Author Topic: Engine Pad Stamps  (Read 3118 times)

bcmiller

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Re: Engine Pad Stamps
« Reply #15 on: May 24, 2017, 02:18:59 AM »
The "O"'s in the engine date/code appear to be different. One is wider than the other.

That's not unusual.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

1968RSZ28

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Re: Engine Pad Stamps
« Reply #16 on: May 24, 2017, 02:39:51 AM »
The "O"'s in the engine date/code appear to be different. One is wider than the other.

The first "O" is a zero, so they are different characters. One zero and one "O". Just like when I type it, V0831MO. :)

Paul

X33RS

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Re: Engine Pad Stamps
« Reply #17 on: May 24, 2017, 03:52:06 PM »
Odd that they would care enough to be that critical about something like that when not much later you start to see stamps with the letter  "I" substituted for the number "1"

bcmiller

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Re: Engine Pad Stamps
« Reply #18 on: May 24, 2017, 04:07:53 PM »
I suspect the capital letter I was used more when the number 1 was in short supply. If a lot of ones were being used in the stampers, I was substituted. The letter O was not used in a lot of engine stamped codes.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

z28z11

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Re: Engine Pad Stamps
« Reply #19 on: May 29, 2017, 02:01:35 PM »
The "O"'s in the engine date/code appear to be different. One is wider than the other.

One is a letter, the other a numeral. The position and font of the MO suffix is correct - seen this on many examples, including the original I have in the garage. Appears legit -

JMO - 

Steve
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
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jdv69z

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Re: Engine Pad Stamps
« Reply #20 on: May 29, 2017, 04:16:01 PM »
Looks to me like the date was done with one stamp, the MO with a another. But that's a total guess on my part.
Jimmy V.

z28z11

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Re: Engine Pad Stamps
« Reply #21 on: May 30, 2017, 03:03:44 AM »
Looks to me like the date was done with one stamp, the MO with a another. But that's a total guess on my part.

Certainly appears that way - most verified original ones I've seen have the suffix a little off, like it was a second gang stamp.   
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

jdv69z

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Re: Engine Pad Stamps
« Reply #22 on: May 31, 2017, 12:40:19 PM »
If I remember reading correctly, (my memory is suspect) I think John Z indicated that at Norwood they would make a stamp each day for every engine combination to be run with the date/engine code. What if it was done differently at LA such that they used 2 stamps, one for the date, the other for the engine suffix. They would only have to make up one date stamp each day, and not a stamp for every date/engine code. Just a thought.
Jimmy V.

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Re: Engine Pad Stamps
« Reply #23 on: May 31, 2017, 01:03:01 PM »
Jimmy only the partial VINs were stamped at Norwood or LA, the engine assembly plants (Flint or Tonawanda) stamped the dated application code.
Tim - 04A VN '69 z/28 69-69 715 ex-E/MP

Mike S

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Re: Engine Pad Stamps
« Reply #24 on: May 31, 2017, 01:07:38 PM »
Jimmy only the partial VINs were stamped at Norwood or LA, the engine assembly plants (Flint or Tonawanda) stamped the dated application code so they should have been consistent.
And to add to what Tim stated, the engine suffix was stamped on the deck before the heads were mounted (at least for BB's....not sure about SB's), which would explain how some stamps can be so close to the heads that would otherwise make it impossible for a gang stamp to reach.

Mike
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jdv69z

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Re: Engine Pad Stamps
« Reply #25 on: May 31, 2017, 01:19:37 PM »
That's right, my bad! Told you my memory was suspect.  :)
Jimmy V.

BULLITT65

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Re: Engine Pad Stamps
« Reply #26 on: May 31, 2017, 03:14:17 PM »
I was thinking on the SB, that it was stamped with the heads on, and thats why some are a partial or stamped twice by the engine plant
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z28z11

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Re: Engine Pad Stamps
« Reply #27 on: June 01, 2017, 01:18:54 AM »
I was thinking on the SB, that it was stamped with the heads on, and thats why some are a partial or stamped twice by the engine plant

Pretty sure you're correct. Most small block stamps I've ever seen are far enough down on the edge to clear the stamp holder from the front face of the head, sometimes almost running off the pad. Big blocks have a core plug on the left side of the head over the pad: no way to get a stamp there unless you pull the core plug, which would be extremely difficult. That's why the engine code is on the side under the plug (before the heads were assembled to the block), and the VIN on pad stamped cars is in the clear (assembly plant stamping) on the open side of the pad. Makes sense -

Regards,
Steve
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

69Z28-RS

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Re: Engine Pad Stamps
« Reply #28 on: June 01, 2017, 03:28:13 AM »
I have no idea if that's a cause for 'double stamps', but JohnZ has stated previously that small blocks were stamped after the heads were installed...
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bcmiller

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Re: Engine Pad Stamps
« Reply #29 on: June 01, 2017, 05:14:22 AM »
That's not the reason for the double stamps, in my opinion. And double stamps are not that common.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016