WATER PUMP #3992077

[Doug J.]

IS IT POSSIBLE THAT A 1972, 454 WATER PUMP COULD HAVE A CAST # OF 3992077 WITH A DATE CODE OF L2071. I THOUGHT THIS WAS AN EARLIER APPLICATION. REF EBAY # 4546932899 THANKS DOUG

[Joe L.]

Re: WATER PUMP #3992077

Doug-----

Not only is it possible, it's PROBABLE. The 3992077 casting waterpump was used for most, if not all, 1972 Corvette big block applications. It's a virtual certainty that earlier 1972's used it and the date code of "L2071" (December 20, 1971) would be considered a correct date code for any 1972 Corvette with LS-5 built during the January through June, 1972 period. Most likley, though, if it was originally installed on a Corvette, it was one built in January or February, 1972.

The 3992077 waterpump casting, known as GM PART #3998214 for the complete waterpump, was used only for 1971-72 Corvettes and some 1971-72 MD/HD trucks. So, the "original residence" of the pump on eBay has to be either a 1972 Corvette LS-5, a 1972 MD/HD truck, or a SERVICE pump originally sold in 1972.

[Doug J.]

Re: WATER PUMP #3992077

WHERE DOES CAST # 386100 COME INTO PLAY. A COUPLE OF RESTO BOOKS SHOW THIS # THE BE THE ONE FOR 1972 W/454 ????

[Joe L.]

Re: WATER PUMP #3992077

Doug-----

GM casting #386100 was first used for the 1973 model year. I would not rule out the possibility that very late 1972 with LS-5 used it. However, I would more expect that early 1973 used the 3992077 than I would expect the 386100 to have been used for late 1972. It's possible, though. For the most part, if not exclusively, the 3992077 was used for the 1972 model year.

[Doug J.]

Re: WATER PUMP #3992077

THANK YOU JOE....YOU'VE BEEN A BIG HELP IN THE WATER PUMP NUMBERS DEPT. I PURCHASED THE ONE ON EBAY. MY 72 BIG BLOCK WAS BUILT ON FEB.10,1972 SO I SHOULD BE IN THE BALLPARK. (I'M STILL LOOKING FOR THE CORRECT MASTER CYLINDER) THANKS AGAIN.....DOUG