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Old 12-20-2015   #1
secondchance
 
Join Date: Aug 2006
Location: McLean, VA
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Default Brake pedal too low

I drove out to Jim's yesterday to help with replacing Charlie's heater ore. Driving out, noticed brake engagement point was a bit too low compared to what I am use to. Driving back, either I was focusing on this or got even lower. Brake warning light is not triggered and seem to have sufficient hydraulic pressure. Fluid level in the reservoir is normal and noticed no leakage. Anyone had similar issue?
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Old 12-20-2015   #2
Dynomite
 
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Default Re: Brake pedal too low

Quote:
Originally Posted by secondchance View Post
I just bought one from Corvette Central. I haven't compared side to side yet but looks very close.
This was Nov 10th 2015 just for some background.....what you bought was a Stock Brake Fluid Reservoir on Nov 10, 2015. I suggest if you installed this and did not put much driving on it you probably have some air in the brake lines. If you did not install the new brake fluid reservoir, whatever issue you had thinking you needed one probably still remains

Quote:
Originally Posted by secondchance View Post
I drove out to Jim's yesterday to help with replacing Charlie's heater core.
Does Charlie have heat?

Last edited by Dynomite; 12-20-2015 at 09:40 AM.
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Old 12-20-2015   #3
WVZR-1
 
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Default Re: Brake pedal too low

Later C4's have the "prime pipe" and ASR, I really don't understand nor have I read much about the later system vs the earlier but it might be something to look into.
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Old 12-20-2015   #4
secondchance
 
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Default Re: Brake pedal too low

Quote:
Originally Posted by Dynomite View Post
This was Nov 10th 2015 just for some background.....what you bought was a Stock Brake Fluid Reservoir on Nov 10, 2015. I suggest if you installed this and did not put much driving on it you probably have some air in the brake lines. If you did not install the new brake fluid reservoir, whatever issue you had thinking you needed one probably still remains
Have not replaced the reservoir yet.


Quote:
Originally Posted by Dynomite View Post
Does Charlie have heat?
Yes. Minus coolant dripping into the passenger side. I have no idea how you replaced the heater core without pulling the dash pad. We had his dash pretty much gutted to get to the heater core. Now I know what is involved.
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Old 12-20-2015   #5
secondchance
 
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Default Re: Brake pedal too low

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Originally Posted by WVZR-1 View Post
Later C4's have the "prime pipe" and ASR, I really don't understand nor have I read much about the later system vs the earlier but it might be something to look into.
Does it ever end?!
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Old 12-20-2015   #6
Dynomite
 
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Default Re: Brake pedal too low

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Originally Posted by secondchance View Post
I have no idea how you replaced the heater core without pulling the dash pad.
Magic
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Old 12-20-2015   #7
secondchance
 
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Default Re: Brake pedal too low

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Magic
I propose a new forum handle for Cliff (a.k.a. Dynomite) - wizard!
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Old 12-21-2015   #8
secondchance
 
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Default Re: Brake pedal too low

Pedal feel and firmness seems normal with the motor off. Once motor is started, pedal travels more than what I am use to before getting firm. Pumping doesn't bring the pedal up.
Anyone had similar experience?
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Old 12-21-2015   #9
Dynomite
 
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Default Re: Brake pedal too low

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Originally Posted by secondchance View Post
Pedal feel and firmness seems normal with the motor off. Once motor is started, pedal travels more than what I am use to before getting firm. Pumping doesn't bring the pedal up.
Anyone had similar experience?
Power Brake Booster which I am thinking what you experience is normal when the brake booster comes on with engine running.

Troubleshoot Power Brake Booster

Hold pressure on the pedal while you start the engine. When the engine starts, the pedal should drop about a 1/4", this indicates that the Brake Booster is working properly.

If you have air in the brake lines the difference might be greater.

Last edited by Dynomite; 12-21-2015 at 08:50 AM.
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Old 12-21-2015   #10
secondchance
 
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Default Re: Brake pedal too low

Quote:
Originally Posted by Dynomite View Post

Hold pressure on the pedal while you start the engine. When the engine starts, the pedal should drop about a 1/4", this indicates that the Brake Booster is working properly.

If you have air in the brake lines the difference might be greater.
That drop is more than 1/4". Time to bleed the brakes. Actually, flush the whole system - lucky me!
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