How do you replace thermostat on 1977 Chevy truck?

Answer 1

Pretty easy job actually. Drain the coolent. Open the hood and look for the large radiator hose that goes from the top of the radiator to somewhere on the middle of the front of the engine's top. The hose attaches to a part called the "goose neck" which is held in place on the intake manifold by two bolts. Remove the two bolts (often you do not have to disconnect the radiator hose first but you may have to) and you will find the thermostat under it. Remove and replace the old one, put on a fresh gasket (make sure the surface is clean first) using a sealer if you prefer and then bolt the gooseneck back down. Usually the bolts are 3/8" and require about 20 foot pounds of torque. Replace the collent. Its about a 30 minute job and generally you'll need a screwdriver and set of socket wrenches. Hope this helps.