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  #1  
Old 01-27-2009, 01:55 PM
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Brake Master cylinder leaking

My brake master cylinder on a 1984 300 CD is leaking at the front of the cylinder where it attaches to the metal barrel. Is the rubber part replaceable or do I have to replace the entire master cylinder?


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  #2  
Old 01-27-2009, 02:48 PM
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I've seen rebuild kits, but you can get reman MC's affordably.
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1986 300SDL - Coda
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1995 - E320
1985 300CD - Gladys
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  #3  
Old 01-27-2009, 03:01 PM
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Brake Reservoir Grommet seems to be where it is leaking from. I wonder how much trouble it is to remove the top to replace it.

Has anyone done this repair?
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2003 Harley Ultra
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  #4  
Old 01-27-2009, 03:04 PM
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It's not hard to do. The reservoir just pops off, but you may have to bench bleed the MC after replacing the reservoir unless you're careful.

EDIT: Meaning you need to remove the fluid from the reservoir, pop it off, pull the seals and replace, then pop the reservoir back on and refill. If you're careful and don't introduce any air, you'll be fine.

While the reservoir is off, you can put it in your dishwasher on the top rack and it will come out looking new.
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Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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  #5  
Old 01-27-2009, 03:07 PM
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the MC should be pretty cheap...i'd replace. if the MC is $$$ then I might consider trying a rebuild kit. take it apart and see if the bore and piston are pitted. if they are clean and shiny try a rebuild kit...just for personnal satisfaction and triumph over today's throw-away mentality
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  #6  
Old 01-27-2009, 03:36 PM
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Well the brakes are fine no problem stopping. The less I spend the better. . Putting it in the dishwasher with my wife around .
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1985 300 TD GG done in by a red light runner
1984 300 CD Sold
2008 Titian
2000 Cadillac SLS
1966 FLH Sold
2003 Harley Ultra
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  #7  
Old 01-27-2009, 03:44 PM
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Just get the heavy stuff off it with brake cleaner first. I've done it in my dishwasher and it doesn't hurt anything. Sneak it in the dishwasher and then put all the dishes away when the cycle is done to "help out".
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2006 Nissan Pathfinder LE
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OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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  #8  
Old 01-27-2009, 03:47 PM
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I would bleed (not flush) the system after you finish - just to be sure. This is a simple chore and well worth it.
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  #9  
Old 01-27-2009, 03:48 PM
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We have a Bed & Breakfast I can just see my wife if a Guest wondered into the kitchen and they saw me removing a car part with dishes.

On another note has anybody used a 300CD as a casket?
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1985 300 TD GG done in by a red light runner
1984 300 CD Sold
2008 Titian
2000 Cadillac SLS
1966 FLH Sold
2003 Harley Ultra
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  #10  
Old 01-27-2009, 09:20 PM
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I wouldnt let it go on leaking for too long. The brake booster (barrel thing) could get damaged from leaking brake fluid. Been there done that recently, Good luck, Jim

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