"Quirk, Kevin KA" wrote:

Paul,

On the subject of thermostats, I just bought a 13B-REW from a Jap Cosmo and

found that it has two thermostats (side by side in the normal position).  The
motor is similar to that in the RX7 but I am not sure if they have the same
setup as I think the water pumps are different designs.  Does anyone know why
two thermostats are used ?

Kevin Q

The 1994 Mazda shop manual on the RX7 only shows one. I don't have the
shop manual on the 13B Cosmo.

charles.harbert wrote:

The 20B's have this dual thermostats setup. I suspect it is for rapid warm up
for emissions. Anyway, I removed it and use the earlier model front case (with
motor mounting holes) with a single thermostat (160 degF).

 
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