1957 Couoe de Ville -early or late model ???

[Caddy Daniel]

Hello everybody.
I've got a 1957 Coupe de Ville and for parts they ask if it's an early or late 1957 model
My VIN number is 5762058012 .... Early or late 57' model, I don't know, can anybody help me ?
Many thanks

Daniel Koppes

[Coupe]

You have the "late"model if the vin and engine # are the same. According to my information, at engine # 043297 changes were made to the lifters and push rods. The lifters were a little taller and the push rods shorter. I have been told that at some time in '57 the front sprague in the transmission was changed. I have also heard the sprague was changed for '58. Those are the only differences that I am aware of. Be sure to verify your engine # if ordering parts for the valve train. "Late" lifters can be used in an early engine as long as the "late" push rod is used and vice versa.

[J Kjerrulf]

Most of the mid-year changes to the transmission appears to have been made during model year of 1956. Have found the following changes on series 60, 62 with the 300hp engine during 1957:

Shift valve body + spacer channel plate to valve bodies: After C-16406
Front oil pump sprag assy: After C-63548
Coupling valve body + plate channel: After C-64695

If your 1957 has air contitioner it still may be considered kind of "early" - Serviceman supplement of August 15 1956 mentions a six bladed fan for cars equipped with A/C and a history of overheating. This six bladed fan was replaced on "later" 1957 models. (series 60, 62) but in use at least until around #57-43000. I believe "later" A/C cars doesn't have the 4-ribbed crank pulley either.

Anyone with a different opinion please clarify

J Kjerrulf

[Daniel Koppes]

This helps !!! Thanks a lot everybody for your answers !!
Daniel