o ring with belt tensioner? - Ford Powerstroke Diesel Forum
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Old 12-10-2010, 10:45 PM
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o ring with belt tensioner?

Just got a new serp belt tensioner from a Ford dealer and it has an o ring included. Is there any more to replacing this thing than unbolting the old one and bolting on the new one? I would guess the o ring goes on the bolt? I'm replacing the idler too, but that's clearly an unbolt, bolt up job
Thanks for any input.
Scott
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Old 12-11-2010, 09:50 AM
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Nobody has any input on this? I have looked in my manual, and searched online... no luck. I could just rip into it, but I'd like to know in advance what's expected, that's the beauty of these type of forums


Thanks -
Scott P
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Old 12-11-2010, 02:02 PM
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I'll post this for if someone needs it in the future. It's a 13 mm bolt for each of them, and you just loosen the bolts, take the idler/tensioner off, and replace them. They were not super tight when I took them off, but I did tighten them pretty well when I put them back on. There is a small o ring on the bolt that holds the tensioner on, but it does not seem to hold back any fluid at all, the bolt came out dry. I replaced the idler (which seemed ok, not loose), tensioner (the ribbed pulley was loose) and the belt, which was in good shape but I might as well while I have it off. Started the truck and SILENCE! No belt noise at all. I would guess the pulley on the tensioner would have let go in 25,000 miles or less.

I would replace as PM if you haven't already considered this. My truck has 136,000 miles on it.

Scott
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Old 12-12-2010, 12:34 AM
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Scott, thanks for the write-up.
About to do this real soon.

What is the part # of the tensioner and belt that you used?
I understand that there are 2 different belts available.

TIA.
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Old 12-12-2010, 02:19 PM
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BOught the stuff from Gaudin ford in NV and had it shipped to my house. It was 36.44 for the belt - 1C2Z8620 NA
idler pulley - F8TZ 8678 FA (28.48)
tensioner assy - F8UZ 6B209 CA (80.81! cheap)
was well worth it even paying shipping.
And of course not having to listen to that chirp in the morning and not worrying about the pulley coming apart made it REALLY worth it.

Scott
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Old 12-12-2010, 06:29 PM
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Scott,

Sounds good! (pun intended!).
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