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1949 Valve covers

Started by Thomas Lindholm CLC#13781, May 12, 2021, 10:01:08 AM

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Thomas Lindholm CLC#13781

I found a pair of 331 valve covers with 2 center cover mounting studs instead of 4 holes. Anyone know more about them? Early or just on large series?
Thomas
Thomas Lindholm CLC#13781

Jay Friedman

The valve (rocker arm) covers with 2 center cover mounting studs instead of 4 holes are used on early 1949 motors.  92,554 Cadillacs were built in '49, and the early type covers were used until motor number 31,718. 
1949 Cadillac 6107 Club Coupe
1932 Ford V8 Phaeton (restored, not a rod).  Sold
Decatur, Georgia
CLC # 3210, since 1984
"If it won't work, get a bigger hammer."

Thomas Lindholm CLC#13781

Do you have any idea on what number it started? How many engines did have them?
Thomas Lindholm CLC#13781

Jay Friedman

All 1949 motors from the first one until the 31,718th used the valve covers with 2 rocker arm cover mounting studs.  From motor number 31,719 until 92,554 they used the later cover with 4 bolt holes around the perimeter of the cover, as did all motors from 1950 and later.

 
1949 Cadillac 6107 Club Coupe
1932 Ford V8 Phaeton (restored, not a rod).  Sold
Decatur, Georgia
CLC # 3210, since 1984
"If it won't work, get a bigger hammer."

Thomas Lindholm CLC#13781

Hi Jay
Thank's for that information
Thomas
Thomas Lindholm CLC#13781

Caddy Wizard

Early 49 valve covers had silver lettering and striping, I think. Later ones had white.  But I don't know if that change coincided with the change from 2-bolt covers to 4-screw covers.
Art Gardner


1955 S60 Fleetwood sedan (now under resto -- has been in paint shop since June 2022!)
1955 S62 Coupe (future show car? 2/3 done)
1958 Eldo Seville (2/3 done)

Karl Clements

I have these rocker covers on my 49?