Search (23 Feb 2018)
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About a month ago my fan belt snapped after several weeks of it squealing. I've recently replaced it but it still squeals. I had a mechanic check that it is tight enough and he seems to think that it is.
It seems to squeal mainly while the engine is cold, and particularly at night when the headlights are on. It squeals for a long time and sometimes the only way to stop it is to turn the headlights off and on again, although sometimes this doesn't work.
While it was squealing this morning I lowered the window and noticed that it was very slow to open.
Could there be a problem with the alternator that would case the belt to squeal?
It could be that the battery is on its way out and the alternator is doing overtime to keep up or some twin cams have crank shaft pulley failure issues that make the belt squeal a bit.
It could be an issue with the alternator.
A bit more investigation is required I think.
The underdog often starts the fight, and occasionally the upper dog deserves to win - Edgar Watson Howe.
My Jimny Thread Here: www.bigjimny.com/index.php/forum?view=topic&catid=8&
2013gary wrote: Just had a closer look and I noticed black residue on the front of the alternator (see pic). Could it be that the alternator pulley is seizing and damaging the belt?
Sure looks like it. the bearings in the alternator could be broken.
You can try to onhook or loosen the belt and spin the alternator pulley with your fingers. should be easy to turn around with little or no resistance.
I doubt that any electric resistance from charging can do that.
2005 Jimny M16A VVT, 235 BFG MT, 2" Trailmaster, 17%/87% high/low gears.
I've had my Jimny over 3 years now and it has always squealed a little bit - particularly when it's been very wet, which I assumed was normal. It was only when I had to start turning headlights on and off to stop the squeal that I thought it might be a bit more of a serious problem!
The belt was replaced about 2 months ago by a garage and they seem tight enough to me. Would you suggest it’s the battery that needs replacing ?