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Squealing at 40mph+

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22 Mar 2018 21:42 #190760 by petejones69
Hi

My Jimny starts squealing when I get to around 40mph. It's not constant, but it's very noticeable when it starts!

Any ideas?

Cheers
Pete

1999 Jimny with 3" lift, Rockwatt transfer box, under-body protection, Cooper STTs and folding cup holders...

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22 Mar 2018 21:50 #190762 by Jimx5
Replied by Jimx5 on topic Squealing at 40mph+
Worn/loose alternator belt.
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22 Mar 2018 22:23 #190763 by petejones69
Replied by petejones69 on topic Squealing at 40mph+
OK, cheers Jim

1999 Jimny with 3" lift, Rockwatt transfer box, under-body protection, Cooper STTs and folding cup holders...

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23 Mar 2018 06:22 #190770 by Max Headroom
Replied by Max Headroom on topic Squealing at 40mph+
Pete does it get worse if you start loading the alternator i.e. heater fan on maximum, lights, wipers going, radio etc?

Only my neighbours Jimny had this problem; it started alright and ran alright, but she noticed the alternator belt started shrieking.
I looked at it for her but couldn't find much wrong.
She eventually took it to a local garage to get the belts changed. They thought they had fixed the problem it but the fault didn't go away, and it was only one cold morning when she had the heater fan and wipers on that we noticed it got worse; turn them all off and it quietened down.

The fix was to change the alternator :huh:


IF IT AINT BROKE, KEEP FIXING IT UNTIL IT IS

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23 Mar 2018 06:58 #190776 by Lambert
Replied by Lambert on topic Squealing at 40mph+
When you have the belts off to replace them just check the crank pulley is firm. It's a silly two part bonded thing and the bond can fail making it squeal.

It's not a Jimny. It's my Jimny

Mooo said Ermintrude (black)
Boing said Zebedee (blue)

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23 Mar 2018 08:52 #190781 by petejones69
Replied by petejones69 on topic Squealing at 40mph+
I will check next time I'm out.

1999 Jimny with 3" lift, Rockwatt transfer box, under-body protection, Cooper STTs and folding cup holders...

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28 Mar 2018 20:28 #190997 by petejones69
Replied by petejones69 on topic Squealing at 40mph+
Took it for a spin this evening. Did find that after a cold start the squealing begins when I get to around 40mph, but once warm, it doesn't begin until around 50mph. The electrics made no difference - turned the lights on and the fan up to full.

However, I do need to replace the front wheel bearings. Could this be making the squealing? It's definitely coming from the front end.

1999 Jimny with 3" lift, Rockwatt transfer box, under-body protection, Cooper STTs and folding cup holders...

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11 Jun 2018 20:03 #193381 by petejones69
Replied by petejones69 on topic Squealing at 40mph+
The bugger is still squealing after I had two belts changed when it went in for an MOT. So I guess it's a misalignment. Is this easy to fix?

1999 Jimny with 3" lift, Rockwatt transfer box, under-body protection, Cooper STTs and folding cup holders...

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16 Jun 2018 08:39 #193520 by kirkynut
Replied by kirkynut on topic Squealing at 40mph+
Check the crank pulley as they have a rubber damper that deforms. It's the only pulley that can come misaligned because the rest are solid.

Kirkynut

The underdog often starts the fight, and occasionally the upper dog deserves to win - Edgar Watson Howe.

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