Help! Brake Fails After Diy Front Rotors And Pads

[omni]

Hello everyone,

I tried to DIY front rotors and pads on my 97 ES300, but after I finished, I found the brake didn't work because the brake fluid level in the reservior no longer changed on matter I pressed the brake pedal or not, consequently I even couldn't turn the key to ignite the car.

The only thing I might be wrong is that I pressed the brake pedal (a little hard) after both calipers were taken off the torque plate.

Please HELP!!!!!!!!!!!!!!!!!!

[Toysrme]

Bleed the brakes.

Why couldn't you turn the key to crack the car?

[omni]

To turn the key, the brak pedal has to be pressed.

Why should I bleed the brakes fluid?

Thanks!

Bleed the brakes.

Why couldn't you turn the key to crack the car?

[Toysrme]

Because you should always bleed the fluid during a pad change.

I think you changed the pads, which shoved out brake fluid & sucked air in the lines.

[omni]

I didn't bleed the fluid, so no air could go into the tubes, couldn't it?

Do you think if it's possible that I damaged something when I pressed break pedal while the caplipers were off?

Thanks!

[Toysrme]

When you change worn pads to new pads you recompress the pistons greatly. This shoves fluid back up into the brake resivior, which if it was full at the time of pad changing, will blow fluid out the over-fill drain. When you've finished, the brake fluid settles back down after adjustment & now the empty void is filled with air.

You always bleed brakes when you change brake pads. It shoul be done every 3 years or so anyway. Moisture inb rake fluid sucks. Makes it boil at almost 1/2 the temp.

[omni]

Do you think if the piston in master cyliner was screwed up when I pressed the brake pedal and the capliper was off????

When you change worn pads to new pads you recompress the pistons greatly. This shoves fluid back up into the brake resivior, which if it was full at the time of pad changing, will blow fluid out the over-fill drain. When you've finished, the brake fluid settles back down after adjustment & now the empty void is filled with air.

You always bleed brakes when you change brake pads. It shoul be done every 3 years or so anyway. Moisture inb rake fluid sucks. Makes it boil at almost 1/2 the temp.

[Toysrme]

No, notings broken. I simply think you've got air in the lines or the master cyl. Bleed them the correct way. You'll be OK.

[SKperformance]

I am still lost how you need to press the brake pedal to start the car?

If you owned a newer ES350 with puch button start then you would have to press the brake but not in a 300 !

[omni]

You might be right, but as a matter of fact, I couldn't turn the key to crank the car, I don't know why brake works could mess up the ignition.

Anyone has a clue????

Thanks!

I am still lost how you need to press the brake pedal to start the car?

If you owned a newer ES350 with puch button start then you would have to press the brake but not in a 300 !

I forgot to mention one thing here. since I only have a little time to work on my car, the baby has been on the jack stand and tilted up for a whole week, could it mess up something??

Thanks!

I am still lost how you need to press the brake pedal to start the car?

If you owned a newer ES350 with puch button start then you would have to press the brake but not in a 300 !

[Toysrme]

Safety switch.

It may require you to trip the brake light switch on the brake pedal before the ECU will start the car, just like you have to trigger that switch to shift out of park. That's a guess as to why you can't crank it. I've never lived with an '02 330, so no idea if they're suppose to do that.

No, sitting on jackstands won't hurt the car provided you're near the correct jacking points. I think mine sat on jackstands about 2 months straight last year.

[omni]

Actually I am not 100% sure that I must press the brake pedal to start the car, can anyone who has 97 es300 confirm it??

I changed engine oil a couple of month ago and found that I couldn't even turn the key after the oil was released (but before refill it). I guess a sensor in the engine would detect the oil pressure, if the pressure is not right, we can't turn the key to start the car.

Because my car has been on the jackstands (not horizontally) for a while, it may affect the engine oil level to prevent me from starting the car.

of course, it's my wild guess.

Safety switch.

It may require you to trip the brake light switch on the brake pedal before the ECU will start the car, just like you have to trigger that switch to shift out of park. That's a guess as to why you can't crank it. I've never lived with an '02 330, so no idea if they're suppose to do that.

No, sitting on jackstands won't hurt the car provided you're near the correct jacking points. I think mine sat on jackstands about 2 months straight last year.

[camlex]

No you don't needs to press brake to START car.

Once car started, you needs to press brake to shift from P to D or R

Hope that helps.

[omni]

Thank you for the confirmation.

No you don't needs to press brake to START car.

Once car started, you needs to press brake to shift from P to D or R

Hope that helps.

[omni]

Hi Toysrme,

Could you explain why the aie in brake lines prevent me from turning the key to crank the car??

Thanks!

No, notings broken. I simply think you've got air in the lines or the master cyl. Bleed them the correct way. You'll be OK.

[backwoods lex]

Starting your car with no oil in it would be a very bad idea.

[Guest snugglebunnies]

:chairshot:

Edited September 2, 2006 by SKperformance

[Toysrme]

Hi Toysrme,

Could you explain why the aie in brake lines prevent me from turning the key to crank the car??

Thanks!

It wouldn't. It causes your brake pedal to fall.

[SKperformance]

Snuggle I hope to never read another response as the level shown in this thread or any other again.

If you have nothing good to say .............

[anthonyiez]

i'd check to make sure you didn't twist the brake hoses when putting the calipers back on.