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Belt Squeal

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03 Nov 2022 00:41 #245720 by redoregan
Replied by redoregan on topic Belt Squeal
Right, I see. Well, I'll have a look, myself but if you think of it, do let us know. Thanks again.

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03 Nov 2022 22:02 - 03 Nov 2022 22:43 #245752 by Stainless
Replied by Stainless on topic Belt Squeal
I have found some of my old belt replacement notes. Belt Lengths:
Alternator: 835 or 840 mm. original belt: 4PK841.
Power Steering and Air Conditioning: 955 or 960 mm. original belt: 4PK954.
Power Steering but no AC: 850 mm.
Air conditioning but no PS: 4PK785 mm.
These original belts are 4-ribs wrapped belts, not Raw Edge.
Dunlop make the Raw Edge belts we are discussing.
Belt Stockists: ZORO.CO.UK
bearingboys.co.uk
eastengineering.co.uk
acorn-ind.co.uk

Please check these belt lengths are correct, as my old figures could be wrong. With Raw Edge (Cogged) belts, it’s important that the exposed raw-edge rides on the upper part of the pulley vees, and not running on the ribs at the bottom of the various pulleys. This pulley ride height is dependent on the belt width. For instance, 1PK Rib = 3.56mm, so 4PK = 14.24mm wide belt.
Last edit: 03 Nov 2022 22:43 by Stainless. Reason: Forgot detail.
The following user(s) said Thank You: redoregan

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02 Dec 2022 12:09 #246198 by Abudougal
Replied by Abudougal on topic Belt Squeal
OK dredging up this old thread to save starting a new one and splitting up any useful info that might come out.

Had a bit of a squealy belt a while back and tightened it, no probs, then I went lamping and when I left in the dark after using a powerful spottie (and probably draining the battery a bit)  the belt squealed like mad and popped a few miles later.

Fixed it and no probs, now if Im starting the car in the dark and turn lights on it occasionally squeals a bit, I need to turn it off and on again or dip the clutch or switch off the lights for a sec just to get it gripping again, nowhere near as bad as the time it broke.

Obviously I have a small problem here but small problems get worse, I'm guessing either the battery is weak or the alternator, any opinions on which one? I've tried to be as accurate as I can with the symptoms.

My multimeter is at work, keep forgetting to bring it back to check it but seem to remember it charged ok at idle with lights off, I should switch them on and see if it's ok. Also if it's the battery I expect this cold weather will finish it off and that should be a decent diagnosis.




 

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02 Dec 2022 13:20 #246200 by DrRobin
Replied by DrRobin on topic Belt Squeal
I am pretty sure my belt is the right tension, but on a couple of cold mornings this week I got a bit belt squeal at start up and at just setting off.

However, my battery is a bit discharged and that was with headlamps on, the blower on and probably demist as well, so it was probably putting too much load on the alternator. As soon as the revs got up, it went and doesn't come back even at idle after a few miles.

I will probably give the battery a charge this weekend.

Robin

2011 Blue Jimny SZ3, Hankook Dynapro/Maxxis Worm-Drive, BB Classics BB6 Sports Seats, Radius Arm protectors, Android Head, DAB, 360 Camera, TPMS, K&N, Bosch Aerotwin, boot light, parcel shelf, boot box, dash box, Osram Nightbreakers, CTEK Battery Sense, Front & Rear Recovery points, CB Radio.

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02 Dec 2022 16:35 #246203 by Abudougal
Replied by Abudougal on topic Belt Squeal
Perhaps I'm worrying too much, have bought a six quid voltmeter from ebay to wire in and then I can keep an eye on what's going on when it acts up.

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02 Dec 2022 17:09 #246204 by DrRobin
Replied by DrRobin on topic Belt Squeal
Yes a cheap voltmeter will do the job, unless it turns out to be a 'sick squid'...
 

Robin

2011 Blue Jimny SZ3, Hankook Dynapro/Maxxis Worm-Drive, BB Classics BB6 Sports Seats, Radius Arm protectors, Android Head, DAB, 360 Camera, TPMS, K&N, Bosch Aerotwin, boot light, parcel shelf, boot box, dash box, Osram Nightbreakers, CTEK Battery Sense, Front & Rear Recovery points, CB Radio.
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