My serpentine belt keeps coming off on my 454 Dually. The a/c is not working so the compressor is suspect. It started when I got the harmonic balancer was replaced. Everything has been replaced like tensioners, even brackets. What can be wrong?
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The a/c is not working so I thought the compressor could jam and throw the belt.Well, if it started doing this when the harmonic balancer was replaced, why would you think it's the AC?
You can check alignment with a long straightedge. From the crank pulley, check against the various pulleys like alternator, PS, AC, etc.
Verify alignment of the belt. This is not easy, and it's more complex than most folks think. Your straightedge needs to prove alignment from the crankshaft pulley to the other pulleys, and ALSO FROM THE OTHER PULLEYS BACK TO THE CRANKSHAFT PULLEY. You MUST verify alignment both ways, because a pulley can seem to be aligned when in fact it's out of alignment in two different planes. It's a 3-D world, pulleys can be out of alignment by being angled top/bottom, left/right, or by being straight but too far forward/rearward, or any combination of errors. Verifying TWO pulleys--crank and A/C, for example--requires at least three tests of alignment.You can check alignment with a long straightedge. From the crank pulley, check against the various pulleys like alternator, PS, AC, etc.
Good question.Well, if it started doing this when the harmonic balancer was replaced, why would you think it's the AC?