed fitting on cylinder head. The water pump sounds pretty normal otherwise except for a rare chirp. For a few mins until it then disappears after engine warms up there is also some odorless white smoke or vapor leaking from manifold side of engine near the 4th & 5th cylinders & from rear exhaust - again, both disappear upon warm up.

Is there any way to lubricate these water pumps at any spot?

Thank you, Tsherry & David

I have replaced the V-Belt for the 356. I am using NAPA Extended Life Coolant for my 50/50 mixture that I mix myself. Prior & afterward I'm still seeing some coolant seepage from base of the coolant flange/spout and also the base of the hot water feed fitting on cylinder head. The water pump sounds pretty normal otherwise except for a rare chirp. For a few mins until it then disappears after engine warms up there is also some odorless white smoke or vapor leaking from manifold side of engine near the 4th & 5th cylinders & from rear exhaust - again, both disappear upon warm up.

Q: On a side note what is this slot I see in the attached photo of the mounting cone on front of water pump - is that a ventilation slot? is it possible to squirt a little lubrication in there in hopes of doing some good or are the postwar pump bearings sealed?

Q: (See yellow arrow pointer in attached photo) What might that be sticking out of the slot? I thought it might be a cotter pin of sorts but looks more like an allen wrench sticking out. I wanted to pull it out but thought I better ask advice first on it?

Thank you very much for the help!

Attach file:

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  Yellow Arrow.png (891.31 KB)

JWL, Thanks for posting your "shine-tee" engine - handsome!

Thanks everybody! I wanted to post that the V-belt on my car was a Gates Truck & Bus 356T A2 & that part is now cancelled.
So after measuring the belt - it matched Gates TR30537 perfectly. It is 54 1/8" x 7/8" Top Width is .875 & the outside circumference is 54.125 - O'Reilly Auto Parts has in inventory for around $40.88 at the time of this post.