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  #1  
Old 13-03-20, 20:31
Richard Nixon Richard Nixon is offline
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Default Help to identify my engine!

I'm confused! My C8 is registered as a 1941 Chevrolet

The engine number thats stamped on the side of the engine is PR3870771
The engine casting number is GM 839253
The head casting number is 838773

From what I have researched in this forum, David Hayward (RIP) and Cletrac (RIP) identified this as a 1940 216 engine fom the head casting.

http://1954advance-design.com/Stoveb...g-numbers.html

This website shows it as a 1940 head but the block casing doesnt quite match.

Chevs of the 40s, who I was conversing with about buying the engine parts I need, have said it is a canadian 230 engine!

Can anyone identify my engine from the numbers and give me a definitive ID on it?

Many thanks
A very confused Richard!!
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  #2  
Old 13-03-20, 21:10
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chris vickery chris vickery is offline
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From my sources the head comes back as a GM 216cid. Was not able to find any references to the block 839253.
Chris
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  #3  
Old 13-03-20, 21:28
Richard Nixon Richard Nixon is offline
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Thanks Chris,

For reference the bore is 3 1/2" and the stroke is 3 3/4"

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  #4  
Old 13-03-20, 21:46
Grant Bowker Grant Bowker is offline
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In an effort to help, I went looking for David Hayward's large list of #s. The one I'm thinking of has a red/pink background and has been republished several times in deifferent places (many of them crediting David)... and right now I can't find any of them. Can anyone help me find a link to it?
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  #5  
Old 14-03-20, 00:23
david moore david moore is offline
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Default Ford CMP -InfoEx List of CMP engine numbers

For what it is worth, I've looked at my copy of the Ford CMP list. Your engine number is not included but the nearest ones that bracket it are dated ;
PR 3868623 - C60L 12 Dec 1942
PR 3881308 - C60L 22 Jan 1943

The C8's listed are all in the range (ZR) 2802530 to 3766043
Are you sure that your engine isn't ZR as opposed to PR?
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  #6  
Old 14-03-20, 02:25
Richard Nixon Richard Nixon is offline
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Hi David,

Yes its definitely PR.

A friend of mine thats an ex REME chap, said that if they put rebuilt landrover engines back in a landy they prefixed it PR. Would that practice have been in use in the 40s?

The engine overhaul plate shows it had std bores, bearings and big end bearings in October 1945.

Last edited by Richard Nixon; 14-03-20 at 02:44. Reason: spelling correction
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  #7  
Old 14-03-20, 02:30
Paul Singleton Paul Singleton is offline
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Default Mystery engine

Are you sure that the bore is 3 1/2? If itís 3 9/16 you could have a 224 engine from a Canadian GMC truck. I havenít seen one but it is listed in my 1939/40 Canadian shop manual. It was a Canadian manufactured engine for the GMC and basically seems to be similar to the 216 but with a larger bore and aluminum pistons. It was probably made obsolete by the 235 engine introduced in 1941. If it is a Canadian built engine that may be reason for the odd casting numbers.

Paul
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  #8  
Old 14-03-20, 02:36
Richard Nixon Richard Nixon is offline
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overhaul plate and engine number.....
Attached Thumbnails
engine number.jpg   overhaul plate.jpg  
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  #9  
Old 14-03-20, 02:39
Richard Nixon Richard Nixon is offline
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Quote:
Originally Posted by Paul Singleton View Post
Are you sure that the bore is 3 1/2? If it’s 3 9/16 you could have a 224 engine from a Canadian GMC truck. I haven’t seen one but it is listed in my 1939/40 Canadian shop manual. It was a Canadian manufactured engine for the GMC and basically seems to be similar to the 216 but with a larger bore and aluminum pistons. It was probably made obsolete by the 235 engine introduced in 1941. If it is a Canadian built engine that may be reason for the odd casting numbers.

Paul
Hi Paul,
Yes its definitely 3 1/2 bore.
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  #10  
Old 14-03-20, 02:41
Richard Nixon Richard Nixon is offline
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casting number
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casting number.jpg  
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  #11  
Old 14-03-20, 10:13
Richard Nixon Richard Nixon is offline
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I think I might be getting somewhere! I have found PR engine numbers in this list:

https://hotrod.gregwapling.com/chev-...dian-chev.html

It shows the PR series as being assembled in Australia. If I understand it correctly my number is in a series of engines assembled in Melbourne (starting from PR3849349) This shows the engine was in a C60S (Model 2844200538M)

Grateful if someone can confirm my theory!! If right at least I know its a 216 engine block!!
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  #12  
Old 14-03-20, 11:16
Grant Bowker Grant Bowker is offline
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Thank you Richard, that's the listing I was looking for.
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  #13  
Old 14-03-20, 13:12
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Just for your info, the 235 has a 3 15/16" stroke with the 3.5" (same) bore size as the 216 cu. in.
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  #14  
Old 14-03-20, 16:26
Paul Singleton Paul Singleton is offline
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Default Casting number

I found this reference this morning, unfortunately the link is dead to the source. The post was from 2007.

The casting number 839253 appears to be a Canadian 1940-1945 Block (info I have from David Hayward). I have a unique Canadian only casting # on my 1938 216. Apparently GM Canada had 2 engine plants. The one in Oshawa produced casting numbers the same as the US. The one in the Windsor area (Walkerton maybe?) used a different casting number.
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  #15  
Old 18-03-20, 22:57
Richard Nixon Richard Nixon is offline
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I finally got to the workshop to take photos of the casting numbers on the head and the date code on the block.....
Attached Thumbnails
head casting number.jpg   block date casting numbers.jpg   Block casting number.jpg  
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  #16  
Old 19-03-20, 00:16
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Default My guess is 216

Refer to this discussion.
https://www.tm9-801.com/forums/viewtopic.php?t=1778
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  #17  
Old 19-03-20, 03:11
motto motto is offline
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Quote:
Originally Posted by Lynn Eades View Post
Just for your info, the 235 has a 3 15/16" stroke with the 3.5" (same) bore size as the 216 cu. in.
Hi Lynn
According to my data the Chev 235 unpressurised (WW2) engines had a 3-9/16" bore. 3-15/16" stroke is correct. These figures came from TM 10-1557 for 1-1/2 ton 4x4 truck (Known as the Yankee Joe in this country)
216 engine was 3-1/2" bore and 3-3/4" stroke.

David
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Last edited by motto; 19-03-20 at 03:21.
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  #18  
Old 19-03-20, 21:02
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David, you of course are correct. I should not make statements based on memory. Back to the book, I see the 216 is described as "standard engine" and the 235 as"Heavy duty engine".
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