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What causes a 1991 Chevy Lumina 3.1 engine serpentine belt to keep snapping after just replacing the old one with a new one?


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Wiki User
2004-09-27 18:04:48
2004-09-27 18:04:48

Check for a bound up alternator, coolant pump or other pulleys. Also make sure to check the power steering pulley for broken edges, they are plastic and with age tend to break

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The auxiliary drive or serpentine belt (not timing belt)being lose or snapping

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Check the allignment of all the pully's.

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try replacing the vacuum hose from the brake master cylinder to the intake manifold its a 1/2 in hose

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Could be a couple causes for this: * the tensioner may need replacing - not keeping enough tension on the "S" belt * worn (stretched) serp belt - replace ~ every 50 or 60k miles.

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the thermostat will make both fans become idle if it is not opening. this happened to me on my 95 3.1 lumina


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