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Brakes dragging after master cylinder install

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Old Aug 8, 2010 | 05:05 PM
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Default Brakes dragging after master cylinder install

So I installed a new brake master cylinder on my Da teg and Ive been having an issue with my front brakes dragging really bad since then. Its not a dd so its sitting at the moment. Anyways I bench bled the master and have bleed each wheel. The car seems fine but after a little bit of driving the fronts starting dragging bad like you can feel it slowing the car down. Think its a faulty master cylinder or is there something I need to adjust?
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Old Aug 8, 2010 | 08:30 PM
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Default Re: Brakes dragging after master cylinder install

Adjust your booster push rod length to establish the proper clerance. Likely 0.2mm
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Old Aug 9, 2010 | 10:05 AM
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Default Re: Brakes dragging after master cylinder install

How do you adjust that?
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Old Aug 9, 2010 | 12:04 PM
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Default Re: Brakes dragging after master cylinder install

Originally Posted by ncsi
How do you adjust that?
Thats what manuals are for!!
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Old Aug 9, 2010 | 12:38 PM
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Default Re: Brakes dragging after master cylinder install

Thanks for the help buddy! I know its on the back of pedal to booster. But I dont think this is the problem. Anyone else?
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Old Aug 9, 2010 | 02:02 PM
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Default Re: Brakes dragging after master cylinder install

Originally Posted by ncsi
Thanks for the help buddy! I know its on the back of pedal to booster. But I dont think this is the problem. Anyone else?
Look I told you what the problem is I am not going to spoon feed you. You may not think it is your brake problem however with certainty I can tell you it is.

You have positioned the piston cups in your master cylinder over the master cylinder compensating ports and fluid can no longer return to your reservoir tanks. After a few stops your brake fluid expands through heat and your brakes go on temporarily until the fluid cools and contracts releasing the calipers.


Get a manual and read it, you can find them online many places http://www.hondahookup.com/manuals/ !
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Old Aug 9, 2010 | 02:29 PM
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Default Re: Brakes dragging after master cylinder install

ok I'll take a peak if your certain ;P
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Old Aug 9, 2010 | 04:27 PM
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Default Re: Brakes dragging after master cylinder install

Originally Posted by ncsi
So I installed a new brake master cylinder on my Da teg and Ive been having an issue with my front brakes dragging really bad since then. Its not a dd so its sitting at the moment. Anyways I bench bled the master and have bleed each wheel. The car seems fine but after a little bit of driving the fronts starting dragging bad like you can feel it slowing the car down. Think its a faulty master cylinder or is there something I need to adjust?
u didnt happen to get a abs or a non abs master cylinder bc they have have to match with the brake booster or this will happen found out when i deleted the abs on my friends car they would start out ok then they would drag to the point it would all most stop the car
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Old Aug 9, 2010 | 06:38 PM
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Default Re: Brakes dragging after master cylinder install

is there a way to tell on booster. I dont have abs but I think it was deleted when before I got car...
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Old Oct 24, 2010 | 04:10 PM
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Default Re: Brakes dragging after master cylinder install

I realize this is an old thread, however I dealt with and solved what might the issue at hand. An ABS booster and a non-ABS booster must match the m/c. For example, ABS mc with ABS booster and non-ABS mc with non-ABS booster. My brakes would drag something terrible and I'd be at WOT at 45 mph 3rd gear just to stay moving. I had an ABS booster with a non-ABS mc. Put on a non-ABS booster and no more dragging.
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Old Oct 24, 2010 | 04:16 PM
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Default Re: Brakes dragging after master cylinder install

Originally Posted by be18see1
I realize this is an old thread, however I dealt with and solved what might the issue at hand. An ABS booster and a non-ABS booster must match the m/c. For example, ABS mc with ABS booster and non-ABS mc with non-ABS booster. My brakes would drag something terrible and I'd be at WOT at 45 mph 3rd gear just to stay moving. I had an ABS booster with a non-ABS mc. Put on a non-ABS booster and no more dragging.
I'll add a +1 to that....I had an ABS booster with non-ABS master cylinder and it would not release enough. Several blocks of driving and you could start to feel greater-and-greater drag. Adjustment won't fix it, you have to get the matching parts
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Old Oct 24, 2010 | 04:55 PM
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Default Re: Brakes dragging after master cylinder install

so i'm kind of int his situation right now,

i told the parts guy my car had abs so im guessing he gave me a mc with abs. i've compared both of them and they both look the same

how would i go about fixing this problem
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Old Oct 24, 2010 | 04:59 PM
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Default Re: Brakes dragging after master cylinder install

Originally Posted by kelviiv
so i'm kind of int his situation right now,

i told the parts guy my car had abs so im guessing he gave me a mc with abs. i've compared both of them and they both look the same

how would i go about fixing this problem
the difference is the booster, due to the different amount of travel for each master cylinder.
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Old Oct 24, 2010 | 05:03 PM
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Default Re: Brakes dragging after master cylinder install

ok they sized up the same so im more than likely sure he gave me the correct part.

anyways since we're on topic about brakes dragging. i did everything right but i did not bench bleed. i have bleed each side with a 1 full big bottle of brake fluid per side. my brakes still have air and takes a while for it to actually catch,

any ideas?
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Old Oct 25, 2010 | 09:41 AM
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Default Re: Brakes dragging after master cylinder install

You should bench bleed it.
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Old Oct 25, 2010 | 01:08 PM
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Default Re: Brakes dragging after master cylinder install

I had a faulty master cylinder. Took it back got a new one did the same thing I did with the first one on install and have had no problems since!
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