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#11
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E39 530dA -02 M-Sport Messing metallic E53 X5 3.0dA -06 Sport Stratus grey |
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#12
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Thank you. It looks like there're no external leaks. The brake fluid has been at max level consistently.
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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M. |
#13
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try applying pressure SLOWLY with the engine off and no vacuum, if pedal drops with lite pressure but gets hard when you push hard then master cylinder is leaking by internally.
It's funny that the ECS info contradicts itself! That being said it's not all that uncommon to need both since the booster travels and diaphragm stretches more when the master cylinder fails so it can take the maybe 'soon to go' booster with it.
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1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
#14
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Quote:
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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M. Last edited by X5only; 09-01-2024 at 11:13 PM. |
#15
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For bleeding the pressure bleeder is really nice. I use the wheel pins to hang the bottle from, once the wheels are off can probably do all 4 corners in less than 10 min. I'd be dreading reaching up and working on the pedal area much more. My metal brake pipes have a fair bit of corrosion, I worry about them and need to replace them. If I had what you have I would be really checking them, under the plastic covers etc as I know they are suspect. If yours are for sure ok I agree it is probably master cylinder.
https://www.amazon.com/Motive-Produc.../dp/B0002KM5L0
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'05 E53 3.0 6mt. Sterling gray metallic / black. 135k daily driver '96 E36 328is 5mt. Alpine white / gray. 160k restoration project '17 F30 340ix 6mt. Black sapphire metallic / black. 80k missing engine Last edited by Factory6speed; 09-01-2024 at 11:56 PM. |
#16
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Quote:
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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M. Last edited by X5only; 09-02-2024 at 12:40 AM. |
#17
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Quote:
I renewed front & rear brakes (drums, rotors, shoes, pads, hardware) and she drove it for a couple weeks before she complained about the pedal sinking. At that point, I asked a friend to come help me, as I can't crawl under the car anymore ( too low, unlike the X5 and my pickup trucks). We used a vacuum bleeder on all four brakes, and determined that I should replace the master cylinder ( my wife has a history of stomping on the pedal and blows out master cylinders). So, I replaced it, and bought the pressure bleeder, for the next round. He was under the car again, I was upside, and using the Motive Power unit and my Foxwell to bleed both the brakes and later the ABS, over an 8 hour day (several unsuccessful tries). Never got a great pedal feel, but if you double-tapped it, it worked fine. But it wasn't good enough for the wife . She let it sit for a year after all the work I'd done (3 years total), and we sold it to a friend's kid. He got drunk and wrecked it two weeks later. My wife bought a low-mileage Lexus, as a replacement, so she's happy, but still have bad dreams about the 2 years of working on her Cobalt, and watching it rot for a year afterwards. I sure hope I have better luck on my next brake job. Her '98 GMC is next. Sent from my SM-G965U using Tapatalk
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01 BMW X5 E53,3.0i-5L40E, 7/13/01 topas-blau,Leder-grau,"resto-project car" Here: 14 Lexus ES350,3.5L-U660E 09 HHR Panel,2.2L-4T45E 04 Chevy 2500HD,6.0L-4L80E 98 GMC Sierra 1500,5.7L-4L60E Gone: 66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake 08 Cobalt Coupe,2.2L-4T45E 69 & 75 C10s,350c.i.-TH350 86 S10,2.8L-700R4 73 Volvo 142,2.0L-MT4 72 & 73 VW SuperBeetles,1.6l-MT4 64 VW,1.2l-MT4 67 Dodge Monaco 500 2dr ht.,383c.i.-A727 56 Chevy 210 4dr,265c.i.-PGlide |
#18
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Wow, I hear you. I prefer deterministic DIY projects. Brake bleeding feels like an art, a complicated one. I always take brake bleeding to a shop that do it every day and are likely to do it successfully in a few hours.
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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M. |
#19
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BMW Part Number 11667635657 (11-66-7-635-657)
4.4 and 4.8 only Sent from Embassy network using Tapatalk
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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course |
#20
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I sure hope it is the vacuum pump that has failed because it’s very easy to replace or repair. I’ve done it a couple of times in the past. Is there a way ro tell if it’s the culprit?
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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M. |
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