New Brakes for the Beast

"It's a "Porch-uh"" (ikazuchi) 11/19/2013 at 14:41 • Filed to: M5

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Just redid all the brakes on my M5. New pads, rotors, SS lines, and rebuilt calipers. Made the mistake of thinking it would be done in half a day.

The biggest time sink being the rebuilding of calipers. the DIY on the M5 board made it look super easy, but getting the dust boot on is a huge PITA. Managed to tear the first one and couldn't pick up a new one until Monday. My power bleeder came missing the german car adapter, so I had to bleed the brakes the old-fashioned way, which didn't work well so I had to take it to my local shop this morning.

Now I'm getting a pad (or pads) dragging and making a slight noise. Not sure if it's going to go away or if I need to rip everything apart to find the issue.

So much for an "easy" job. I have a list of things left to do on this car, so I hope this one resolves itself quickly and inexpensively.

THOMAS5 > It's a "Porch-uh" 11/19/2013 at 14:43

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My dad has a 2002 e39 M5, it's probable my favorite car (that I have driven)

MonkeePuzzle > It's a "Porch-uh" 11/19/2013 at 14:44

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Clarkson stamp of approval

offroadkarter > It's a "Porch-uh" 11/19/2013 at 14:44

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best M5 ever made, your car looks great in that shade of blue

MonkeePuzzle > It's a "Porch-uh" 11/19/2013 at 14:44

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can't believe the eed nit in your garage is only 5!

shinsen > MonkeePuzzle 11/19/2013 at 14:49

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It's a "Porch-uh" > MonkeePuzzle 11/19/2013 at 14:50

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Haha! Yeah, that's how you get off rotors that are rusted to the hub.

Manuél Ferrari > offroadkarter 11/19/2013 at 14:50

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I 2nd that. Love that color

It's a "Porch-uh" > offroadkarter 11/19/2013 at 14:51

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Thanks! When I decided I wanted an E39 M5, only LeMans Blue would do. Took me 3 months to find that car.

rb1971 ARGQF+CayenneTurbo+E9+328GTS+R90S > It's a "Porch-uh" 11/19/2013 at 14:53

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Great car, great color.

Rev Hang Slows My Roll > It's a "Porch-uh" 11/19/2013 at 14:58

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Do SS lines really give that much of a benefit? i would be concerned about the lack of flex causing increased fluid pressure and wear on other parts.

Built BMW Tough > It's a "Porch-uh" 11/19/2013 at 15:06

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My E39 525i has cemented the M5 as my dream car. Fun fact: the Duralast Gold pads from Autozone work just as well as OEM, and they have a lifetime warranty!

MonkeePuzzle > shinsen 11/19/2013 at 15:06

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I think my favourite part of this hammer joke, and the "I can't stand what a technical bore May is" is that original Top Gear proved that he is very savvy, and its all just part of the character

His Stigness > It's a "Porch-uh" 11/19/2013 at 15:07

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That's my favorite part of the brake job. It's even more fun when it's on a lift because you can get more leverage. I had to beat the living shit out of my front rotors when I replaced my wheel bearings.

MonkeePuzzle > It's a "Porch-uh" 11/19/2013 at 15:07

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there is nothing in this picture that indicates your vehicle would have rust! I'd eat off your rims!

KB Garage > Rev Hang Slows My Roll 11/19/2013 at 15:21

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Stainless lines are flexible.

It's a "Porch-uh" > MonkeePuzzle 11/19/2013 at 15:21

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For some reason the space between the hub and the rotor always get rusty. Every car I've owned does this eventually. I hit the hub with a wire wheel, clean, and apply some high-temp grease on the surface to keep things from sticking again.

MonkeePuzzle > It's a "Porch-uh" 11/19/2013 at 15:23

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was that the correct BMW High-Temp Grease? $169.99 a bottle?

soto > It's a "Porch-uh" 11/19/2013 at 15:24

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"Made the mistake of thinking it would be done in half a day."

It is NEVER an easy job. In my pst "easy jobs" something always goes wrong. something will break, something will get stuck, it never fails. Hmmm, looks like my tires are low, better put some air in them…Tranny falls out.

YostBMW > It's a "Porch-uh" 11/19/2013 at 15:26

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Great car! Are those the ECS rotors, & were you on Friars Rd. this morning?

It's a "Porch-uh" > It's a "Porch-uh" 11/19/2013 at 15:27

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Also realized after I rebuilt the calipers that I should have painted them. They just look so dirty and dull even though I hosed them down in brake cleaner and scrubbed the hell out of them.

It's a "Porch-uh" > YostBMW 11/19/2013 at 15:32

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Yes and no.

I couldn't find any reviews on the ECS rotors, but the price was right. I'll see how they do once I resolve my dragging pad issue.

I live up in Escondido and work in Carmel Mtn, so I don't venture down that way too often. Most of my morning was spent at Escondido German Auto getting a proper bleed done. They were nice enough to squeeze me in first thing.

It's a "Porch-uh" > MonkeePuzzle 11/19/2013 at 15:43

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Yes, it's for the children.

MonkeePuzzle > It's a "Porch-uh" 11/19/2013 at 15:45

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FINALLY! someone has thought of the children!

still waiting for someone to think of the milks

Rev Hang Slows My Roll > KB Garage 11/19/2013 at 15:54

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then what is the point? i thought the benefit was that they dont expand under pressure like rubber does which leads to better pedal feel?

It's a "Porch-uh" > MonkeePuzzle 11/19/2013 at 15:56

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Give it up. Nobody cares about the milks.

MonkeePuzzle > It's a "Porch-uh" 11/19/2013 at 16:01

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wow, GIS for "sad milk"

not sure I want to know what one does in a sad milk bath

It's a "Porch-uh" > Rev Hang Slows My Roll 11/19/2013 at 16:02

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Exactly. They're just rubber lines with a braided stainless jacket that keeps them from expanding under pressure. More of the hydraulic force goes into the brakes and none is lost in the line flex.

KB Garage > Rev Hang Slows My Roll 11/19/2013 at 16:04

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I asked my friend google for a more technical answer than "because race car" and this is what he said:

http://www.centricparts.com/files/technica…

It's a "Porch-uh" > MonkeePuzzle 11/19/2013 at 16:07

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Lots of crying and scrubbing involved.

And the milk needs to be ice cold.

KB Garage > Rev Hang Slows My Roll 11/19/2013 at 16:07

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A lot of my friends run these lines on their track bikes. They're supposed to be better at regulating pressure when paired with a higher performance (or at least hellaciously more expensive) brake fluid. Also, you're correct; they're supposed to be more resistant to expansion.

Rev Hang Slows My Roll > Rev Hang Slows My Roll 11/19/2013 at 16:08

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makes sense, might have to get a set for my GTI

YostBMW > It's a "Porch-uh" 11/19/2013 at 19:16

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I'd like to know how it all works out. I have been looking to use these rotors and pads on my next brake job. I currently use OEM rotors and pads for daily driving, swapping the pads with HAWK HP+ for auto-x.