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Jimny eats front wheel bearings

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12 Jul 2018 19:24 #194246 by mlines
Young customer has a Jimny that eats front wheel bearings. Both sides last only a few weeks.

Wheels are standard size, no spacers. Visually things look straight. No leaking oil from Swivels.

Bearings when removed are totally wrecked. The one he brought for me to see was exploded, on a previous one the balls were squared off.

He just arrived tonight to buy another bearing having been here 3 weeks ago. Both front wheels are very hot on the hubs, almost too hot to touch when he arrived. One bearing is only 3 weeks old. They have tried adding grease on installation.

Genuine Koyo bearings.

Any ideas where to look ?

Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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12 Jul 2018 19:35 #194247 by Lambert
Brakes binding on and boiling the grease out of the bearings, possibly?

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

Mooo said Ermintrude (black)
Boing said Zebedee (blue automatic)
Hello said Florence (silver gv 2.4)

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12 Jul 2018 19:57 #194248 by mlines
I thought of that one as well but he says brakes on at least one side were rebuilt recently so one side should be ok

Sent from my Pixel 2 XL using Tapatalk

Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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12 Jul 2018 20:04 #194250 by Lambert
They are being pressed in square into suitably clean hubs? Is the car consistently being used hard off road in deep runny mud?

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

Mooo said Ermintrude (black)
Boing said Zebedee (blue automatic)
Hello said Florence (silver gv 2.4)

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12 Jul 2018 20:06 - 12 Jul 2018 20:09 #194251 by Dano0404
Over tighten bearing? Thrust on the bearing? Ware on the shaft or housing?

If both sides are going it’s more than likely a fitting error.
Last edit: 12 Jul 2018 20:09 by Dano0404.

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12 Jul 2018 20:21 #194253 by Jezz
Is he doing them up with a torque wrench to the specified torque, or just a rattle gun?

It's been fettled just a tad.

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12 Jul 2018 20:22 #194254 by Lambert
I was thinking that. Notwithstanding that your time is precious to you Martin, could it be worth fitting them yourself or by a respected fitter to rule out any fitting errors? I know it is not your problem as a supplier of the bearings to fit them correctly but either the car is damaged and won't be able to take new bearings without further repair or whoever is fitting these bearings is doing something quite wrong.

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

Mooo said Ermintrude (black)
Boing said Zebedee (blue automatic)
Hello said Florence (silver gv 2.4)

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12 Jul 2018 20:33 #194255 by Jezz
I would also be asking how is he installing them, Pressed in? or punched in using a drift and hammer? Does he understand which part of the race to put pressure on to push them in, rather than just beating them in with a misaligned drift on the center of the bearing. (sorry if i'm teaching the fellow to suck eggs)

It's been fettled just a tad.

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13 Jul 2018 10:21 - 13 Jul 2018 10:22 #194258 by facade
You can't really apply too much preload without insane amounts of torque, as the preload is set by the split in the inner race closing up, then you'd have to compress the whole of the inner race.

It can only really be down to hammering them in, or pressing on the wrong part which dents the races- brinelling, or overheating them which anneals the bearing- you'd see the colour change and the wear marks. The failed bearings need careful examination.

It could be a manufacturing defect with the bearings, or some fakes may have got into the supply chain I suppose. If the bearings weren't hardened properly they'd wear in no time

Here is a nice article on bearing failure

www.schaeffler.com/remotemedien/media/_s...g_failures_us_en.pdf

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)
Last edit: 13 Jul 2018 10:22 by facade.

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13 Jul 2018 18:51 #194269 by NIKOS OETA
I had the same issue with one side bearing. After a lot of search, it caused by crooked hub, also the abs light came on after 110kmh. After changing the hub both problems solved.

Jimny 1.3VVT/ 5" Zanfi Custom Suspension / 2" Body Lift / 31" Maxxis Trepadors+31" BF KO2/15X8 -40 wheels / -27% Transfer / Smittybilt 10.000 X2O Gen2 Comp Whinch / Custom Trasfer Skid and mounts / Veanted Discs + Vitara Calipers/ Led H4 Headligts / 120w Led Bar + Led Work+fog Lights / Yaesu 8800

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15 Jul 2018 12:38 #194295 by mickt
What is the history of the car with this owner? has he just got it or ran it for a fair amount of time before he replaced them and if so why did he replace them then?

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