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Discussion Starter · #1 ·
I have an 89 F-250 with a 351. In the last 2 years I have replaced the Belt tensioner 4 times. The first one started squeeling and exploded after about a month. Iv tried using light viscocity lube, WD40, even soaking them in oil to make the squeel stop, but it wont work. I keep replacing them because I dont wont a repeat of the first. Is there something I'm missing that could be the cause of this? I do a moderate amount of 4 wheeling so I do spray then engine down sometimes to get mud off but its never on the front of the engine, could the water be doing this?
 

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You might be getting mud/grit into the bearings when you are out having fun.

It'd be a lot worse if it was your alternator.

OIC you're from Middletown, NJ. I guess you play at 1/4 mile?
That sandy gritty soil will reak havock on any moving parts.
 

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Discussion Starter · #3 ·
Not sure where that is but I'm a fan of the Leonardo mud flats and a sand pit in Tinton Falls by the back entrance to NWS Earle.
Is there anything I can do to help keep this thing working, or maybe a better built one?
 

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Are you sure the belt is the correct length? Is the belt wearing out as well? Is the tensioner bearing (pulley) making the noise or the tensioner spring?
 

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Discussion Starter · #5 ·
Is the pully itself. The belt is stock for the truck, I relaced it after the first one because it was shredded. I replaced it once again after that when I did a tune up on the truck, I only bought it because I forgot I had just changed it. That was about 7 months ago.
 

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In the last 2 years I have replaced the Belt tensioner 4 times.
I would try cleaning it well after each sand trip, and then lubing it. Initially with WD-40, and then a week later with PBblaster. WD-40 has superior water displacement abilities, that is what the WD stands for. It is my understanding that PBblaster continues to lubricate after it evaporates longer than some other products.

Overall, I think you are going to have to mark up replacing the pully as a part of the cost of having FUN!
 
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