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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Caliper Rebuild as Maintenance?



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      04-03-2017, 05:47 PM   #1
jwebb335xi
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Caliper Rebuild as Maintenance?

Hey guys,

My 2008 335xi has 96k miles and I'm doing some spring maintenance. Curious whether rebuilding front calipers at this time makes sense or would be a waste of time given age and mileage. For what it's worth, I had brake fluid flushed in December, so I don't plan to do that this spring. Hence, if I do the rebuild, I'd basically be flushing the bakes again with little to no benefit there.

(1) is the rebuild at this time premature and a waste of time/a little cash?

(2) it looks easy, but I haven't done it before, is it as simple as it looks?

thanks for the comments!
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      04-04-2017, 02:24 PM   #2
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It's a PITA. Wouldn't do it until you get to 150-175k as preventative maintenance.
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      04-04-2017, 02:48 PM   #3
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If not tracking the car I see Zero reasons to rebuild the calipers as preventative maintenance, especially at <100k miles.
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      04-04-2017, 04:24 PM   #4
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thanks guys!
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      04-11-2017, 03:15 PM   #5
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If by rebuild you mean seal and dust boot, only if it dried out or leaking.
If you mean the slider bushings, you could change those pretty easily.
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      04-11-2017, 03:37 PM   #6
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Quote:
Originally Posted by davidwarren View Post
If you mean the slider bushings, you could change those pretty easily.
Word. Brass guides are likely a worthwhile upgrade.
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      04-11-2017, 05:19 PM   #7
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Quote:
Originally Posted by FCobra94 View Post
Quote:
Originally Posted by davidwarren View Post
If you mean the slider bushings, you could change those pretty easily.
Word. Brass guides are likely a worthwhile upgrade.
I did this. I used the kit ECS sells. Absolutely, positively worth it. You will fee a noticeable upgrade in pedal feel.
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      04-11-2017, 10:08 PM   #8
jwebb335xi
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Quote:
Originally Posted by mweisdorfer View Post
Quote:
Originally Posted by FCobra94 View Post
Quote:
Originally Posted by davidwarren View Post
If you mean the slider bushings, you could change those pretty easily.
Word. Brass guides are likely a worthwhile upgrade.
I did this. I used the kit ECS sells. Absolutely, positively worth it. You will fee a noticeable upgrade in pedal feel.
Do they need to be re-greased often? That's something that can be done during winter to summer and summer to winter wheel/tire change but more often would likely be ignored.. just being honest
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      04-11-2017, 10:22 PM   #9
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Quote:
Originally Posted by jwebb335xi View Post
Do they need to be re-greased often? That's something that can be done during winter to summer and summer to winter wheel/tire change but more often would likely be ignored.. just being honest
If you read around, most on the E46 platform, etc. run them with no grease at all.

I've only greased them once or twice in ~20k miles. Mine is also 100% street driven. No issues.
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      04-12-2017, 10:04 AM   #10
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If you use a synthetic silicone grease, you should be good. I'd maybe check it every 30k or something like that. If you track the car, a lot more often then every 30k.

Something like this below:

https://www.amazon.com/CRC-05361-Sil.../dp/B01LRDOG30
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