It's summer now and I had an issue earlier about loosing lots of coolant which is now fixed. During the winter, the truck wont heat up properly. It may be only 20 degrees outside then, but it won't get to temp. I was wondering what to do about it. My idea was to just block off some of the radiator with some sheet of metal secured to the front of the rad to prevent airflow. Any better ideas?

 

Well i have not had my truck during a winter yet, but i know our 94 jeep cherokee sport with the 4.0l does the exact same thing, never warms up in the winter and it runs pretty warm in the summer. I've used a piece of cardboard infront of the radiator and it helps a little.

 

fan clutch not thermally disengaging? causing to much cold airflow through radiator? how was the cab heat? possible improper antifreeze mixture/ratio? what temp t-stat are you running? are you sure it's even in there? if it is and doing it's job, does it have the little bypass rattler deal? possible that with a vibrant cooling system the bypass could be moving enough coolant to not let the engine build any heat especially with the heater core getting high fan. does the the radiator have the transmission cooler built in or are you only running an aux. cooler. I think if it was in the radiator it would also help build heat even if in conjunction with an aux. cooler.