I have been told by a budding engineer type that using the Mazda RX7 Oil Cooler with internal thermostat will require removal of the thermostat.
My question is WHY?
The thermostat bypasses the cooler until operating temp is reached, so what is the difference between the internal one and an external one?
Oh, cooler will be installed on the scavenge line of a /6 as if it makes any difference.