1970 Z28 VIN ON BLOCK

[ALLZS]

IF A BLOCK HAS BEEN DECKED BUT STILL HAS THE VIN BY THE OIL FILTER DOES THAT COUNT AS THE ORIGINAL ENGINE EVEN THOUGH THE DECK HAS BEEN CUT ?

[m22mike]

I would say it is 50% better than no #'s at all. And the Vin # being the most important of the two. http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif JMO

[black69]

depending on the type of car (mopar, chevy), I would have to see how the stamp compares with the one on the trans. I think they should look similar, but for now I am not 100% sure if there are exceptions. If they are completely different then I would make sure you know why they are different before buying. I personally get nervous when the matching numbers trans is missing, as it provides no comparision.

[StriperSS]

Isn't there a way of 'seeing' the numbers on a decked block by magnetic means. I heard this years ago and wonder if it's true or an urban myth. It seems to me that law enforcement agencies could pull up serial numbers from guns and blocks that had been filed or ground off.
The stamping disturbs the metal molecules in the areas around and under the actual stamp, so even though a layer of metal has been removed, the disturbed area still exists, and can be read with some means.
Any opinions or knowledge on this?

[67 Nova Boy]

I would be interested in this as well. My block was decked in 1974. It is the original 327 out of my 67 Nova SS. Are there any other vins or stampings on the block?

Dave
67 Nova Boy

[Nova Research Project]

There are a few methods to do this. Magnaflux is what I think you are talking about. There is also the acid approach. However I think you only get one shot with that one. Acid kits are available for about $125 with more stuff than you need. Might make sense to contact local law enforcement to see if the have a list of contractor that do that type of work and has the mag kit.

Forensic Ballistics - Recovering Hidden Serial Numbers From Firearms (http://ezinearticles.com/?Forensic-Ballistics---Recovering-Hidden-Serial-Numbers-From-Firearms&id=917211)

Greg

[Ricks72Z28]

On 70's Z28 the VIN# was only stamped by the Oil Filter, engine code was on the deck.And yes that would count as original.

[1969z280]

Rick:

Actually, all Van Nuys cars appear to have been VIN stamped on the pad. Also, I have seen some Norwood cars that are pad stamped. I had one 1972 that's pad stamped and was just resold on ebay this week. I don't think there are any absolutes with these cars. JMHO, Ed

[TDW]

My 70, VN built, 03C, had the VIN stamped on the pad.

[ALLZS]

THIS CAR IS A MID YEAR NORWOOD BUILT CAR

[bergy]

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.

[67 Nova Boy]

Will map gas work?

Dave
67 Nova Boy

[vdavie]

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.

[CamarosRus]

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.

[njsteve]

[ 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.

[Big Block Bill]

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

[67 Nova Boy]

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. http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif Thanks for the info, well taken.

Dave
67 Nova Boy

[njsteve]

[ 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. http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.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://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B8JJ5-4SDG772-9&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&_doc anchor=&view=c&_searchStrId=1148728134&_rerunOrigi n=google&_acct=C000050221&_version=1&_urlVersion=0 &_userid=10&md5=cd60c760947713de4fd9918b4c82bbf 5)

http://books.google.com/books?id=KMfs_ez...ALS&f=false (http://books.google.com/books?id=KMfs_ezuWdMC&pg=PA407&lpg=PA407&dq=SERIAL +NUMBER+RESTORATION+IN+METALS&source=bl&ots=Lr4ZKF xo4C&sig=2LF5qliljIr9bulUBuFjFTr3i84&hl=en&ei=7IY5 S9TXHMyOlAeZqb2QBw&sa=X&oi=book_result&ct=result&r esnum=1&ved=0CAgQ6AEwADgK#v=onepage&q=SERIAL%20NUM BER%20RESTORATION%20IN%20METALS&f=false)

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

[vdavie]

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

[67 Nova Boy]

Yes....I was NOT trying to be rude in any way!! I was very thankful for the advise you have given my friend!! http://www.yenko.net/ubbthreads/images/graemlins/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!! http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif

Dave
67 Nova Boy

[67 Nova Boy]

My company I work for...We use all types of ACID to bring out heat patterns of bolts and was thinking that it might work on bringing out the VINS.on my block.

Dave
67 Nova Boy

[njsteve]

[ QUOTE ]
Yes....I was NOT trying to be rude in any way!! I was very thankful for the advise you have given my friend!! http://www.yenko.net/ubbthreads/images/graemlins/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!! http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif

Dave
67 Nova Boy

[/ QUOTE ]


No problem.

Just looking out for my fellow car guys (you're included). http://www.yenko.net/ubbthreads/images/graemlins/beers.gif

BTW, as a machinist do you have access to a magnaflux machine? There is a non-destructive method to see the numbers with a magnafluxer.

[vdavie]

Well i guess its worth a try. I'll order it and see what happens.

[67 Nova Boy]

I think we do?? But there would be no way for me to bring it in to the plant. We have this "NO" government jobs allowed! http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif The managers ruined that one for us. But will look into the acid method or the kits you have listed.

It would be great to see the numbers that have been gone for 35 years. http://www.yenko.net/ubbthreads/images/graemlins/headbang.gif

Dave
67 Nova Boy