Has my block been decked?
Le Mans Master
Joined: Nov 2001
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From: LONG ISLAND
2025 C3 ('68-'73) of the Year Finalist - Unmodified
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I have not heard of a pad being missed twice. VIN derivative could have been missed at St. Louis, but not likely. The quality control guys looked for things like that. Ditto for a missing engine code stamp prior to leaving Flint. Not likely. Still, stranger things have happened.
It's possible the block was replaced in Heavy Repair at St. Louis before the car was shipped, but in those instances the VIN restamp is almost always noticeable.
I think I can see feint partial numbers. Decked.
It's possible the block was replaced in Heavy Repair at St. Louis before the car was shipped, but in those instances the VIN restamp is almost always noticeable.
I think I can see feint partial numbers. Decked.
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
If a warranty repair, it would have had a CE number put on at the dealership, I think. Over-the-counter block purchase is likely. Is there some "approved" method for re-identifying that block with your car? [I'm not suggesting the original numbering method.]
Thread Starter
Race Director
Joined: Apr 2003
Posts: 19,348
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From: Tampa, Florida
My engine has an intake from a 1968 corvette. I'll pull the valve covers to see what kind of heads I'm dealing with. For now the engine stays as is. I have other 'issues'.
Racer
Joined: Sep 2004
Posts: 482
Likes: 1
From: Brandon Manitoba
If this block had been rebuilt and decked is this what the block would look like ? For a guy that is rebuiding his motor and decking it how do you preserve the matching numbers during the decking proceedure ?
Thread Starter
Race Director
Joined: Apr 2003
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From: Tampa, Florida
do a search....
Team Owner
Joined: Jun 2000
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From: Southbound
Cruise-In II Veteran
Tell him FIRST, before any machining is done, and make sure he knows the value of the numbers and why you want to keep them. Have a very clear understanding between the two of you before you hand your block over to him.
But, first things first, does your block actually need to be decked? Most don't.
But, first things first, does your block actually need to be decked? Most don't.
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Burning Brakes
Joined: Nov 2005
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From: Marengo Illinois
Cruise-In VIII Veteran
St. Jude Donor '06
I had my original '71 LT-1 block decked and they left the pad alone to keep it #'s matching. Decking may not be necessary but a zero deck block does increase CR
Safety Car
Joined: Feb 2006
Posts: 4,367
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From: FL
Also, if they can't grasp the concept that the numbers are VERY important to you, see if he can grasp the concept that it will cost him about $10,000 to $50,000 depending on the car it belongs in.
Heel & Toe
Joined: Feb 2007
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Melting Slicks
Joined: Jan 2004
Posts: 2,527
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From: St. Petersburg, Fl///Columbus, Ohio
CALL THE POLICE!!!!!
NO kidding..... they have a chemical they use on guns to retrieve the serial # if it's been ground off
I didn't read the whole thread before posting
NO kidding..... they have a chemical they use on guns to retrieve the serial # if it's been ground off
I didn't read the whole thread before posting
Last edited by jcswm; Mar 17, 2007 at 01:12 AM.
Instructor
Joined: Aug 2005
Posts: 234
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From: Covington, Virginia
the block has been machined at the head to block mating surface (where the head gasket goes) and this can be done for several reasons. It is possible for a block to warp, decking a warped block will make it flat and true again. Decking can also be done to raise the compression (NOT RECOMMENDED). To deck a block and remove the sn from the block might require as much as .040 to be removed, which is considerable on that surface. This is most often a grinding process, rather large flat grinding wheel comes into contact with the deck surface and material is removed until the desired results are achieved. Most often, if one side needs to be decked??? both sides get it....
Drifting
Joined: Sep 1999
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