AMC Coupes/Sedans/Wagons 1975-1988 Repair Information

Belts

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INSPECTION



Inspect the belts for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately. It is best to replace all drive belts at one time, as a preventive maintenance measure, during this service operation.

ADJUSTING



Belts are normally adjusted by loosening the bolts of the accessory being driven and moving that accessory on its pivot points until the proper tension is applied to the belt. The accessory is held in this position while the bolts are tightened. To determine proper belt tension, you can purchase a belt tension gauge or simply use the deflection method. To determine deflection, press inward on the belt at the midpoint of its longest straight run. The belt should deflect (move inward) 3 / 8 to 1 / 2 in. (9.525-12.7mm). Some long V-belts and most serpentine belts have idler pulleys which are used for adjusting purposes. Just loosen the idler pulley and move it to take up tension on the belt.

REMOVAL & INSTALLATION



See Figures 1 through 6

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Fig. Fig. 1: To adjust or replace a belt, loosen the mounting and adjusting bolts slightly



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Fig. Fig. 2: Take the tension off the belt by pushing the component towards the engine, then remove the belt



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Fig. Fig. 3: Slip a new belt over the pulley.



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Fig. Fig. 4: Pull or pry outwards on the component to tension the belt, then tighten the mounting bolts



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Fig. Fig. 5: Use a ruler and a straight edge to measure belt deflection



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Fig. Fig. 6: On most serpentine belts and some long V-belts an idler pulley is used for belt tension adjustment

To remove a drive belt, simply loosen the accessory being driven and move it on its pivot point to free the belt. Then, remove the belt. If an idler pulley is used, it is often necessary, only, to loosen the idler pulley to provide enough slack the remove the belt.

It is important to note, however, that on engines with many driven accessories, several or all of the belts may have to be removed to get at the one to be replaced.

See Figures 7, 8, 9 and 10

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Fig. Fig. 7: The cracks developing along this hose are a result of age-related hardening



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Fig. Fig. 8: A hose clamp that is too tight can cause older hoses to separate and tear on either side of the clamp



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Fig. Fig. 9: A soft spongy hose (identifiable by the swollen section) will eventually burst and should be replaced



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Fig. Fig. 10: Hoses are likely to deteriorate from the inside if the cooling system is not periodically flushed

 
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