[C1] Casting flaw in aluminum valve covers
03-11-2019, 11:32 AM
#1
Drifting
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Casting flaw in aluminum valve covers
Okay, I've been told the aluminum valve covers for the higher HP 327's had a casting flaw that went through the "O", but only on 1966 and later engines. But, parts houses act like the flaw is correct for the 62's with 340 or 360 HP. Which is correct for 62....flaw or no flaw?
Butch
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03-11-2019, 12:04 PM
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And apparently there was only one mold for ALL the valve covers. So every one cast after 66 has the flaw. Even the ones today as they are using the same tooling
03-11-2019, 12:12 PM
#4
Team Owner
Okay, I've been told the aluminum valve covers for the higher HP 327's had a casting flaw that went through the "O", but only on 1966 and later engines. But, parts houses act like the flaw is correct for the 62's with 340 or 360 HP. Which is correct for 62....flaw or no flaw?
Butch
Butch
Not original...
03-11-2019, 01:07 PM
#6
Team Owner
NON-flawed... The mold cracked in mid-66 and subsequent covers have the crack - its that simple..
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Dreaming60’s (03-11-2019)
03-11-2019, 01:19 PM
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Look for these currently on EBAY. No comment about the price.
You want original mid 59--67 NON staggered holes, NO casting flaw.
https://www.ebay.com/itm/Late-1959-1...UAAOSwPfBb17HT
03-11-2019, 01:29 PM
#8
Team Owner
NO flaw, and it's highly unlikely that you'll find NOS ones.
Look for these currently on EBAY. No comment about the price.
You want original mid 59--67 NON staggered holes, NO casting flaw.
https://www.ebay.com/itm/Late-1959-1...UAAOSwPfBb17HT
Look for these currently on EBAY. No comment about the price.
You want original mid 59--67 NON staggered holes, NO casting flaw.
https://www.ebay.com/itm/Late-1959-1...UAAOSwPfBb17HT
03-11-2019, 01:35 PM
#9
Drifting
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Thanks Chuck,
I don't need numbers matching and some of the vendors sell flaw corrected covers. The ones installed on this car at restoration were bought at Carlisle and apparently the restorer didn't know the difference. MIght change them out and might not, certainly not a priority, just wanted to know what was right.
Butch
I don't need numbers matching and some of the vendors sell flaw corrected covers. The ones installed on this car at restoration were bought at Carlisle and apparently the restorer didn't know the difference. MIght change them out and might not, certainly not a priority, just wanted to know what was right.
Butch
03-11-2019, 01:42 PM
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Thanks Chuck,
I don't need numbers matching and some of the vendors sell flaw corrected covers. The ones installed on this car at restoration were bought at Carlisle and apparently the restorer didn't know the difference. MIght change them out and might not, certainly not a priority, just wanted to know what was right.
Butch
I don't need numbers matching and some of the vendors sell flaw corrected covers. The ones installed on this car at restoration were bought at Carlisle and apparently the restorer didn't know the difference. MIght change them out and might not, certainly not a priority, just wanted to know what was right.
Butch
The flaw corrected covers I’ve seen leave a bit to be desired.
Treat yourself. Buy the best and only cry once. 😀
03-11-2019, 02:05 PM
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OK, LET'S TRY TO CLEAR THIS UP ONCE AND FOR ALL!!!!!!!!!!!!! THIS QUESTION COMES UP ALL THE TIME.
FINNED VALVE COVERS WITH THE LINE THROUGH THE o, BEGAN SHOWING UP DURING MID 1966 PRODUCTION.
NOTHING, ZERO, ZIP, NADA-------------PRODUCTION OR SERVICE REPLACEMENT PARTS, FROM THE CHEVY PARTS DEPT, DID NOT, DID NOT, DID NOT HAVE THE FLAW PRIOR TO MID 1966 PRODUCTION! NO IF's, AND's, BUT's OR MAYBE's!
