GM net] Figured out how to count water pump impeller

Fred Hudspeth

Member
Sep 4, 2006
256
5
18
Bob,

Is your engine running hot? Or is its temperature well controlled at all
ambient temperatures?

I've run 'most every WP configuration at one time or another, including
running them backward with a serpentine belt with both modified and
unmodified housings. The last one I ran on the 455 was an emergency
replacement from AutoZone, caused by on-the-road failure of a reverse-flow
prototype from Leigh Harrison. I never noticed any difference in cooling
with ANY of them, even while monitoring with the digital readouts on the EFI
computer.

There have always been other things I could worry about more effectively, I
guess.

Ken H.