1949 Valve covers

[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

[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. 

[Thomas Lindholm CLC#13781]

Do you have any idea on what number it started? How many engines did have them?

[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.

 

[Thomas Lindholm CLC#13781]

Hi Jay
Thank's for that information
Thomas

[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.

[Karl Clements]

I have these rocker covers on my 49?