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Old 02-19-2015, 08:40 PM
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Cajun_LS3
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Default Help me decode this engine stamp

1969 coupe with an L46. VIN matches, but the engine ID code confuses me.
V 1 I 2 5 H W. (To be clear, that is the letter "I" following the number "1")

V=Flint, MI
1 I = ??
2 5 = 25th day
H W = 350ci/350hp, no A/C
Old 02-19-2015, 08:44 PM
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emccomas
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Originally Posted by Cajun_LS3
1969 coupe with an L46. VIN matches, but the engine ID code confuses me.
V 1 I 2 5 H W. (To be clear, that is the letter "I" following the number "1")

V=Flint, MI
1 I = ??
2 5 = 25th day
H W = 350ci/350hp, no A/C
The letter "I" is often used to represent the digit "1" in stamped numbers. Common practice with Chevy engines.

So 1 I is 11th month (November).
Old 02-19-2015, 10:24 PM
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Originally Posted by emccomas
The letter "I" is often used to represent the digit "1" in stamped numbers. Common practice with Chevy engines.

So 1 I is 11th month (November).
Makes sense. Besides the VIN, is there another stamp that could confirm that 1I=November?
Old 02-20-2015, 07:32 AM
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Revi
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Originally Posted by Cajun_LS3
Makes sense. Besides the VIN, is there another stamp that could confirm that 1I=November?
The date stamp on the engine (1I= Nov) is when the engine was built at Flint. The partial VIN that is stamped on the engine pad would have been applied in St Louis when the car was built. Your car could have been built a couple of weeks to a couple of months after the engine stamp date (Nov. 11, 1968 or 69). Your Trim Tag located on the drivers side door post will tell you when the car was built.

FYI - my car was built May 18, 1970, but the engine was assembled on March 25, 1970.

Last edited by Revi; 02-20-2015 at 07:39 AM.
Old 02-20-2015, 07:42 AM
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Originally Posted by Cajun_LS3
Makes sense. Besides the VIN, is there another stamp that could confirm that 1I=November?
There are no other "stamped" numbers, on the block, but there is a casting date. On the right side of the flange, that the bellhousing bolts to, you will find the date the block was cast. Normally, the block will have been cast within a few days of when the engine was assembled.

Obviously, the block would have to been cast prior to the engine's assembly date. This sounds pretty simple, but I have seen restamped blocks, with casting dates after the assembly date.
Old 02-20-2015, 08:05 PM
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If anyone has pictures of similar instances, I'd love to see them.
Old 02-20-2015, 08:27 PM
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Originally Posted by Cajun_LS3
1969 coupe with an L46. VIN matches, but the engine ID code confuses me.
V 1 I 2 5 H W. (To be clear, that is the letter "I" following the number "1")

V=Flint, MI
1 I = ??
2 5 = 25th day
H W = 350ci/350hp, no A/C
Cajun, have same car, can't remember engine code offhand, but a Nov. build. Vin 31xxx you should be close. I'll see if I can get pics tommorow, weather permitting

Last edited by Calo69; 02-20-2015 at 08:30 PM. Reason: Add
Old 02-20-2015, 08:31 PM
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Originally Posted by Calo69
Cajun, have same car, can't remember engine code offhand, but a Nov. build. Vin 31xxx you should be close
Thanks. If you have a picture, I'd love to see it.
Old 02-20-2015, 08:59 PM
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Originally Posted by Cajun_LS3
Thanks. If you have a picture, I'd love to see it.
If I get to car tommorow I'll get some pics, it's very stock, anything in particular you looking for?
Made mistake before vin is 34xxx should be closer
Old 02-21-2015, 05:53 AM
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Originally Posted by Calo69
If I get to car tommorow I'll get some pics, it's very stock, anything in particular you looking for?
Made mistake before vin is 34xxx should be closer
Mainly just the engine ID code and VIN on the stamp pad.
Old 02-21-2015, 07:40 AM
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Alan 71
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Hi C,
Here's a picture of a pad on which the 'I' stamp was used in place of the '1' stamp.
The picture was posted on the DB as part of the thread about the pad you're looking at.
Regards,
Alan

Old 02-21-2015, 08:08 AM
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Originally Posted by Cajun_LS3
...If anyone has pictures of similar instances, I'd love to see them...
Try Google Images. As Ed stated, it is very common to see an alpha I used in place of a numeric 1 in engine stamps. It is also common to see variations of numeric zeroes. Note the two in Alan's pic.^

Last edited by Easy Mike; 02-22-2015 at 09:11 AM.

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