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Casting Numbers on a Model J Block?

  • Chris Summers
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20 Jun 2011 17:55 #20337 by Chris Summers
Replied by Chris Summers on topic Casting Numbers on a Model J Block?
A Kissel with a 420-cid engine...that must have been something to behold and try to drive.

Always interesting comparing notes on these old things.

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  • Bob Roller
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20 Jun 2011 17:49 #20336 by Bob Roller
Replied by Bob Roller on topic Castings/motor block
It would make no difference about the head. The term "designator" is the key. The CID was the same but the block wouldn't have to be.
Raydon Thompson once had a Kissel with a 420 CID flathead engine and the entertwined initials IH on the rear over the bell housing.The engine was not original to the Kissel and International trucks had nothing like it so it still remains a mystery. The head gasket blew and that's how the bore and stroke were discovered to be the same as a stock "J".It may have een an industrial engine by an obscure and now long gone/forgotten maker.

Bob Roller

Bob Roller

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20 Jun 2011 17:13 #20334 by Joel
Replied by Joel on topic Re: Block numbers?

Bob Roller wrote: Lycoming did cast other large blocks for trucks that had identical CID of 420 when finished.

Bob Roller


FYI: George Albright investigated the other Lycoming 420 block for the possibility of converting one to a Duesy block. They are completely different. The truck block is a flat head.

Joel Nystrom
1929 Duesenberg Model J Murphy Convertible Coupe
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  • Bob Roller
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17 Jun 2011 19:27 #20316 by Bob Roller
Replied by Bob Roller on topic Block numbers?
I would say it's a mould number if it appears on all the "J"blocks. If it is,it would be an "in house"designator for the "J"blocks only.
Lycoming did cast other large blocks for trucks that had identical CID of 420 when finished.

Bob Roller

Bob Roller

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  • alsancle
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16 Jun 2011 13:26 #20310 by alsancle
Replied by alsancle on topic Casting Numbers on a Model J Block?

alsancle wrote: I was wondering if all blocks had this number cast? Unfortunately the other block I have access to is off at the machine shop so I didn't have another to compare.


Well, I've got a picture of at least one other block with the exact same casting so I'm guessing it present on all the other blocks too.

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  • alsancle
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15 Jun 2011 16:27 #20304 by alsancle
Replied by alsancle on topic Casting Numbers on a Model J Block?
I was wondering if all blocks had this number cast? Unfortunately the other block I have access to is off at the machine shop so I didn't have another to compare.

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  • Chris Summers
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15 Jun 2011 13:04 #20301 by Chris Summers
Replied by Chris Summers on topic Casting Numbers on a Model J Block?
Greg Frownfelter pointed out that the numbers are similar to the casting number on the '35-'36 Auburn head. Maybe an internal number from Lycoming?

I expect that Randy will provide the real answer soon.

Chris Summers
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  • Chris Summers
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15 Jun 2011 12:37 #20300 by Chris Summers
Replied by Chris Summers on topic Casting Numbers on a Model J Block?
From p. 48 of my reprint of the Model J parts list. I don't know if AA signifies anything different but this was the only J100 I could find. Anyone with a solid answer is welcomed to join in and offer a correction or further explanation - remember, I'm not a technical guy in any way, shape or form.

(pardon the size but I wanted to make sure everyone could read it)


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  • alsancle
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15 Jun 2011 00:56 #20297 by alsancle
Casting Numbers on a Model J Block? was created by alsancle
I know the J number is on the bell housing, but what is this number found cast in the right side under the water jacket cover?

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