The 1986 Oldsmobile Cutlass comes in a few different models. One has a 330 cubic inch engine, and the 86 Cutlass with the sports package has a 400 cubic inch engine. Replacing the drive belt on both of these models is going to be just about the same. You won't need to adjust the tension pulley because it is preset to the specifications for that engine. If you need to adjust the belt after you have replaced it, the specifications will be in the service manual for your specific model.
Tools Used: Locking pliers
Change Belts
Park the Cutlass on even ground and open the hood to allow the engine to cool. Compress the metal clamp on the hose leading from the engine to the radiator, using the pliers. Pull the hose from the radiator.
Lock the pliers onto the nut in the center of the tension pulley. Turn the nut to the left until the belt loosens. Pull the belt off the engine pulley and out of the engine compartment.
Place the inside of the new belt onto the lower left engine pulley. Lead it across to the right and around that pulley. Lead it up to the next pulley and then up to the tension pulley. Turn the nut in the center of the tension pulley to the left and place the belt onto the roller on the tension pulley.
Release the nut on the tension pulley. Replace the hose to the radiator opposite the way you removed it. Remove the pliers and close the hood.
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