Originally Posted by jmw642
1994 dodge 4x4 cummins. for so reason my heat never gets over 145 when its cold out 0 or close to it. Have installed new thermostats 4 times with no results. On this model there is a small hose that bypasses the thermostat would it help to close it off. not sure what its for anybody know?
The bypass hose is for when the engine is cold. It keeps the coolant from going through the radiator when it doesn't need to be cooled. DO NOT
close it off.
Where are you getting the 145 number from? The cluster temp gauge or are you using a temp gun/thermometer?