99 Elantra GLS w/ 4 Wheel disk and ABS: Brake Bleeding Question
 

I was wondering if anyone could tell me if I must use the Hyundai scan tool
to bleed the brakes or can I just start the car and run the engine to
enable the ABS system?

Also, if I am replacing just the 2 rear calipers, do I need to bleed all
4?

Thanks!

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Re: 99 Elantra GLS w/ 4 Wheel disk and ABS: Brake Bleeding Question
 

Prepare the system and the new parts to transfer everything quickly. If
there's a significant delay, you can pinch off the brake hose to prevent
excessive fluid loss. (This isn't typically acceptable, but for a DIY
repair, it's probably worse to allow the fluid level to get so low you
start getting air in the upper portion of the lines.) As long as you keep
the fluid level in the master cylinder above the minimum level, you can
just bleed the two wheels where you did the work. Don't start the car,
either. Activation/self-test of the ABS unit can move the fluid around.
Bleed the system like any other car, taking care to be certain the fluid
in the master cylinder doesn't get too low.

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Re: 99 Elantra GLS w/ 4 Wheel disk and ABS: Brake Bleeding Question
 

"hyundaitech" <notpublic@not.public.com> wrote in message
news:b587abe1edb8451a1f6448079954e0eb@localhost.ta lkaboutautos.com...
> Prepare the system and the new parts to transfer everything quickly. If
> there's a significant delay, you can pinch off the brake hose to prevent
> excessive fluid loss. (This isn't typically acceptable, but for a DIY
> repair, it's probably worse to allow the fluid level to get so low you
> start getting air in the upper portion of the lines.) As long as you keep
> the fluid level in the master cylinder above the minimum level, you can
> just bleed the two wheels where you did the work. Don't start the car,
> either. Activation/self-test of the ABS unit can move the fluid around.
> Bleed the system like any other car, taking care to be certain the fluid
> in the master cylinder doesn't get too low.

A good tip to prevent too much fluid loss is to top the reservoir right up,
and then put some cling-film over the opening, then if you can screw the cap
back on, or else use a elastic band to hold the film. The vacuum over the
top of the fluid then prevents it from leaking out.

Jeff

Re: 99 Elantra GLS w/ 4 Wheel disk and ABS: Brake Bleeding Quest
 

Thanks for the advice, I finally did get to this project and it worked
well. I kept the hose end held high and lost a minimal amount of fluid
out of the hose or let the resevoir go low. The only thing I noticed is
that when I drive, the first push on the pedal goes down further than the
second or subsequent presses. It is solid, not "spongy", just more travel
on the pedal. Not all the way to the floor, but it is noticeable. The
car has 127k miles on it. Could that be a master cyl. problem or do you
think there is air still in the line?

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Re: 99 Elantra GLS w/ 4 Wheel disk and ABS: Brake Bleeding Quest
 

It's more likely that something is pushing the caliper piston in too far.
Check to make sure that the pads aren't hanging up and that the pad shims
aren't catching on the caliper.

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