Posted by Steve@Advance on September 29, 2020 at 08:03:21 from (24.182.105.128):
In Reply to: alternator update posted by Ellis Kinney on September 29, 2020 at 07:38:23:
If the belt has ever been run loose, or if it's too narrow for the alternator OR the crank pulley, it will run against the bottom and not grip the sides as it should.
A common problem, the old engines originally came with a wide belt. Modern alternators have a narrow pulley. You can buy a wide pulley for the alternator, which will let you run a belt that better fits the crank and water pump.
If either pulley is shiny in the bottom, it's running too low.
A good way to check the belt grip, push against the alternator fan with your thumb. It should be near impossible to slip or might even turn the engine without slipping.
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