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2011 jeep patriot sport 2.4 liter w/ac.

today I replaced the upper and lower idlers, tensioner, alternator and serpentine belt.

everything is back together but the belt keeps slipping when I start it. what could I be missing..


thanks in advance have a great day
 

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Did you use a pry bar to pry the alternator to tighten the belt?
Yes, a good point--the serpentine belt requires higher tension than the old v-belts ever did. Unless an idler wasn't properly tightened, allowing some angular belt routing, I don't know what else could be involved. Good luck!
 

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Belt tension is maintained by the spring loaded tensioner and is NOT set with alternator adjustment.

- maybe you got a defective aftermarket tensioner?? It happens.
- incorrect length belt? Sometimes an aftermarket part is wrong.
- oil or coolant on belt?
- bad bearing and/or decoupler pulley, causing resistance to spin?
- other excessively worn or misaligned pulleys?

Man, I cannot think of anything else. These Gates videos are pretty good: There should be little to no oscillation of the tensioner. Also check out the water spray on belt test.

Good luck!
 

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2011 jeep patriot sport 2.4 liter w/ac.

today I replaced the upper and lower idlers, tensioner, alternator and serpentine belt.

everything is back together but the belt keeps slipping when I start it. what could I be missing..


thanks in advance have a great day
Did you ever find a solution? Having same issue!!!
 

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I've seen this a fair few times... Replaced the idlers tensioner and belt... Still squealing... Try spraying a small amount of silicone spray on the flat side of the CAM belt when its running. 👍
 
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