My mechanic said the exact same thing to not use the thermostat valve. He said that since mehran engine is small, it gets heated easily and the pressure from the valve would cause the radiator to leak...
I ain't buying that crap. But I think, during the summers, it would be okay to run the car without the valve as the function of the valve is to get the car to its operational temperature quicker. During summers, I don't think the engine is going to need that much tome to heat up. @ekdrifter correct me if i am wrong?
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