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Author Topic: No partial VIN on blocks  (Read 11049 times)
AFONEFE
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« on: May 13, 2007, 08:00:01 PM »

What is the groups consensus on engines that do not appear to have the partial VIN stamped on the block?  I am starting to see a few of them advertised as orginal blocks that the factory must have "forgotten" to stamp.  If this was so wouldn't the transmission also be without the VIN?  Just asking the question.  Thanks.
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69 Z/28 X-77
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sd1968z28
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« Reply #1 on: May 13, 2007, 08:23:30 PM »

i would think this was possible, but not common.  engine matches in my car as does all other components.  except no vin on trans, correct date ect. and i know it is original, so i guess some slipped buy.
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dab67
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« Reply #2 on: May 14, 2007, 05:08:57 AM »

There were inconsistencies in the first year of the Camaro with partial vins being stamped on the pad. After 67, this was not a problem. IMO if someone is advertising a 68 or 69 without a partial vin, I would be a little suspect.

Dave
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67rscnvt
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« Reply #3 on: May 31, 2007, 09:04:24 AM »

My 67 has no partial vin. I assumed it was a factory replacement. The date code is a month after the car build date.
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dab67
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« Reply #4 on: May 31, 2007, 09:37:05 AM »

I believe your block should have a "CE" stamped on the front pad if it is a replacement.
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JohnZ
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« Reply #5 on: May 31, 2007, 09:43:57 AM »

I believe your block should have a "CE" stamped on the front pad if it is a replacement.

Only if it was replaced during the 5/50 warranty period. Most likely that engine came from another car after the expiration of the warranty if it has a conventional pad stamp.
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'69 Z/28
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9T4Z
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« Reply #6 on: June 05, 2007, 01:17:12 PM »

A few pics.... could "decking the engine" remove the partial vin and still leave the Engine stamp??
« Last Edit: June 05, 2007, 01:26:38 PM by 9T4Z » Logged

Gary 9T4Z

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dab67
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« Reply #7 on: June 05, 2007, 01:54:53 PM »

Not sure if you can "partially deck" a block., That would be a question for John and Jerry to answer. I believe a block is decked to get it back to the proper angles and smoothness to accomodate the heads.

Dave
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9T4Z
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« Reply #8 on: June 05, 2007, 03:36:00 PM »

A friend with a 65 vette is having his engine rebuilt.  They are "decking" his block.  He CLAIMS that he is having his engine vin "restamped" by some Vette specialists who claim to have the authority to do so... and hence justify a fee of $400 for examination and authentication prior to doing the restamp...

Has anyone heard of this... he told me today when was in for a visit but I sort of acted a bit skeptical as if this was legit... then wouldn't it be another opening for "forgeries"?

anyone??
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Gary 9T4Z

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JohnZ
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« Reply #9 on: June 06, 2007, 01:49:54 PM »

A few pics.... could "decking the engine" remove the partial vin and still leave the Engine stamp??

You could do that with a 3-axis mill, but it would be VERY obvious.
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'69 Z/28
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JohnZ
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« Reply #10 on: June 06, 2007, 01:53:30 PM »

A friend with a 65 vette is having his engine rebuilt.  They are "decking" his block.  He CLAIMS that he is having his engine vin "restamped" by some Vette specialists who claim to have the authority to do so... and hence justify a fee of $400 for examination and authentication prior to doing the restamp...

Has anyone heard of this... he told me today when was in for a visit but I sort of acted a bit skeptical as if this was legit... then wouldn't it be another opening for "forgeries"?

anyone??

Nobody has the "authority" to restamp a block pad, but it's a very common practice, and has been going on for decades as a result of the quest for "matching numbers". $300-$500 is about the going rate for those who provide that "service".
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'69 Z/28
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jdv69z
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« Reply #11 on: June 06, 2007, 02:32:01 PM »

With the way things are going with these forgeries, is there any possibility of someone going to the trouble of setting up a broaching operation to replicate the original block deck machining process?? Is it possible? Would it be financially viable?

Jimmy V.
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Jimmy V.
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« Reply #12 on: June 07, 2007, 09:44:30 AM »

There are numerous methods used to replicate factory broach marks; some are better than others, but none of them will stand up under close scrutiny (magnification). It takes more than just parallel lines.
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'69 Z/28
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sebastien
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« Reply #13 on: June 08, 2007, 12:12:31 AM »

what is your opinion on this stamp.no partial vin on block but stamped on powerglide.
july 68 327

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Sebastien 68  327 rag top
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« Reply #14 on: June 08, 2007, 09:04:09 AM »

i am not an expert, but the numbers were in a gang style holder. the numbers should be staright. the M E at the end looks to have been stamped individually.
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