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Old 02-01-2009, 05:00 PM   #1
Dark_Templar
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Default Leaking brake fluid =[

So just the other day i was driving and all of a sudden my brake light went off but my E-Brake wasnt deployed and i could feel my brake gradually start sinking and i checked my brake fluid and it was almost all empty, so i added more and bled my brake lines and it worked for about 5 hours and the light went off again.
It kept going on and off for about 10 minutes then went completly solid.
Check my lines and they werent leaking.
any ideas on what i can do stop the leaking?
It might be my master cylinder im thinking?
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Old 02-01-2009, 05:17 PM   #2
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Default Re: Leaking brake fluid =[

Quote:
Originally Posted by Dark_Templar View Post
So just the other day i was driving and all of a sudden my brake light went off but my E-Brake wasnt deployed and i could feel my brake gradually start sinking and i checked my brake fluid and it was almost all empty, so i added more and bled my brake lines and it worked for about 5 hours and the light went off again.
It kept going on and off for about 10 minutes then went completly solid.
Check my lines and they werent leaking.
any ideas on what i can do stop the leaking?
It might be my master cylinder im thinking?
I would check the entire system for leaks but 18 of 20 times it's the Brake Master Cylinder. It corrodes from the inside from water ladened brake fluid and renders the machined piston bore useless. It will require replacement if everything else checks out.

P
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One more "What's the Top Speed..." thread and I think I'll flame someone
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Old 02-01-2009, 05:42 PM   #3
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Default Re: Leaking brake fluid =[

Quote:
Originally Posted by P_Adams View Post
I would check the entire system for leaks but 18 of 20 times it's the Brake Master Cylinder. It corrodes from the inside from water ladened brake fluid and renders the machined piston bore useless. It will require replacement if everything else checks out.

P
thanks for the reply.
Have any idea how much for the master cylinder on a 99 accord J30A1?
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Old 02-01-2009, 06:54 PM   #4
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Default Re: Leaking brake fluid =[

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Originally Posted by Dark_Templar View Post
thanks for the reply.
Have any idea how much for the master cylinder on a 99 accord J30A1?
TAS Automotive
http://www.tasauto.com/Product/Browse.aspx?d=1100&p=1
$109.00 Genuine Honda OEM V6

Parts Geek (Adler)
http://www.partsgeek.com/catalog/1999/honda/accord/brake/brake_master_cylinder.html
$99.00 Aftermarket

Saccucci Honda
http://www.hondapartsdeals.com/hpa_parts_list.php?vin=&Label%5BProductID%5D=ACCOR D&Label%5BYearID%5D=1999&Label%5BDoorID%5D=4&Label %5BGradeID%5D=LXV6&Label%5BAreaID%5D=KA&Label%5BTr ansmissionID%5D=4AT&Label%5BSectionID%5D=CHASSIS&L abel%5BIllustrationGroupID%5D=MASTER+POWER+%281%29 &ProductID=5&YearID=17&DoorID=4&GradeID=48&AreaID= 2&TransmissionID=5&SectionID=6&IllustrationGroupID =3278
$104.00 Genuine Honda OEM

P
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One more "What's the Top Speed..." thread and I think I'll flame someone
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Old 02-04-2009, 05:30 AM   #5
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Default Re: Leaking brake fluid =[

Quote:
I would check the entire system for leaks but 18 of 20 times it's the Brake Master Cylinder. It corrodes from the inside from water ladened brake fluid and renders the machined piston bore useless. It will require replacement if everything else checks out.

P

To inquiry on what P said ---

Does that lead to the leak that is seen when brake fluid is in between the booster and master cylinder?
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Old 02-04-2009, 06:00 AM   #6
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Default Re: Leaking brake fluid =[

Don't buy the master cylinders from Autozone.

I've replaced 3 within a year from them for my '92 Mustang.

Don't get the refurbished ones.
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Old 02-04-2009, 06:28 AM   #7
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Default Re: Leaking brake fluid =[

^ Lifetime warranty + half the cost + rebuilt OEM Nissin?

I'll take it
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Old 02-04-2009, 08:03 AM   #8
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Default Re: Leaking brake fluid =[

^I'll take you home tonight.
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Old 02-04-2009, 10:38 AM   #9
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Default Re: Leaking brake fluid =[

Quote:
Originally Posted by lunarone View Post
To inquiry on what P said ---

Does that lead to the leak that is seen when brake fluid is in between the booster and master cylinder?
Short answer: YES
The fluid is making it's way past the Piston / Cylinder Bore seal and making it's way out past the Pushrod Seal.
In really bad cases, the Brake Fluid sometimes makes it's way into the brake booster; attacking the Vacuum Diaphram.

P
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One more "What's the Top Speed..." thread and I think I'll flame someone
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1990, 1996, 96, accord, booster, brake, break, cylinder, fluid, honda, leak, leaking, losing, master, s2000

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