An old work truck is having some troubles with overheating, so DIY Weekend Mechanic Bruce Bonebrake sets out to diagnose and repair the problem. He discovers a number of problems, including worn out hoses and belts, a broken fan clutch and water pump, and a filthy radiator. All these items need to be replaced, so Bruce and his assistant, Dave, get to work. This show covers problem diagnosis, disassembly of the cooling system and installation of the necessary new parts.