Brake pedal too low

[secondchance]

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?

[Dynomite]

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 ;)

I drove out to Jim's yesterday to help with replacing Charlie's heater core.

Does Charlie have heat?

[WVZR-1]

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.

[secondchance]

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.



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.

[secondchance]

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?!

[Dynomite]

I have no idea how you replaced the heater core without pulling the dash pad.

Magic :D

[secondchance]

Magic :D

I propose a new forum handle for Cliff (a.k.a. Dynomite) - wizard!

[secondchance]

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?

[Dynomite]

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 (http://www.classicperform.com/TechBook/BrakeTroubleshoot.htm#testbooster)

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.

[secondchance]

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!

[Gunny]

.... Time to bleed the brakes ....

If you haven't already installed them, consider installing speed bleeders before you do bleed the system. Not terribly expensive and makes bleeding the brakes a reasonably quick & easy, one person job. I know there are other recommended methods but speed bleeders have been very helpful to me. I no longer dread the job and consequently do it much more frequently than I used to ... definitely before/after track events/hard driving. And fwiw, I'm using a really good bang-for-the-buck as well as readily available brake fluid (dare I say it?) ... Ford HD.

[secondchance]

If you haven't already installed them, consider installing speed bleeders before you do bleed the system. Not terribly expensive and makes bleeding the brakes a reasonably quick & easy, one person job. I know there are other recommended methods but speed bleeders have been very helpful to me. I no longer dread the job and consequently do it much more frequently than I used to ... definitely before/after track events/hard driving. And fwiw, I'm using a really good bang-for-the-buck as well as readily available brake fluid (dare I say it?) ... Ford HD.

That's what I am going to do - Russell 639540. Never knew of this product.

Thanks!

[rkreigh]

If you haven't already installed them, consider installing speed bleeders before you do bleed the system. Not terribly expensive and makes bleeding the brakes a reasonably quick & easy, one person job. I know there are other recommended methods but speed bleeders have been very helpful to me. I no longer dread the job and consequently do it much more frequently than I used to ... definitely before/after track events/hard driving. And fwiw, I'm using a really good bang-for-the-buck as well as readily available brake fluid (dare I say it?) ... Ford HD.

hey Ford DOES have a better idea every now and then and this brake fluid is the bomb.

I like the motul stuff too.

[nelson007]

Yun,
I had the same problem on my 67 two weeks ago, replaced power brake booster and that solved the problem.
Nelson

[secondchance]

Yun,
I had the same problem on my 67 two weeks ago, replaced power brake booster and that solved the problem.
Nelson

Upon close inspection, I noticed fitting on the plenum for the brake vacuum booster was loose. Once tightened pedal height seems ok. Nonetheless, I'm going to flush the brake fluid - been 3-4 years since the last flush.

[WVZR-1]

Upon close inspection, I noticed fitting on the plenum for the brake vacuum booster was loose. Once tightened pedal height seems ok. Nonetheless, I'm going to flush the brake fluid - been 3-4 years since the last flush.

Yes you always need to check "where you've most recently been". The symptoms certainly screamed BOOSTER, good it was maybe just the vacuum source.

Speed bleeders are either "love 'm or hate 'm" and they're not all created equal it seems. The 639540 I guess is spec'd for your calipers? Wilwood?

[secondchance]

Yes you always need to check "where you've most recently been". The symptoms certainly screamed BOOSTER, good it was maybe just the vacuum source.

Speed bleeders are either "love 'm or hate 'm" and they're not all created equal it seems. The 639540 I guess is spec'd for your calipers? Wilwood?

Yes. I ordered Russell 639540.

[nelson007]

Yun,
Who did you buy them from, I need to order some?
Nelson

[WVZR-1]

Yun,
Who did you buy them from, I need to order some?
Nelson

Be sure to match bleeders to your calipers. Yun's application is different than most.

[secondchance]

Yun,
Who did you buy them from, I need to order some?
Nelson

If it's for 84 through 04 Corvette you need Russell 639630.

http://www.ebay.com/sch/i.html?_odkw=1998+corvette+bose+speaker&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xrussell+6 39630.TRS1&_nkw=russell+639630&_sacat=0