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Old 05-21-2020, 07:25 PM   #1
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Does rust on belt tensioners affect engine belts

Been looking over the belts on my Cummins 450 engine and notice the tensioner rollers always have rust on them where the belts run after the coach as set for several weeks, or months.
Will this hurt the belts in any way, and if so what should be done?
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Old 05-21-2020, 07:34 PM   #2
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Quote:
Originally Posted by wagonmaster2 View Post
Been looking over the belts on my Cummins 450 engine and notice the tensioner rollers always have rust on them where the belts run after the coach as set for several weeks, or months.
Will this hurt the belts in any way, and if so what should be done?
Itís not a problem. Itís all good.
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Old 05-21-2020, 08:12 PM   #3
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It will all polish off quickly.
Bill
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Old 05-21-2020, 08:16 PM   #4
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Thanks. That's a relief. Didn't know how to keep those shiny surfaces from getting rusty other than oiling and sure didn't think that was an option.
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Old 05-21-2020, 08:28 PM   #5
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If it is just surface rust as a stain, no problem but if the rust is a little thick it will eat up you serpentine belt. I have seen this twice and using a little sand paper to remove the rust will solve the problem.
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Old 05-21-2020, 10:25 PM   #6
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Allen....don't touch it and certainly don't sand it. Once you fire it up, it will wear right off.
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Old 05-21-2020, 10:36 PM   #7
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The bigger concern is the rust you can't see, like the rust on the bearings inside the idler pulley's. Your engine is being exposed to moisture while sitting and the rust forming is just the symptom. Are you parking over dirt/grass? If so lay down a tarp or moisture barrier.
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Old 05-21-2020, 10:41 PM   #8
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Just didn't know which was toughest, rust or the belts. Hoping for the belts.
Six months at a time in storage with just a couple of engine warm ups during all that doesn't keep the tensioners polished off very well. When can't take the coach out for a drive I will put a large piece of cardboard over the radiator vents and let the engine reach operating temps. Not the best solution but figure gives the engine good lubrication.

Always check the engine oil level before starting. Now will have to start taking a good look at the fan box supports too. Forum has such great information. Too bad so much of it has to be at the expense of someone.

Fellow used to tell me you'd work on your coach 2 hrs for every 1 hr of usage. Now think he was very overly optimistic, 2 hrs not near enough.
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Old 05-22-2020, 03:35 PM   #9
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Quote:
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Just didn't know which was toughest, rust or the belts. Hoping for the belts.
Six months at a time in storage with just a couple of engine warm ups during all that doesn't keep the tensioners polished off very well. When can't take the coach out for a drive I will put a large piece of cardboard over the radiator vents and let the engine reach operating temps. Not the best solution but figure gives the engine good lubrication.

Always check the engine oil level before starting. Now will have to start taking a good look at the fan box supports too. Forum has such great information. Too bad so much of it has to be at the expense of someone.

Fellow used to tell me you'd work on your coach 2 hrs for every 1 hr of usage. Now think he was very overly optimistic, 2 hrs not near enough.
The problem is you arn't using it enough.
Bill
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