Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 01-02-2018, 02:51 PM   #1
Model A Fan
Senior Member
 
Model A Fan's Avatar
 
Join Date: May 2010
Location: Bellingham, Washington
Posts: 351
Default Diamond Block Questions

I have decided to exit the Model A hobby for the foreseeable future and will be parting with many of my extra pieces and whatnot. I have a diamond block engine that is numbered *A4870927* which brings the year of manufacture in right between 1938 and 1939.

What I'm hoping to find is more information about what their "deal" is. Given Model As were produced up until 1931, it is unusual for an engine to be produced so late. I understand that they may have been extra engines or that they were produced for non-auto uses. Does anyone have more information?

Also, what would be the value on one in good shape and in running condition? Mine has been painted a metallic blue, but is still operational. I don't think it would need a rebuild, but maybe just new gaskets. Thanks for the help.

I have included a link to the pics, they are the very last two photos on the album here:

https://www.jalopyjournal.com/forum/...or-sale.27941/
Model A Fan is offline   Reply With Quote
Old 01-02-2018, 06:22 PM   #2
TK in LA
Senior Member
 
TK in LA's Avatar
 
Join Date: May 2010
Location: La Verne, Ca.
Posts: 792
Default Re: Diamond Block Questions

A Fan, Here is a link that should help.
http://www.fordgarage.com/pages/diamondblock.htm
The later castings are desirable for the guys wanting to hop up a banger as the castings had better material and structure. The number on the block is probably not the number for the block itself but was transferred from the previous motor that was removed?
Hope this helps. I know others will chime in.
Good Luck
TK in LA is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 01-02-2018, 06:38 PM   #3
springerpete
Senior Member
 
springerpete's Avatar
 
Join Date: Jul 2012
Location: Central Maine
Posts: 433
Default Re: Diamond Block Questions

If you look on the lower block, carb side just behind the timing gear case you should see a raised letter and two numbers. My diamond block reads C 5 7 which means March 5th, 1937. These blocks had some modern improvements in them. I am sure others will be able to tell you more
springerpete is offline   Reply With Quote
Old 01-02-2018, 08:56 PM   #4
Chris Haynes
Senior Member
 
Chris Haynes's Avatar
 
Join Date: May 2010
Location: North Hills, CA and Pine Grove, CA
Posts: 1,952
Default Re: Diamond Block Questions

My Diamond block has X240.
__________________
1930 Tudor
Early 1930 AA
Speed costs money. How fast do you want to go?

Last edited by Chris Haynes; 01-03-2018 at 06:32 PM.
Chris Haynes is offline   Reply With Quote
Old 01-02-2018, 10:02 PM   #5
Synchro909
Senior Member
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 3,242
Default Re: Diamond Block Questions

Quote:
Originally Posted by springerpete View Post
If you look on the lower block, carb side just behind the timing gear case you should see a raised letter and two numbers. My diamond block reads C 5 7 which means March 5th, 1937. These blocks had some modern improvements in them. I am sure others will be able to tell you more
My diamond A block has 1296 there. Anybody know what that means? I can't read the engine number on it but most likely it is of Canadian origin.
__________________
Be the person your dog thinks you are.
Synchro909 is offline   Reply With Quote
Old 01-03-2018, 12:41 AM   #6
Chris Haynes
Senior Member
 
Chris Haynes's Avatar
 
Join Date: May 2010
Location: North Hills, CA and Pine Grove, CA
Posts: 1,952
Default Re: Diamond Block Questions

It is my understanding that diamond block had no stamped number on the number boss.
__________________
1930 Tudor
Early 1930 AA
Speed costs money. How fast do you want to go?
Chris Haynes is offline   Reply With Quote
Old 01-03-2018, 02:44 AM   #7
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 1,523
Default Re: Diamond Block Questions

That number is not a diamond number.
Chuck Sea/Tac is online now   Reply With Quote
Old 01-03-2018, 02:48 AM   #8
Chippy Minton
Senior Member
 
