Pre-war (up to 1942) 40 & earlier lifter plungers interchange

[Bob Hoffmann CLC#96]

What is the difference between the 40 & earlier lifter plungers & the 41 & later ones. Will they interchange??
Thanks, Bob

[Warren Rauch #4286]

      Cadillac Serviceman March-April 1944 page 8

     There is a nice illustration of both types and some dimensions.

      The difference is in the body length of the larger diameter part of the plunger.

       1936-40 is 1 7/64 inches
       1941-early 48 is 59/64 inches

      The body part that the plunger fits in also different

       1936-40  is 1 3/32 inches long for the counterbore for the plunger
       1941-early48  is 29/32 inches"  "   "    "          "    "   "


     The parts books are clear you can't mix them. They are not clear if you use both plunger and body whether the unit will interchange.   

Warren

[harry s]

My understanding is the complete lifer assembly will interchange for all years but the individual components will not. I used a complete set of third generation lifters for the late '48s in a '39 LaSalle which worked fine.    Harry

[Bob Hoffmann CLC#96]

Does that mean using the early bodies to go with the early plungers?

[Warren Rauch #4286]

      That is exactly what that means, Bob. The early bodies must be used with the early plungers.

   There were three types of lifters used from 1936-48. I'll call them types 1-2-3.From what Harry did we know they interchange as sets.

         Type 1 1936-40  Plunger and body separate

         type 2  1941- early1948  Plunger and body separate

         type 3  late 1948   Unit type   plunger and body one piece

The plunger/body types are counterbored to different depths,so they must match. To work.

Warren

[Bob Hoffmann CLC#96]

Thanks to everyone that responded.
 Bob