1934 eight cylinder head

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Bill Hawley
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Joined: Wed Feb 10, 2021 7:16 pm

1934 eight cylinder head

Post by Bill Hawley » Thu Feb 11, 2021 11:27 am

In short, my car was exhibiting the signs of a blown head gasket. I took the head off and sure enough the gasket was compromised between two of the cylinders. I also noticed a crack in the top of the head. I took the head to a machine shop and had them magnaflux it, which they did and verified the crack. They ground the crack so there is now a small groove where the crack was. It's hard to tell but appears the crack did not go deeper than the small groove but I can't be sure. I also do not know if that crack was in any way related to the blown head gasket so I'm considering just reassembling the engine with a new head gasket. Any thoughts?
Also, do any of you have a recommendation for a supplier for a new head gasket that is reliable?
Also, do any of you have a recommendation for where to look for a replacement cylinder head?
Thank you.

Dave Czirr
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Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: 1934 eight cylinder head

Post by Dave Czirr » Thu Feb 11, 2021 3:04 pm

Hi Bill, and welcome.

You might consider having your current head pressure-tested to confirm there are no concealed cracks.

Proper quality headgaskets are readily available from many sources, among them Kanter Auto Parts who sponsors this forum for the Packard Club, and Max Merritt. Also gasket specialists like Olson's Gaskets no doubt has proper gaskets. For all I know, all of them get their gaskets from the same source, I never had a problem with gaskets from any of these.

Hollander's and the PI interchange manuals indicate that heads from the 320 cubic inch motors of 1934, '35, '36 and '37 will functionally interchange, though the post-1934 cylinder head water outlets will differ and will require some change in how you configure your upper radiator hose. Heads from the Super Eight (320 engine) of 1938 and 1939 will bolt up but if I recall correctly, the cooling water passages were reconfigured. Also, I had thought that the 1933 Eight head (1001-1002) would also interchange but the manuals don't indicate this. Regardless, carefully check any head you obtain not only for the usual considerations but also for a proper alignment of the cooling passages. And remember, just to add a little confusion, heads are numbered by casting numbers, not part numbers as a single casting could be use to produce multiple part numbers, as with the low, std, and high compression variations.

I've have my 1934 Eight sedan (1100) since about 1964 and have put tens of thousands of happy miles on it, it's a great car and I wish you many happy miles with yours. I'd be interesting in knowing more about your 1934 Eight, especially the vehicle number and theft-proof numbers, motor number if original to the car, and a couple of pictures here would be nice. Send the numbers by PM is you wish to keep them confidential.

flackmaster
Posts: 229
Joined: Thu Aug 20, 2009 8:12 am

Re: 1934 eight cylinder head

Post by flackmaster » Thu Feb 11, 2021 7:33 pm

If you want to go down that road, I can provide cleaned, tested, planed, painted head, 3383813, which was Packard's latest and last cast iron replacement head. As DaveCz notes, will necessarily have a later style water outlet on top, which I have as well, along with NOS head gaskets.

Bill Hawley
Posts: 2
Joined: Wed Feb 10, 2021 7:16 pm

Re: 1934 eight cylinder head

Post by Bill Hawley » Sat Feb 13, 2021 11:59 am

David and Flackmaster - thank you for taking the time to write to me. I really appreciate it. Can you give me some idea as to how the head could be pressure tested? Somehow it is not looking obvious to me.
David, my '34 is also an 1100 sedan. I love the car but need to get this head issue worked out. I would be happy to send you some pictures. Do I just attach them in this kind of forum?

Thanks

Bill

Dave Czirr
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Posts: 5375
Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: 1934 eight cylinder head

Post by Dave Czirr » Sat Feb 13, 2021 2:14 pm

Any good automotive machine shop should be able to pressure test the head, mounting the head securely against a waterproof sealing surface such as a rubberized steel plate is one method.

Sure, post a few pictures of your car here or in the discussion group for photographs. You may need an editing program to reduce the file size.

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