Restamped blocks using a CNC

[Keith B.]

A issue occurred at a judging meet where a stamp pad on a low optioned 327/300 was deemed to be non typical pad surface and the "stamping" done by a CNC using dot matrix engraving. But upon further cleaning the pad with a cleaner to remove a proactive oil it was deemed a factory stamp but still a non typical finish. While the owner believes doing machine work the block may have been sandblasted to clean things up which would warrant the non typical finish. So no argument there.

however how often are team leaders finding "restamped" engines pads using the dot matrix engraving.

[Larry E.]

Re: Restamped blocks using a CNC

Keith or Anybody>Like to see a picture on the above process. Never heard of this before. Larry

[Keith B.]

Re: Restamped blocks using a CNC

Well Larry I believe C4 era GM pads are done that way. But I never seen one out side of a GM done pad.

[Gary J.]

Re: Restamped blocks using a CNC

Did you take a picture of the pad?

[Mark F.]

Re: Restamped blocks using a CNC

This is on aluminum, but I'm guessing the concept is the same for cast iron.
Also interesting that these can be scanned...

https://www.google.com/search?q=cnc+dot+matrix+engraving&rlz=1C1VDKB_enUS1040US1040&oq=cnc+dot+matrix+engraving&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQIRigATIHCAIQIRigATIHCAMQIRigATIHCAQQIRigATIHCAUQIRigAdIBCDc3ODhqMGo3qAIAsAIA&sourceid=chrome&ie=UTF-8#fpstate=ive&vld=cid:04c8f1d9,vid:LG1SQMj1Lio,st:0

[Mark L.]

Re: Restamped blocks using a CNC

The picture is of a 92 LT1. The block is iron and this looks like a stamp. I believe the ZR1 was a dot matrix.

[Brian M.]

Re: Restamped blocks using a CNC

I believe the C4 VIN number is a dot matrix.
i am in Las Vegas and do not have access to my computer to provide an example.

[Mark L.]

Re: Restamped blocks using a CNC

This is the vin stamp. Very poor picture but I believe it is also a stamp.92vinpad 004_LI.jpg

[Brian M.]

Re: Restamped blocks using a CNC

Mark,
You are correct, it is a stamp.
This was taken from a block out of the car.
C4 VIN.jpg

[Mark L.]

Re: Restamped blocks using a CNC

Thanks Brian. That is the best picture of a C4 block vin I have ever seen! Hope you came home with some of your money!

[Patrick B.]

Re: Restamped blocks using a CNC

Is N the plant code for Bowling Green or is this a Norwood Camaro? Except for the final 2, these are strange characters, but they still looked stamped.