C3 Valve covers

[Peter S.]

Gents,

Where there any differences (besides the dripper-less '69s) in the L46/LT-1/L82 valve covers? From an NCRS standpoint, would one be able to distinguish between a set of 1969 L46 valve covers vs. a 1975 L82 valve covers?

Peter

[Michael D.]

Re: C3 Valve covers

Paint. L-82 valve covers are usually semi-flat black with the tops of the fins unpainted.

[David L.]

Re: C3 Valve covers

Peter,

I did some research on these valve covers a few years ago and this is what I have found.

1969 Corvette & Z28: Cast. # "P-3932418"
Without drippers, "cutouts" are 3" long

1970 Corvette & Z28: Cast # "P-3932417-LH", "P-3965543-LH", "P-3965544-RH"
Drippers are 11/16" wide @ bottom, 3/4" in height, "cutouts" are 3" long
These covers were possibly used on very late 69 Z28's made in Oct. & Nov. 1969.

1971-1972 Corvette & Z28: Cast. # "3989005 L.H.", "3965542 R.H."
Oil cap hole is round for black rubber oil cap, "cutouts" are 3" long

1973-1977 Corvette & 1973-1974 Z28: Cast. # "P 3965543 LH CBC", "P 3965544 RH'
Drippers are 5/8" wide, 5/8" in height, "cutouts" are 3 9/16" and 5" long

Dave

[Peter S.]

Re: C3 Valve covers

Paint. L-82 valve covers are usually semi-flat black with the tops of the fins unpainted.

Hi Michael,

The L-82 valve covers on the '75 were left as-cast aluminum.

Peter,

I did some research on these valve covers a few years ago and this is what I have found.

1969 Corvette & Z28: Cast. # "P-3932418"
Without drippers, "cutouts" are 3" long

1970 Corvette & Z28: Cast # "P-3932417-LH", "P-3965543-LH", "P-3965544-RH"
Drippers are 11/16" wide @ bottom, 3/4" in height, "cutouts" are 3" long
These covers were possibly used on very late 69 Z28's made in Oct. & Nov. 1969.

1971-1972 Corvette & Z28: Cast. # "3989005 L.H.", "3965542 R.H."
Oil cap hole is round for black rubber oil cap, "cutouts" are 3" long

1973-1977 Corvette & 1973-1974 Z28: Cast. # "P 3965543 LH CBC", "P 3965544 RH'
Drippers are 5/8" wide, 5/8" in height, "cutouts" are 3 9/16" and 5" long

Dave

Good info David. Can you define what you mean by "cutouts"?

[Russ S.]

Re: C3 Valve covers

Paint. L-82 valve covers are usually semi-flat black with the tops of the fins unpainted.

Only the newer years have paint. 73,74,75 and possibly later didn't have paint.

[David L.]

Re: C3 Valve covers

The "cutouts" are long thin notches along the edge of the valve cover on the intake side for clearance purposes. On the 69-72 covers there are 2 "cutouts" about 3" long by about 1/8" (or maybe 1/4") or so as best as I can remember.

[Steven B.]

Re: C3 Valve covers

'77 and older no paint,

[Peter S.]

Re: C3 Valve covers

Thanks David. valve covers.JPG