Dylan,
You've covered your bases well. That's the list that I would have run down for you to try.
It sounds like belt slippage so I would look at the idler pivots a little more closely. If you have debris in the bushing you can simply grease the zerk and the debris is pushed out and everything works fine again. Other times (especially if water is the culprit) you'll need to remove the idler arm and clean all the surfaces (bushings) with some emery cloth, re-grease and reinstall to fix the problem.
Replacing the spring would be my next recommendation. Make sure that you use a factory spring. An aftermarket or one that looks close may not apply enough pressure allowing the belt to continue to slip or may apply too much adding wear to all of the rotating assemblies.
Please let me know if you have any further questions.
Thanks
Terry
You've covered your bases well. That's the list that I would have run down for you to try.
It sounds like belt slippage so I would look at the idler pivots a little more closely. If you have debris in the bushing you can simply grease the zerk and the debris is pushed out and everything works fine again. Other times (especially if water is the culprit) you'll need to remove the idler arm and clean all the surfaces (bushings) with some emery cloth, re-grease and reinstall to fix the problem.
Replacing the spring would be my next recommendation. Make sure that you use a factory spring. An aftermarket or one that looks close may not apply enough pressure allowing the belt to continue to slip or may apply too much adding wear to all of the rotating assemblies.
Please let me know if you have any further questions.
Thanks
Terry