Stuck Brake Pedal

[CJM]

Like the pedals falling overnight?

Perhaps the masters bad, bleeding off pressure.

[fenrisx]

Like the pedals falling overnight?

Perhaps the masters bad, bleeding off pressure.

The pedal doesn't fall or anything. It's up all the way, and is just stuck in that position.

[CJM]

Do you have access to a buddy? Do the 2 man bleed method, all you need is a 10mm wrench iirc.

Or you could build a self bleeder if you have a small air compressor, its like 20 bucks worth of plumbing fittings and an adjustable air gauge.

No real mechanics shops by you that are cheaper btw?

[fenrisx]

Well I've already paid the Firestone place to bleed 'em, and replace the fluid with new. It didn't seem to do the trick though.

I still need to get the driver side rear wheel cylinder replaced (already done the pass. side as mentioned in an earlier post), but it wasn't that bad when I replaced the drums and shoes.

It's only happened once in the past couple of weeks.. granted it just got super cold again this week.. which is when it happened.

Do you have access to a buddy? Do the 2 man bleed method, all you need is a 10mm wrench iirc.

Or you could build a self bleeder if you have a small air compressor, its like 20 bucks worth of plumbing fittings and an adjustable air gauge.

No real mechanics shops by you that are cheaper btw?

[Seanz0rz]

is it wet? could water be freezing between the drums and shoes or between the discs and pads?

[fenrisx]

I guess that could be. With all the snow and stuff here.

[fenrisx]

Just wanted to update this thread... still have the problem. After a lot of digging around I found that this is actually pretty common on Toyotas. The problem seems to be a check valve. I'm having a hard time finding a part# for this tonight.. regardless, where would you guys recommend buying it? If it's cheap enough I'll just get it form the dealership.

[Seanz0rz]

dealer only. I wouldn't put anything less on my brakes.

[Seanz0rz]

part number 44730-60060 valve assembly, vacuum check (brake). this is the only check valve i can find for the brake system. list price is right around 46 dollars.

i have no idea if that is indeed your problem or not. or even how to diagnose it.

if you need any other part numbers, let me know.

[MTL_4runner]

Here's a few photos for you that should help with that.

You can replace it but I would see if you can free it up a bit first with some PB blaster and compressed air (remember it works on vacuum so the compressed air would go the opposite way from the hose nipple on the check valve). You should be able to verify if it works or not to be sure that is in fact your issue.