Join Date: Dec 2016
Location: Seattle
Posts: 129
Default Re: Diamond Block Questions

Aren’t you talking about a Model B block anyway? They would all have been produced after 1931. I would guess that many B blocks have had engine numbers stamped on them as required as, as stated, they did not come stamped.
Chippy Minton is offline   Reply With Quote
Old 01-03-2018, 05:18 AM   #9
juke joint johnny
Senior Member
 
juke joint johnny's Avatar
 
Join Date: Feb 2012
Location: London England
Posts: 851
Default Re: Diamond Block Questions

On Vince's site that would equate to December 9 1936 1296
juke joint johnny is offline   Reply With Quote
Old 01-03-2018, 05:52 AM   #10
jim1932
Senior Member
 
jim1932's Avatar
 
Join Date: Oct 2010
Location: Bethesda, MD
Posts: 2,515
Default Re: Diamond Block Questions

Quote:
Originally Posted by Synchro909 View Post
My diamond A block has 1296 there. Anybody know what that means? I can't read the engine number on it but most likely it is of Canadian origin.
That is probably I296. Or September 29 1936
__________________
Short URL: http://smu.gs/14g7eDW
jim1932 is offline   Reply With Quote
Old 01-03-2018, 04:16 PM   #11
Synchro909
Senior Member
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 3,242
Default Re: Diamond Block Questions

Quote:
Originally Posted by jim1932 View Post
That is probably I296. Or September 29 1936
Thanks, Jim and JJJ.
Consistent with comment above about these blocks not having numbers stamped on them, I can see that there is no star at either end of the number that is or rather, was there. I think it is probably a number put there some time since 1936 by who knows who and who knows why.
__________________
Be the person your dog thinks you are.
Synchro909 is offline   Reply With Quote
Old 01-03-2018, 05:13 PM   #12
TinCup
Senior Member
 
TinCup's Avatar
 
Join Date: May 2010
Location: OKC / Tonkawa, Ok.
Posts: 1,945
Default Re: Diamond Block Questions

A "B" cam is one of the best parts of the these blocks but mostly that they were run in industrial motors such as combines and irrigation pumps which mean they ran at low rpm's and no lateral crank movement due to no clutch action most of the time. That way the original crank journals are usually in good shape. If the flywheel housing is still attached you will find another date stamp there.
__________________
Sooner Model A Club of Oklahoma
TinCup is online now   Reply With Quote
Old 01-03-2018, 05:59 PM   #13
Chris Haynes
Senior Member
 
Chris Haynes's Avatar
 
Join Date: May 2010
Location: North Hills, CA and Pine Grove, CA
Posts: 1,952
Default Re: Diamond Block Questions

Quote:
Originally Posted by Chippy Minton View Post
Arenít you talking about a Model B block anyway? They would all have been produced after 1931. I would guess that many B blocks have had engine numbers stamped on them as required as, as stated, they did not come stamped.
Model B had numbers on the bell housing, not the block. Model A Diamond blocks were available through the late '30's. Diamond blocks were not numbered.
__________________
1930 Tudor
Early 1930 AA
Speed costs money. How fast do you want to go?
Chris Haynes is offline   Reply With Quote
Old 01-03-2018, 06:31 PM   #14
Chris Haynes
Senior Member
 
Chris Haynes's Avatar
 
Join Date: May 2010
Location: North Hills, CA and Pine Grove, CA
Posts: 1,952
Default

...
__________________
1930 Tudor
Early 1930 AA
Speed costs money. How fast do you want to go?
Chris Haynes is offline   Reply With Quote
Old 01-03-2018, 08:39 PM   #15
Model A Fan
Senior Member
 
Model A Fan's Avatar
 
Join Date: May 2010
Location: Bellingham, Washington
Posts: 351
Default Re: Diamond Block Questions

I am just as baffled by it as well, but I don't have a good photo currently. I will try to get a photo of the serial number before the new owner takes it away. It has stars on both ends of the number and based on one of the websites with the info, it is from between 1938 and 1939. I don't understand why someone would mark it with that number (coinciding to that time period) if it wasn't in fact made during between those years.