THUS, ANY, ANY, ANY, ANY 60 THROUGH EARLY PRODUCTION 66 CORVETTE SHOULD NOT HAVE FLAWED VALVE COVERS-----------NO MATTER WHAT ENGINE OPTION THE CAR HAS!!!!!!!!!!!!!!
FINNED VALVE COVERS WITH THE LINE THROUGH THE o, BEGAN SHOWING UP DURING MID 1966 PRODUCTION.
NOTHING, ZERO, ZIP, NADA-------------PRODUCTION OR SERVICE REPLACEMENT PARTS, FROM THE CHEVY PARTS DEPT, DID NOT, DID NOT, DID NOT HAVE THE FLAW PRIOR TO MID 1966 PRODUCTION! NO IF's, AND's, BUT's OR MAYBE's!
THUS, ANY, ANY, ANY, ANY 60 THROUGH EARLY PRODUCTION 66 CORVETTE SHOULD NOT HAVE FLAWED VALVE COVERS-----------NO MATTER WHAT ENGINE OPTION THE CAR HAS!!!!!!!!!!!!!!
03-11-2019, 02:10 PM
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The valve covers, which some vendors sell, and have SUPPOSEDLY eliminated the flaw-------------------the flaw can easily be seen when examined closely. I have NEVER seen a valve cover with the flaw removed, that cannot still be detected. The flaw goes down into the metal to such an extent that it can still be seen.
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Chuck Gongloff (03-11-2019)
03-11-2019, 02:30 PM
#13
Drifting
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Great information guys! I now know what I'm supposed to have and what to look for. I'll never be judge (well, my car won't) so I have time to think about this. It's the education I was wanting, which also lets me know about the honesty of the vendors who are selling them as correct for engines prior to 1966. I know they can't know every......but.
BH
BH
03-11-2019, 05:11 PM
#14
Drifting
Another thing is the crack and O in Corvette got very ugly looking over the years as they continued to use the original mold. Some owners use a dremel to get some of the aluminum flash out.
03-11-2019, 07:21 PM
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OK, LET'S TRY TO CLEAR THIS UP ONCE AND FOR ALL!!!!!!!!!!!!! THIS QUESTION COMES UP ALL THE TIME.
FINNED VALVE COVERS WITH THE LINE THROUGH THE o, BEGAN SHOWING UP DURING MID 1966 PRODUCTION.
NOTHING, ZERO, ZIP, NADA-------------PRODUCTION OR SERVICE REPLACEMENT PARTS, FROM THE CHEVY PARTS DEPT, DID NOT, DID NOT, DID NOT HAVE THE FLAW PRIOR TO MID 1966 PRODUCTION! NO IF's, AND's, BUT's OR MAYBE's!
THUS, ANY, ANY, ANY, ANY 60 THROUGH EARLY PRODUCTION 66 CORVETTE SHOULD NOT HAVE FLAWED VALVE COVERS-----------NO MATTER WHAT ENGINE OPTION THE CAR HAS!!!!!!!!!!!!!!
FINNED VALVE COVERS WITH THE LINE THROUGH THE o, BEGAN SHOWING UP DURING MID 1966 PRODUCTION.
NOTHING, ZERO, ZIP, NADA-------------PRODUCTION OR SERVICE REPLACEMENT PARTS, FROM THE CHEVY PARTS DEPT, DID NOT, DID NOT, DID NOT HAVE THE FLAW PRIOR TO MID 1966 PRODUCTION! NO IF's, AND's, BUT's OR MAYBE's!
THUS, ANY, ANY, ANY, ANY 60 THROUGH EARLY PRODUCTION 66 CORVETTE SHOULD NOT HAVE FLAWED VALVE COVERS-----------NO MATTER WHAT ENGINE OPTION THE CAR HAS!!!!!!!!!!!!!!
Thank you
03-11-2019, 08:06 PM
#17
Le Mans Master
03-11-2019, 08:13 PM
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03-11-2019, 08:21 PM
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