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Nov 10, 2018 10:26:54 GMT
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Hello chaps,
I was driving to work in my Cherokee to work t'other day, judder, temp gauge goes up, charging goes right down.
Pull it over, no belt.
Got my Brother in Law (he's a good egg) to tow it home, sourced a replacement belt, simple enough job, when I went to start it, it slipped straight off again (the other one disintegrated, rather than a simple slip, the parts I found looked pretty ancient).
Put it back on, it slipped off at, what I assume to be, the same point, which is the lower-right idler pulley.
Checked it out and it wobbles a bit, and it has a couple of small bite marks out of it, is it worth replacing this, and do you all think that this could solve the problem and get my Jeep running again?
Details:
2000 Jeep Cherokee XJ - not strictly retro, but the design is pretty old, so I'm claiming it, plus you guys have some serious know-how 2.5 Turbo Diesel - VM engine 90k miles
Thanks in advance
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Nov 10, 2018 22:59:27 GMT
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hows the belt tensioned? is it an automatic tensioner? any bites out of pulleys or play in the bearings encourages sideways movement of the belt, but the auto tensioner also wear and then don't swing thru a true arc and hence the belt throws off.
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retired with too many projects!
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squonk
Part of things
Posts: 857
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Nov 11, 2018 22:17:13 GMT
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If it comes off straight away I'd be looking at the way you have fitted it and ensuring it is correct. Very easy to make a mistake with a serpentine belt.
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2004 Chevrolet Avalanche Z71 2005 Mercedes CLK320 Cabriolet 1996 Mercedes C180 Elegance Auto Saloon 1996 Rover 620Ti (Dead fuel pump) 1992 Toyota HiLux Surf 1987 Range Rover Vogue (Rusty) 1992 Range Rover Vogue SE (More Rusty) 2006 Chrysler Grand Voyager 2008 Corsa 1.4 Design
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Nov 12, 2018 17:38:16 GMT
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It's an automatic tensioner, yeah, is there any surefire way to tell if the tensioner is bad or good? It swings well and puts up a fair bit of resistance when you're turning it to fit the belt. squonk: Maybe I was a bit overdramatic by saying it slips straight off the belt is on tightly, thankfully there's a diagram on the fan shroud so it's pretty easy to follow, but when you turn the engine over, the belt comes off.
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Nov 14, 2018 23:12:45 GMT
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this shows what you need to check , its the axial alignment , not the tensioning , if its worn on the bearing then pulley will be effectively tight one side and slack the other, a pv or pk belt relies on the friction on the edges of each groove so if twisted due to a tensioner off line it will drive itself off.
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retired with too many projects!
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ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
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If the pulley is wobbly and moves back and forth away from the engine as suggested this certainly will not help your issue.
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Nov 20, 2018 15:41:13 GMT
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Judging by how wobbly it was, I'm thinking it might just be the idler. Unfortunately, while removing it, the bolt sheared off, I tried undoing with WD40 and a pair of pliers, but it's not budging. If anyone has any tips or tricks to use, I'm all ears! Alternatively, if someone wants to give me a quote to come and do it for me, that would be fantastic too! I'm in Coalville near Leicester.
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shin2chin
Part of things
Making curse word cars slightly better
Posts: 820
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Weld a nut on it. The heat should help loosen it and you can then get a socket on it. It's saved me a few times with exhaust manifold studs.
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1977 PORSCHE 2.0na 924 1974 VW Beetle 1600
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I had a Rover 825 VM diesel that had the belt issue. Three times I bought a new belt and three times it killed them. I changed the tensioner etc but it turned out to be the bottom mounting bolt on the alternator had snapped allowing the alternator to twist very slightly and allow the belt to pop off. don't know if the arrangement is the same on the Jeep , alternator on the off side but worth checking.
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Last Edit: Nov 23, 2018 10:07:07 GMT by Spudgun
1984 Rover SD1 Vanden Plas 2600 Auto 1985 Rover SD1 2300s Auto 2005 MG ZT 1.8 Manual
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