Hopefully a picture will provide some clues. I'll check on the block for a date code as well.

Thanks for the interesting discussion. I like that sort of thing.
Model A Fan is offline   Reply With Quote
Old 01-04-2018, 02:27 PM   #16
JRShaw
Member
 
JRShaw's Avatar
 
Join Date: Apr 2013
Location: Fairport, NY
Posts: 98
Default Re: Diamond Block Questions

Gentlemen - These discussions have peaked my curiosity about my own (rebuilt) diamond block engine earmarked for my roadster project. The letters are L226 preceded and followed by a slotted round head screw. Am I correct in assuming this lettering would indicate October 22nd of 1936?? Is it known that these diamond blocks came with a "B" cam?? Thank You in Advance.
JRShaw is offline   Reply With Quote
Old 01-05-2018, 03:23 AM   #17
Dollar Bill
Senior Member
 
Dollar Bill's Avatar
 
Join Date: Oct 2014
Location: Keystone Heights, FL
Posts: 646
Default Re: Diamond Block Questions

Quote:
Originally Posted by JRShaw View Post
The letters are L226 preceded and followed by a slotted round head screw. Am I correct in assuming this lettering would indicate October 22nd of 1936?? Is it known that these diamond blocks came with a "B" cam?? Thank You in Advance.
Isn't "L" the 12th letter meaning it would have been cast in December?

From my notes: Beginning in August 1932, complete Model A service block engines were all fitted at the Rouge with Model B camshafts and push rods (tappets), according to the Engine Production Foreman's records. This feature carried forward into diamond block production.
__________________
I Love Anything That Turns Money Into Noise
Dollar Bill is offline   Reply With Quote
Old 01-05-2018, 04:16 AM   #18
Mike V. Florida
Senior Member
 
Mike V. Florida's Avatar
 
Join Date: May 2010
Location: South Florida
Posts: 13,583
Send a message via AIM to Mike V. Florida
Default Re: Diamond Block Questions

Quote:
Originally Posted by JRShaw View Post
Gentlemen - These discussions have peaked my curiosity about my own (rebuilt) diamond block engine earmarked for my roadster project. The letters are L226 preceded and followed by a slotted round head screw. Am I correct in assuming this lettering would indicate October 22nd of 1936?? Is it known that these diamond blocks came with a "B" cam?? Thank You in Advance.
Here is some great information;

http://www.fordgarage.com/pages/diamondblock.htm
__________________
What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II
Mike V. Florida is offline   Reply With Quote
Old 01-05-2018, 03:12 PM   #19
Chris Haynes
Senior Member
 
Chris Haynes's Avatar
 
Join Date: May 2010
Location: North Hills, CA and Pine Grove, CA
Posts: 1,952
Default Re: Diamond Block Questions

Vince told me he has never seen a number like the X240 without the screw that is on my block.
__________________
1930 Tudor
Early 1930 AA
Speed costs money. How fast do you want to go?
Chris Haynes is offline   Reply With Quote
Old 01-05-2018, 04:40 PM   #20
Synchro909
Senior Member
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 3,242
Default Re: Diamond Block Questions

After reading JRShaw's post (#16), I went back to my diamond A block and had a closer look. The number I gave in post #5 was incorrect. In better light, I can see it is J296 (not 1296) and just like JR's, it is preceded and followed by the shape of a screw head.
Following the reasoning expressed here, I figure that motor would have been cast on October 29th, 1936. Is that correct?
The block came to me as part of a deceased estate along with a couple of other disassembled motors, one being a B. The camshaft from the B block is easy to identify by the fuel pump lobe but how do I tell the B cam that was in the diamond A block from the ordinary A cams I also got?
__________________
Be the person your dog thinks you are.
Synchro909 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 11:19 AM.