Water pump--- 3890419ct

power steering ( on crank )--- 3751232bb

crank--- 3850838bg

also are there any date codes on the stamped pulleys?

thanks, Stan

ttt

Hello Stan,

I found all three of your part numbers in a couple of my parts books and in my 66 Chevelle Assembly manual. I only found references to the basic part numbers though and not including the two character suffixes. One of my parts books is dated 1969 and lists the 3 part numbers for various Passenger, Corvette, and truck applications. My other parts book, dated October of 1965, includes Chevelle applications.

I'll just list the Chevelle applications, from the Oct. 65 book, and a comment from looking at the assembly manual.

3890419
64 - 66 Chevelle 8 cyl (exc A.I.R.)

My assembly manual confirms that this water pump pulley is used on 283s and 327s except those with smog pumps.

3751232
64 Chevelle w/PS (8cyl) (exc. Air Cond)
64 - 66 Chevelle w/P/S 8 cyl front

My assembly manual shows this is the power steering pulley that is attached to the front of the existing crank pulley.

3850838
64 - 66 Chevelle w/Air Cond (283, 327)

This is the crank pulley, apparently 2 tracks, for air conditioned small blocks.

I don't have any information on the 2 character suffixes. My 66 big block pulleys have suffixes (uppercase letters). I found no date codes; just the partnumber/suffix, GM, and an S or P stamped in my pulleys.