'69 ZL-1 engines questions

[nuch_ss396]

Mark,

Can you tell me more about the aluminum water pumps that
were used? Were they used on Camaro's? Were they the
long nose version? If so, got a part number for that WP?
Seems like every ZL-1 I've seen used the painted cast iron
version. What else can you tel me?

Steve

[ZL1.FUN]

short aluminum water pump on the ZL1's casting number 3975928, and I also believe they use these still, on the 572 crate motor’s, but there is just as much indication that the cast iron 3931065 was used. Both would have been painted black

[396L35]

I just remember seeing a picture of a ZL1 with the short aluminum water pump... Maybe they used the cast as well but I'm no expert... I'll try to get that picture posted as soon as I get home from work...

[396L35]

The first two camaro ZL1's came with the aluminum water pump that were natural aluminum finish casting #3968811. This pump looked exactly like the cast iron pump but it was aluminum... They only used it on the first two or so cars before they noticed that the bearing was moving in the housing so they went to the cast iron pump.. It explains it on page 176 in The 1969 Camaro Reference Book From A to Z by John Hooper.. It also says they used the short aluminum pump like the corvette pump as well... Here is a part # list on the ZL1 cars... http://www.copo.com/ZL1-Parts-Listing.htm Hope this helps...