The pump is 1-3/8 OD 1-1/4 ID Al. Are you changing the pump?

Al Gietzen wrote:

Acutally, the inlet to my pump is 1 3/8 i.d.; 1 1/2 o.d..  I don't yet have
the outlet (thermostat housing).  I called the local Mazda dealer parts to
get one and the guy wanted to know if it was stick or automatic, turbo or
non-turbo; and I'm, like "duh?"  He couldn't tell me how they differed.
Anybody know? I'll go for the largest.

In any case, my cooling system design from before I even had an engine was
for 1 1/2 (tube o.d.) engine to "Y"; 1 1/4 to two radiators in parallel.  I
had the rads made with 1 1/4 hose inlet/outlet.  Going for minimal pressure
drop in the piping; and I can't imagine a 260 hp engine with anything
smaller.

Al

So there is a difference in a 20B pump over a 13B Cosmo pump?

Paul Lamar
 
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