Are these original 72 casting numbers
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Are these original 72 casting numbers
Hi all,
Been working on the rear end today of my 72 Coupe. I have a couple of casting numbers that I would like to clarify whether these are original please. I'll have more to add when I come across them.
Rear calipers brand- Delco Moraine CN-5473807
Also I found some stamps on my wheels. Be nice if these were the original wheels the car came out with or aftermarkets?
Casting number- GM K12
Been working on the rear end today of my 72 Coupe. I have a couple of casting numbers that I would like to clarify whether these are original please. I'll have more to add when I come across them.
Rear calipers brand- Delco Moraine CN-5473807
Also I found some stamps on my wheels. Be nice if these were the original wheels the car came out with or aftermarkets?
Casting number- GM K12
Last edited by Corvetteoz; Jan 13, 2017 at 10:12 AM.
Team Owner
Joined: Sep 2006
Posts: 31,301
Likes: 4,389
From: Westminster Maryland
Hi Coz,
I believe the casting numbers for the rear caliper halves used in production during the 70-72 era was 5452284 (outer) and 5452281 (inner).
The original rally wheels are typically stamped near the hub and also near the valve stem.
Here's an example of the coded stamps typically found near the stem and what they indicate..
Regards,
Alan
I believe the casting numbers for the rear caliper halves used in production during the 70-72 era was 5452284 (outer) and 5452281 (inner).
The original rally wheels are typically stamped near the hub and also near the valve stem.
Here's an example of the coded stamps typically found near the stem and what they indicate..
Regards,
Alan
Last edited by Alan 71; Jan 13, 2017 at 08:00 AM.
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Thanks Alan. I'll have a look tomorrow near the valve stem to see if there are anymore numbers.
Race Director
Joined: Jun 2005
Posts: 10,189
Likes: 206
2018 Corvette of Year Finalist
2017 C3 of Year
Here's a great chart for reference....
CORVETTE
BRAKE CALIPER CASTING NUMBERS
1965 - 1982
"First-Design"; 1965 and 1966 (and some very early 1967s, first few hundred Corvettes)
"Second-Design"; 1967 - 1971 (and some very early 1972s, first few hundred Corvettes)
"Third-Design"; 1972 - 1982 (the most common calipers on m Corvettes)
First Design Second Design Third Design
Front inner 5465954 5452270 5473795
Front outer 5495952 5452273 5473796
Rear inner 5465902 5452281 5473806
Rear outer 5465905 5452284 5473807
CORVETTE
BRAKE CALIPER CASTING NUMBERS
1965 - 1982
"First-Design"; 1965 and 1966 (and some very early 1967s, first few hundred Corvettes)
"Second-Design"; 1967 - 1971 (and some very early 1972s, first few hundred Corvettes)
"Third-Design"; 1972 - 1982 (the most common calipers on m Corvettes)
First Design Second Design Third Design
Front inner 5465954 5452270 5473795
Front outer 5495952 5452273 5473796
Rear inner 5465902 5452281 5473806
Rear outer 5465905 5452284 5473807
Last edited by Don Rickles; Jan 13, 2017 at 08:25 AM.
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Here's a great chart for reference....
CORVETTE
BRAKE CALIPER CASTING NUMBERS
1965 - 1982
"First-Design"; 1965 and 1966 (and some very early 1967s, first few hundred Corvettes)
"Second-Design"; 1967 - 1971 (and some very early 1972s, first few hundred Corvettes)
"Third-Design"; 1972 - 1982 (the most common calipers on m Corvettes)
First Design Second Design Third Design
Front inner 5465954 5452270 5473795
Front outer 5495952 5452273 5473796
Rear inner 5465902 5452281 5473806
Rear outer 5465905 5452284 5473807
CORVETTE
BRAKE CALIPER CASTING NUMBERS
1965 - 1982
"First-Design"; 1965 and 1966 (and some very early 1967s, first few hundred Corvettes)
"Second-Design"; 1967 - 1971 (and some very early 1972s, first few hundred Corvettes)
"Third-Design"; 1972 - 1982 (the most common calipers on m Corvettes)
First Design Second Design Third Design
Front inner 5465954 5452270 5473795
Front outer 5495952 5452273 5473796
Rear inner 5465902 5452281 5473806
Rear outer 5465905 5452284 5473807
I presume the outer is meaning the outer part of the caliper? Inner being the inside part of the caliper? I've only ever heard of 1 casting number for the whole caliper, not separate casting numbers for 2 halves
I plan to check the rotor runout on the fronts as well, I'll check those casting numbers too
Last edited by Corvetteoz; Jan 13, 2017 at 10:13 AM.
