Quote Originally Posted by Mark Rinker
Interesting. Is there a safegaurd to keep the two from being installed reversed?

My '01 pressurizes the cooling system, but only in cold weather (bypass mode?). Wondering what the effect of removing one or both thermostats would be and continuing to run this high mile engine for another 50K or so, and repowering in the fall before cold weather sets in, creating the coolant loss issue described in other threads.

Would you pull one, or both?
In theory, if you pull one or both, then the lower rad hose would be subject to suction collapse at high rpm.

The front stat cannot be installed in the rear, but I do believe the rear will fit the front housing. If that were to occur (wrong stat in the front) then the bypass would never be closed off, radiator flow would be reduced, and overheat would be the result on a workload session.

But I can't see how running without a stat can be less stressful to a high mileage vehicle.