... cummins engine parts 1,Winter use 2,Reduce vehicle exhaust pollution 3,Preheat antifreeze 4,Reduce vehicle wear and tear cummins parts. ... tank-type heaters), the Simate engine preheater is a pump-type preheater, it has an internal circulation pump. Therefore the preheater ... force the coolant to circulate through the preheater and the engine, the preaheater heats the coolant continuously, and the ...