Re: 1970 Z28 VIN ON BLOCK
 

I had a 1968 427/335 Corvette with the original decked block. Heated the pad up with a torch and the #s came out in relief. I know it's risky, but the metal is actually compressed when it's stamped, and heating it up "relaxes" the compression. The #s actually are raised when it works.

Re: 1970 Z28 VIN ON BLOCK
 

Will map gas work?

Dave
67 Nova Boy

Re: 1970 Z28 VIN ON BLOCK
 

Why would it be "50/50" if its stamped by the oil filter? If the Vin# is there and its correct, matches paperwork ect.. then i would think thats enough.

Re: 1970 Z28 VIN ON BLOCK
 

vdavie, If clearly legible unmolested VIN # was stamped on bellhousing flange and it was appropriately matched with block casting date, I would agree that the decked block was born with the body.

It does detract from its desireability (IMO) and could well drive some buyers away.

Re: 1970 Z28 VIN ON BLOCK
 

[ QUOTE ]
Will map gas work?

Dave
67 Nova Boy

[/ QUOTE ]


This is not something for amateurs. You really have to know what you are doing. For example, when you try the raise the #s with heat, you have only one chance to do it as the cast iron molecules change from their original stamped, stressed state to a de-stressed position. The numbers may only be visible for a very brief amount of time for you to capture them with a camera. And if you dont know how to take a macro photograph properly you may have lost your one and only chance.

Re: 1970 Z28 VIN ON BLOCK
 

About 15 years ago, a guy from the V.I.B.(Vehicle Investigations Section) at the Illinois State Police we tow for out of Elgin, showed me how to use a metal shafted, cotton ball style, shoe polish applicator dipped in battery acid, and a battery charger to lift up decked numbers on a "440" cast 1968 396/375 short block I had.

The best thing about doing it this way, are that the numbers are still legible today, and according to his research, the engine is out of a Camaro delivered to Nickey Chevrolet on June 2nd,1968, my 12th Birthday!

It could have been a take out of a 427 converted car. I tried looking for the car buy Vin. but never found it.

Bill Pankiw

Re: 1970 Z28 VIN ON BLOCK
 

Not an amateur my friend....I have 31 years of forging with heat. I make high end fasteners for the space shuttle/boeing and work with all temps to very close tolences. Have I done a block? No!! Will I try...Will think this thru for sure. Oh yea....I made SPS rod bolts that we all used back in the day. Ya know what's in my motor. https://www.yenko.net/ubbthreads/imag...iggthumpup.gif Thanks for the info, well taken.

Dave
67 Nova Boy

Re: 1970 Z28 VIN ON BLOCK
 

[ QUOTE ]
Not an amateur my friend....I have 31 years of forging with heat. I make high end fasteners for the space shuttle/boeing and work with all temps to very close tolences. Have I done a block? No!! Will I try...Will think this thru for sure. Oh yea....I made SPS rod bolts that we all used back in the day. Ya know what's in my motor. https://www.yenko.net/ubbthreads/imag...iggthumpup.gif Thanks for the info, well taken.

Dave
67 Nova Boy

[/ QUOTE ]


I was not implying you were an amateur at anything other than raising stamped numbers off of a cast iron block.

I'm just giving some advice on the subject since I do have some experience with the process and one mistake using the destructive heat process and the numbers you were trying to raise will be gone forever.

Anyone attempting to raise a serial number would be much wiser to use a non-destructive method if they have not done it many times before, or at least practice on some non-valuable blocks beforehand.

Here is some background info and a company that sells the appropriate crime scene kit.

http://lucy.mrs.org/2006brazil/wedpix/j502.pdf

http://www.sciencedirect.com/science?_ob...fd9918b4c82bbf5

http://books.google.com/books?id=KMfs_ez...ALS&f=false

http://www.crime-scene.com/store/A-8108B.shtml

Re: 1970 Z28 VIN ON BLOCK
 

Thanks for the info. Has anybody tried this kit or one like it?

Re: 1970 Z28 VIN ON BLOCK
 

Yes....I was NOT trying to be rude in any way!! I was very thankful for the advise you have given my friend!! https://www.yenko.net/ubbthreads/imag...lins/beers.gif
I'm a very laid back person and easy to get along with. I'm new here and do not want to get anyone mad at me!! https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

Dave
67 Nova Boy