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Tonny_Larsen
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Joined: July 02, 2003
Posts: 340
Location: Denmark
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 Posted: Fri Oct 13, 2006 12:54 pm Post subject: |
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I have looked at 3 crankcases I have, a 50, a 53 and a 54. See pictures. Sorry for the picture size.
Does anyone know what the small numbers are for, the numbers in red circle.
-Tonny
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67pickup
Samba Member
Joined: November 26, 2005
Posts: 55
Location: Bergen, Norway
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| Posted: Sat Oct 14, 2006 9:31 am Post subject: |
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| Hei Tonny! Just guessing - could it be some kind of "approved by" a controller at the factory? Didn't VW have quite stringent quality controls? |
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janerick3
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Joined: June 04, 2006
Posts: 974
Location: Colorado
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| Posted: Sat Oct 14, 2006 2:42 pm Post subject: |
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| Tonny_Larsen wrote: |
I have looked at 3 crankcases I have, a 50, a 53 and a 54. See pictures. Sorry for the picture size.
Does anyone know what the small numbers are for, the numbers in red circle.
-Tonny
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Both the '50 and dished-piston '54 cases have an "A" stamped to the right of the number. I understand the "A" was added when the engines were upgraded to 36hp (30hp DIN) with 77mm flat-top pistons. Were both these upgraded with 36hp pistons at some time (the early pistons were date-stamped with month and year).
I believe the small numbers are inspector stamps.
_________________
Thanks,
Jan K. |
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Tonny_Larsen
Samba Member
Joined: July 02, 2003
Posts: 340
Location: Denmark
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| Posted: Sun Oct 15, 2006 7:18 am Post subject: |
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| janerick3 wrote: |
| Tonny_Larsen wrote: |
I have looked at 3 crankcases I have, a 50, a 53 and a 54. See pictures. Sorry for the picture size.
Does anyone know what the small numbers are for, the numbers in red circle.
-Tonny
|
Both the '50 and dished-piston '54 cases have an "A" stamped to the right of the number. I understand the "A" was added when the engines were upgraded to 36hp (30hp DIN) with 77mm flat-top pistons. Were both these upgraded with 36hp pistons at some time (the early pistons were date-stamped with month and year).
I believe the small numbers are inspector stamps. |
I don't know about the 30PS (20-0798277) I only have the crank case.
I can't se any data stamp on the 50 (20-0218942) pistons, but the cylinders is stamped 1953, and the pistons is size 74,95.
-Tonny |
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janerick3
Samba Member
Joined: June 04, 2006
Posts: 974
Location: Colorado
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| Posted: Sun Oct 15, 2006 9:06 am Post subject: |
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| Tonny_Larsen wrote: |
| janerick3 wrote: |
| Tonny_Larsen wrote: |
I have looked at 3 crankcases I have, a 50, a 53 and a 54. See pictures. Sorry for the picture size.
Does anyone know what the small numbers are for, the numbers in red circle.
-Tonny
|
Both the '50 and dished-piston '54 cases have an "A" stamped to the right of the number. I understand the "A" was added when the engines were upgraded to 36hp (30hp DIN) with 77mm flat-top pistons. Were both these upgraded with 36hp pistons at some time (the early pistons were date-stamped with month and year).
I believe the small numbers are inspector stamps. |
I don't know about the 30PS (20-0798277) I only have the crank case.
I can't se any data stamp on the 50 (20-0218942) pistons, but the cylinders is stamped 1953, and the pistons is size 74,95.
-Tonny |
That's good to know. At least we know that the '50 engine was rebuilt at the factory around 1953-54 as an 1131cc and the "A" stamp doesn't automatically assume an engine has a 77mm bore.
_________________
Thanks,
Jan K. |
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Tonny_Larsen
Samba Member
Joined: July 02, 2003
Posts: 340
Location: Denmark
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| Posted: Sun Oct 15, 2006 9:55 am Post subject: |
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| janerick3 wrote: |
| Tonny_Larsen wrote: |
| janerick3 wrote: |
| Tonny_Larsen wrote: |
I have looked at 3 crankcases I have, a 50, a 53 and a 54. See pictures. Sorry for the picture size.
Does anyone know what the small numbers are for, the numbers in red circle.
-Tonny
|
Both the '50 and dished-piston '54 cases have an "A" stamped to the right of the number. I understand the "A" was added when the engines were upgraded to 36hp (30hp DIN) with 77mm flat-top pistons. Were both these upgraded with 36hp pistons at some time (the early pistons were date-stamped with month and year).
I believe the small numbers are inspector stamps. |
I don't know about the 30PS (20-0798277) I only have the crank case.
I can't se any data stamp on the 50 (20-0218942) pistons, but the cylinders is stamped 1953, and the pistons is size 74,95.
-Tonny |
That's good to know. At least we know that the '50 engine was rebuilt at the factory around 1953-54 as an 1131cc and the "A" stamp doesn't automatically assume an engine has a 77mm bore. |
I believe the 50 engine have been rebuild more than once. Se picture.
-Tonny
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tomas persson
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Joined: December 09, 2002
Posts: 183
Location: Sweden
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| Posted: Wed Sep 12, 2007 3:19 pm Post subject: Engine number - date of birth? |
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Hi,
I got two battered cases that appears to be NOS, but they have had a long life outside in nothern Europe. Case numbers are -20-444095- and
-20-0311519- how old are they?
Thanks for any help, Tomas in Sweden |
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RockStock
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Joined: November 26, 2004
Posts: 2612
Location: England
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surfindo
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Location: Haarlem, Netherland
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