In this episode,
Weekend Mechanic Bruce Bonebrake replaces the timing belt on a work truck. This involves draining the coolant and removing a number of engine parts -- including the fan assembly, crankshaft-pulley assembly, harmonic balancer and timing cover. The water pump and thermostat housing are also removed and the mating surfaces are cleaned. The thermostat and water pump are both replaced, and related gaskets are replaced. Once the belt is replaced, the process is reversed to reassemble and install all parts. The finishing step is the addition of new coolant.
