How do you bleed the brakes if when you pump the brake pedal a couple of times it makes your pedal go all the way to the top really stiff?? Need some info on this..about to do it in a couple of hours, thanks..


Modified by bOOsTiNSoHcVtEc at 2:26 PM 5/17/2004

 

I don't understand your question? are you asking how to manually bleed the brakes with 2 people so the pedal does become more stiff?

 

no i mean...b4 we even start to bleed the brakes your suppose to pump it a few times then hold it down right?? but when you pump it a few times the pressure gets stiff and moves all the way to the top. Here is the reason why im bleeding them https://honda-tech.com/zerothread?id=859659

 

If the pedal is getting really stiff then I'm going to gurantee that your car is off. Make sure you turn you car on while bleeding your brakes

 

your car has to be on while bleeding brakes???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bOOsTiNSoHcVtEc &raquo;</TD></TR><TR><TD CLASS="quote">your car has to be on while bleeding brakes???</TD></TR></TABLE>
yes or it won't work, how do you think the Brake booster works? LOL

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wickedEFguy &raquo;</TD></TR><TR><TD CLASS="quote">
yes or it won't work, how do you think the Brake booster works? LOL </TD></TR></TABLE>

This is the first time I've heard of this. I've never left my car on while bleeding the brakes.

Here's the method I've used:

1) Put a hose over the brake bleeder valve
2) With valve closed, have somemone pump the brakes until its firm.
3) Release the valve and let the fluid drain out until the pedal is completely down.
4) While your friend holds the pedal down tighten the valve
5) Repeat the above and add fluid to MC as the brake fluid level drops.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by timmy8151 &raquo;</TD></TR><TR><TD CLASS="quote">

This is the first time I've heard of this. I've never left my car on while bleeding the brakes.

Here's the method I've used:

1) Put a hose over the brake bleeder valve
2) With valve closed, have somemone pump the brakes until its firm.
3) Release the valve and let the fluid drain out until the pedal is completely down.
4) While your friend holds the pedal down tighten the valve
5) Repeat the above and add fluid to MC as the brake fluid level drops.</TD></TR></TABLE>

What in the hell?

Everytime I've done it I just slightly loosen the bleeder bolt and let fluild come out until no more bubbles come out. I do that or use a auto-bleeder, might I add this is with the car running

Dude when you car is off and your trying to pump on the pedal you don't have any pressure to begin with other then what's left in the booster.

If you don't have any vacuum how are you supposed to create pressure and move fluid?

 

You don't have to have your car running when you bleed your brakes. The vacuum is there to help the brake booster which multiples the force when you press the brake pedal. Its better to not have your engine running when you bleed your brakes. (you say that the engine has to be running, then how on earth do we bleed our motorcycle brakes? there is no vacuum lines)

 

There is no need to run the car while bleeding the brakes. I work at a dealership and have never seen it done with the motor running. The method described by 'timmy8151' is the one used by all of the technicians. I'm not sure if doing it with the motor running is bad, but I do know that it isn't necessary.

 

Yea lay off the zoloft The brake booster does just that, boosts the pressure you're putting down yourself. Do it with the engine off.

I have a curious question, I have heard people say not to let the pedal hit the floor when bleeding the brakes as it could bottom out the piston in the MC. Has anyone else heard this?

 

well i did it with the car on cause i didnt get a chance to see what others posted and im still stuck with the same problem in the link provided above..there is slightly a lil more pressure but same problem. Should i try it with the car off? Also I would like to know the answer to sporkcrx's question too.

 

ok well I've always done it with the car on but I'll have to try that method that timmy was talking about

when you press down the pedal and the car is off your going to lose pressure and it's going to get stiff. That's normal

That's why I said you should do it will it's on or just go buy a auto bleeder

Correct me if I'm wrong but if you have no pressure at all the brake pedal will go all the way to the floor correct? Also there should be low fluid right?

 

Okay.... I't doesnt matter if the vehilce is on or off. All the power booster does is help easy the amout of brake pedal effort that is needed to stop the car. If the car
is not moving and the bleader is being opened there would be not need for an easy pedal.

When you bleed your brakes it's recomeded to do it in sequence. Start with the bleader that is furthest from the master cylinder, with if you have a honda will be the right rear. Pump the pedal three times then hold it. Open the bleader and alow your foot to push the pedal to the floor. Keep the pedal on the floor until the bleader is closed by whom ever is helping you. Repeat this a few times. Next you will blead the left rear, followed by the front right, and lastly the front left. Once this is done there should be no air left in the system. Make sure you didn't run out of fluid in the resevore when you blead the brakes.

If your still haveing a problem with the brake pedal droping you may have a bad master cylinder. If you push on the pedal slow does it drop; but when you push on it fast is it hard? If thats the case you have a bad master cylinder.

 

"If you push on the pedal slow does it drop; but when you push on it fast is it hard?"

Yes..and sometimes its the other way too, wen i push fast it drops and wen i push slow its hard

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">I have a curious question, I have heard people say not to let the pedal hit the floor when bleeding the brakes as it could bottom out the piston in the MC. Has anyone else heard this?</TD></TR></TABLE>Yeah... it's not about bottoming out the MC, but here goes.

Under normal use, the MC never uses the bottom 1/3 of it's stroke. So maybe there's crud, corrosion, or just the cylinder wall isn't polished real good. If you stroke the MC down thru that area, you might damage the piston seal. That's maybe(?) one reason for your MC to fail somewhere down the road.

The idea makes sense to me, but nobody's ever actually proved it to me. I've always pumped the pedal all the way down, & I've only had one MC fail between lots of cars & lots of miles. But I've started putting a block of wood under the pedal when I bleed brakes.

Bleeding the clutch doesn't have the same issue. You ALWAYS use the entire stroke of the MC, every time you use the clutch.