Team Owner
Joined: Sep 2006
Posts: 31,301
Likes: 4,389
From: Westminster Maryland
Hi Coz,
If you think about a 'complete caliper' has to have 2 casting numbers because the 2 halves for each caliper aren't symmetrical, so need 2 different castings/ 2 different numbers.
The complete caliper 'assembly' can have a single part number but is made of individual parts with their own casting numbers.
The 'assembly numbers' in the 71 AIM are 5452266/7 for a front caliper (there are right and left assemblies) and 5452268/9 for a rear caliper (there are right and left assemblies).
The assembly number doesn't appear on the caliper.
Regards,
Alan
If you think about a 'complete caliper' has to have 2 casting numbers because the 2 halves for each caliper aren't symmetrical, so need 2 different castings/ 2 different numbers.
The complete caliper 'assembly' can have a single part number but is made of individual parts with their own casting numbers.
The 'assembly numbers' in the 71 AIM are 5452266/7 for a front caliper (there are right and left assemblies) and 5452268/9 for a rear caliper (there are right and left assemblies).
The assembly number doesn't appear on the caliper.
Regards,
Alan
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Hi Coz,
If you think about a 'complete caliper' has to have 2 casting numbers because the 2 halves for each caliper aren't symmetrical, so need 2 different castings/ 2 different numbers.
The complete caliper 'assembly' can have a single part number but is made of individual parts with their own casting numbers.
The 'assembly numbers' in the 71 AIM are 5452266/7 for a front caliper (there are right and left assemblies) and 5452268/9 for a rear caliper (there are right and left assemblies).
The assembly number doesn't appear on the caliper.
Regards,
Alan
If you think about a 'complete caliper' has to have 2 casting numbers because the 2 halves for each caliper aren't symmetrical, so need 2 different castings/ 2 different numbers.
The complete caliper 'assembly' can have a single part number but is made of individual parts with their own casting numbers.
The 'assembly numbers' in the 71 AIM are 5452266/7 for a front caliper (there are right and left assemblies) and 5452268/9 for a rear caliper (there are right and left assemblies).
The assembly number doesn't appear on the caliper.
Regards,
Alan
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Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Ok took a photo of the numbers on the wheel today. Please tell me if these are original wheels which I suspect they are?
Looks like the numbers are K12 5 16 AZ. Car is a July 72 build with L10 on the build plate.
Looks like the numbers are K12 5 16 AZ. Car is a July 72 build with L10 on the build plate.
Last edited by Corvetteoz; Jan 15, 2017 at 05:08 AM.
Drifting
Joined: Jan 2004
Posts: 1,468
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From: Sherman CT
2023 C3 of the Year Finalist - Unmodified
2019 C3 of Year Finalist (stock)
St. Jude Donor '24-'25-'26
My car is also a July 1972 build, L13 on the trim tag
I have the exact same numbers stamped by the valve stem hole as you do, so yes...I would agree those wheels are the ones that came with your car when new!
Regards
Roy
I have the exact same numbers stamped by the valve stem hole as you do, so yes...I would agree those wheels are the ones that came with your car when new!
Regards
Roy
Drifting
Joined: Jan 2004
Posts: 1,468
Likes: 223
From: Sherman CT
2023 C3 of the Year Finalist - Unmodified
2019 C3 of Year Finalist (stock)
St. Jude Donor '24-'25-'26
Race Director
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From: Grapevine Tx
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2016 C3 of the Year Finalist
Always wondered if my wheels were original. Looks like they are!
Thread Starter
Racer
Joined: Mar 2016
Posts: 470
Likes: 31
From: Melbourne Victoria
Probably pretty normal I guess as they would have had less rally wheel stock at the start of the year versus the middle of the year.
Last edited by Corvetteoz; Jan 18, 2017 at 10:57 PM.