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Front Caliper Slide Bush

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04 Aug 2026 19:20 - 04 Aug 2026 19:23 #265043 by Soeley
I changed my front pads today. I noticed one slide bush on each side was blue, see picture below.
The other was shiny silver like I'd expect. Any reason for this?
All the old pads still had 3mm left down to the wear groove. All worn evenly to the eye,  about 0.5mm out to the verniers. None of the sliders felt to be sticking.

 
 

Black 2019 Jimny SZ5

Soeleys Jimny

Last edit: 04 Aug 2026 19:23 by Soeley.

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04 Aug 2026 23:22 #265044 by LM42
Replied by LM42 on topic Front Caliper Slide Bush
Only ever seen them rusty! Getting some brass ones , made!

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06 Aug 2026 04:23 - 06 Aug 2026 05:22 #265051 by yakuza
Replied by yakuza on topic Front Caliper Slide Bush
I bought a set of new sliders off some web shop a few years back but after I started using silicone grease instead of the old copper grease I havent needed them. Yet.

Could the blue be some sort of teflon or something to improve corrosion resistance and sliding abilty?

Norway -84 SJ410, 87 SJ413 lwb, 88 sammy trailer.
2005 Jimny M16A VVT, 235 Cooper Disco, 2" Trailmaster, ARB rear lck.
Last edit: 06 Aug 2026 05:22 by yakuza. Reason: typo

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06 Aug 2026 07:57 #265052 by Soeley
Replied by Soeley on topic Front Caliper Slide Bush
I bought some proper brake grease this time. I've always used copper grease in the past. Been told the proper stuff is much better water resistant and won't wash off.
If all the bushes had been blue, I wouldn't have given it a thought. But just one on each side made me wonder if it was done on purpose?
It didn't wash off with brake cleaner. To me it looked like the kind of blue you get with heat treatment.

It doesn't concern me, just curious.

Black 2019 Jimny SZ5

Soeleys Jimny

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06 Aug 2026 12:41 #265053 by mlines
Replied by mlines on topic Front Caliper Slide Bush
Make sure the grease you use is not oil or petroleum based.. It must be a "rubber" safe grease - typically "red rubber grease".

If you use an oil based grease such as copper grease, the rubber boots will swell and jam the slider.

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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