Factort Regrind On Sn

[Kenneth B.]

Please look at this pad. I bleave it is a factory regrind. Dont have the 435 Corvette only the engine,
KEN BARRY

[Rich G.]

Re: Factort Regrind On Sn

There was a thread on this about 6 months ago with several good pictures and several good comments. I'll see if I can find it.

[Rich G.]

Re: Factort Regrind On Sn

Try this:

https://www.forums.ncrs.org/showthread.php?t=70745&highlight=factory+grind&uid=2889

[Kenneth B.]

Re: Factort Regrind On Sn

There was a thread on this about 6 months ago with several good pictures and several good comments. I'll see if I can find it.

Thanks
Every thing on the pad looks good as far as the broch marks & stamps. Looks like another # was stamped where it was ground. Only ground where the SN is.I can feel a indentation where it was ground. When it was done whoever did it was carefull to only grind the SN. I think I can see some of the original #'S.
KEN

[Loren L.]

Re: Factort Regrind On Sn

It would seem to me to be far more likely on the suffix code than on the VIN; ie, close of a model year where an engine casting # will change for next year; late '65 order for an L76; engine room empty of L76 and solution is pick an L79 and shoot the block over to the heavy line for a changeout of cam/lifters and restamp the last letter.

[Joe L.]

Re: Factort Regrind On Sn

Thanks
Every thing on the pad looks good as far as the broch marks & stamps. Looks like another # was stamped where it was ground. Only ground where the SN is.I can feel a indentation where it was ground. When it was done whoever did it was carefull to only grind the SN. I think I can see some of the original #'S.
KEN

Ken------


I've seen a fair number of these that I believed to be legitimate. The method of grind-out and restamp varied slightly, probably as a function of the person doing the restamp. As I recall, GM had a policy that if only one or two characters were incorrect, they were to be "X'd" out and correct characters stamped above the "X's". In most cases I would expect that the characters would only be off for the last 1 or 2 digits (i.e. I expect the most common error was to stamp the VIN derivative without changing the gang stamp from the previous car). However, the vast majority of the "corrections" I've seen are just like this one---all or most of the VIN derivative ground out and a complete new stamping. I expect it was easier to do this than "X" out the incorrect characters and stamp new characters above them. There were plenty of air grinders around to do the grind out.

[Alan S.]

Re: Factort Regrind On Sn

Hi Joe,
I never thought about it until you mentioned the Xs.
My 71's original 4-speed case has a VIN derivative completely X'd out with the new/proper derivative next to it.
So I guess the case couldn't be ground to cancel the original stamping?
Regards,
Alan

[Edward M.]

Re: Factort Regrind On Sn

I used to own a base motor 73 convertible that had a VIN correction on the engine pad and the transmission. On both stamps, the very last digit was originally an '8', then overstamped with a '7'. The '7' was the correct digit.

No characters were 'X'ed out, but the overstamp was obvious.

[Kenneth B.]

Re: Factort Regrind On Sn

Ken------


I've seen a fair number of these that I believed to be legitimate. The method of grind-out and restamp varied slightly, probably as a function of the person doing the restamp. As I recall, GM had a policy that if only one or two characters were incorrect, they were to be "X'd" out and correct characters stamped above the "X's". In most cases I would expect that the characters would only be off for the last 1 or 2 digits (i.e. I expect the most common error was to stamp the VIN derivative without changing the gang stamp from the previous car). However, the vast majority of the "corrections" I've seen are just like this one---all or most of the VIN derivative ground out and a complete new stamping. I expect it was easier to do this than "X" out the incorrect characters and stamp new characters above them. There were plenty of air grinders around to do the grind out.

Thanks Joe
I don't care as I only have the engine that I got with the 67 that I brught from the wife of my friend that died. He bought it 20 years ago. No reason to restasmp it. Thought NCRS judges would like to see what really went on on the ass. line.
KEN

[Tim G.]

Re: Factort Regrind On Sn

I owned 1965 Corvette #21654, a very late production 250 HP, automatic coupe. Quite a basic car in the Corvette world, but it had 16,000 original miles and was an amazing original car. I took it to Waco in 2005 and let it be judged with it's ground pad. Al was the engine judge and he loved it.

Who would mess with this car, the warranty gaskets were still in place and it was a no option base motor coupe.

[Tim G.]

Re: Factort Regrind On Sn

Here's another shot.

[Kenneth B.]

Re: Factort Regrind On Sn

Here's another shot.

TIM
Lucky you got Al. Before I went to his seminar I would have bet money that my pad had been messed with. It would be nice to find someone that owns that Corvette but my guess is that it was totaled years ago. Very early car # 302.
KEN