what was 9 fin valve covers orginally put on a corvette


Asked by Mar 19, 2013 at 03:32 AM about the 1957 Chevrolet Corvette Coupe

Question type: General

3 Answers

Strictly aesthetics, just for looks. No real function. Although Corvette aluminum valve covers look pretty much the same to the untrained eye, there were actually six different variations of them used from 1956-1967. 1. 1956 2x4 engines used P/N 3726086: (9) fins, low (.030”) script, staggered bolt holes, and no notches in the upper seal flange. 2. Later 1956 2x4 engines with a revised intake manifold having larger runners required two cutouts to be added to the upper seal flange to clear the larger intake runners, starting about S/N 1650 (650th car built). There was no part number change, and these covers carried into ’57 production. 3. When fuel injection was introduced in 1957, an interference was found between the air meter and the upper fin on the valve cover, and the middle area of the top fin was milled off on fuel injection engines, starting about S/N 1900. 2x4 engines continued to use the “un-milled” 9-fin valve cover. Again, no part number change

2 out of 2 people think this is helpful.

It's about time I got the right stuff I have a pair that I got about 20 years ago for just $135 I don't have a corvette but what i do have is a 57 Chevy 210 sedan that was a 6 cylinder and a modified it to a almost correct 57 corvette engine and true story it was a preacher car and it's unrestored and wins all the time at shows not that i really care I've own it for almost 25 years will put picture in later and i have a picture of Zora Dunduff at Franklin Mint 30th anavrsaty of the vett i had nothing for him to sign i had a vett shirt on with the older cross flags on so i toke it off right in front of him and he signed it it happen to be a friend close by and he toke a good shot of it will also put that in the photos mite even donate it THANKS DAVID ROCKETMAN

You're welcome rocketman, happy to help

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