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Brake Fluid Blowout
Being a firm believer that there are no stupid questions, only stupid people asking questions, I have another for you...
The brake fluid reservoir has two compartments, the rear one, the secondary, is empty and I have brake fluid that has leaked from it down the front of the booster (complete with paint peeling off the thing). Any chance I can get by with replacing the o-ring that goes between these two units? Or am I looking at a new master cylinder? I know I can possibly tell by taking it apart but I'd like to go ahead and fix it once it's apart and there are parts to buy first. It doesn't look like Fastlane has the o-ring (shoot) but Performance seems to have it. They also have something called a Power Bleeder. This promises one-man operation and, since I can't get anyone to help me with mundane tasks like pumping the brake peddle 10 times for each wheel, I am tempted to but this thing. Anyone use one? Thanks, Mark
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1983 300D 308,000 mi (Daily driver). |
#2
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Master is JUNK...
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As for a power bleeder, read this thread: http://www.peachparts.com/shopforum/showthread.php?p=772866&posted=1#post772866
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
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Sure would suck to put in a new o-ring, bleed the entire system, and find that it still leaks.
With rebuilt masters going for $50, seems like good piece of mind to know you are not going to have to deal with it any time soon....
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Think Alternative Energy! 300CD '80 (now gone but not forgotten...) |
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I changed the seal on it and it totally stopped leaking. The gasket was less than a dollar and it took a bit to get it replaced. First you need to drain the contents and then remove and install. Once you get that done you need to bleed your entire system.
It worked for me and there is not a single drop coming out. There are two of them and I had a leak in the one closer to the front of the car.
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Audi TT |
#5
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Mine is doing the same thing....brake light is turning on when the fluid level gets low..I had my buddy check @ the dealer and I think he told me you can only buy the complete master cylinder from MB...anyway it sure is nice having a connection for MB parts
I pay what the dealer pays for them..screw that 300% markup!!
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1992 300TE 4matic - Just obtained 12/22/06 1983 300D - SOLD 1997 Dodge 2500 - CTD 400+HP, 1100ft/lbs torque |
#6
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whunter,
Thanks for that link. I'm sold. Santa's bringing me a Power Bleeder! Jimmy Joe, Where did you find one for $50? They are $90 - 100+ online. I agree that it's gotta be worth $50 not to have to re-do the job. NAPA maybe? Mark
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1983 300D 308,000 mi (Daily driver). |
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http://***************/catalog/lookup_parts.cfm?SubcategoryID=1836&VehicleID=1193778&CFID=373080&CFToken=77294190 Please make sure this is the right one for your car by going through the car "selection" process on the left, and double checking part #s with other resources. You don't want the wrong master. All the various models are about the same price. I notice that is a different part # than mine...hmmm Also of note is that the "Master Cylinder Repair Kit" is $83!! Go figure!
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Think Alternative Energy! 300CD '80 (now gone but not forgotten...) Last edited by Jimmy Joe; 12-18-2004 at 12:57 AM. |
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#9
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Any opinions on whether ATE or Girling is better? The Girling costs more and is gold colored, so it's perfect for the Benz, right? Mark
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1983 300D 308,000 mi (Daily driver). |
#10
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Quality
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#11
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The piston rod seal in the master cylinder is shot. Rebuild or replace.
Make sure you wash the brake fluid off the inner fender completely, or it will gradually eat the paint off, starting some hard to repair rust. Also check to make sure you don't have a booster half full of brake fluid! Peter
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1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs! |
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