Brake caliper replacement, no fluid or air coming from bleeder valve

gmc
jimmy

#1

I replaced both rear pads calipers on my jimmy. Its 4 wheel drive. Now after installing them, I tried to them, and i nothing from the bleeder valve s. Someone said I could have the wrong caliper on the wrong side? Is that even possible? Also, the manual food this truck says it may be necessary to use a scan tool cycle/bleed these brakes, can anyone help me please. Ive changed calipers etc before, never had this issue on other vehicles.


#2

Depending on the year of your Jimmy, it may require a scan tool to bleed the brakes.

Tester


#3

[quote=“daphniesman04, post:1, topic:94066, full:true”]Someone said I could have the wrong caliper on the wrong side? Is that even possible? [/quote]It certainly is, and if it is done, the bleeder will be below the brake line and it will be impossible to bleed all the air out of the calipers.


#4

I failed to mention, sorry, its a 1999. I looked at it again, the bleeder is on the top just above banjo nut, etc. I find it hard to believe that I could bolt the wrong one in place so easily. But idk. The parts store store said I could return them if I wanted too. Not sure what to do.next.


#5

I think @Tester is correct (gee, what a surprise!). You likely need a scan tool to cycle the ABS to bleed the brakes. Replacing the calipers won’t help if that’s the case.


#6

Have it towed to a shop to get it bled.


#7

So much for saving money, lol


#8

If the vehicle has ABS, the ignition switch is cycled several times to set the solenoids to their home positions in the ABS pump.

Then the brake system is pressure bled at the master cylinder using a pressure bleeder.

If at any time the brake pedal is depressed, a scan tool is required to reset the solenoids to their home positions in the ABS so the brake system can be pressure bled.

Tester


#9

Thanks tester. I’m guessing that I can’t get this tool at the auto parts store. Top rent, lol


#10

My spelling stinks tonight, sorry


#11

As long as only the calipers were replaced and no air was introduced into the ABS unit, there is no need for the scan tool to bleed the brakes on this vehicle. They can be bled using the usual methods (manual two-person, pressure, or maybe even vacuum).

If the ABS unit needed to be bled, the scan tool would be needed, but the brake system is first bled the usual way. The scan tool is then used to run a routine to bleed the ABS unit, followed by a final bleed the usual way.

What bleeding method is being used here? Have the bleeder valves been removed to make sure they and their ports in the calipers are clear?


#12

No one’s asked yet: Did you bench-bleed the calipers before installing them? If not, you can still bleed them, but it will take a long time to get anything out, which could make you think something is wrong.


#13

@Bugmenot… hello, when I replaced the calipers, I replaced the left side first. Then a week later, I replaced the right side. I took them off one side at a time. I took the brake like off at the caliper and wrapped it in shop rags. I replaced the left side brake line and mounted the caliper. Then proceeded to the right side, same process. I never tried to bleed them until both were mounted. I broke loose the bleeder valve, then snuggled it back up. Then, I topped off my plastic reservoir. I had my helper mash the pedal about midway.then I opened the valve. Helper said the pedal never dropped at all. Btw, I had key forward but not running. . . I looked and verified that the bleeder is on the top up above the brake like mounting hole on both sides.


#14

Also, I haven’t pulled the valve yet


#15

You should get clarification on that, because with empty calipers the pedal should have dropped much faster than usual…


#16

@shadowfax, hello, no I didn’t bench bleed. I honestly didn’t know yupbench bleed them. The manual didn’t mention that point.


#17

Hopefully my dad will be able come by and help me try this out. I was trying to include my daughter, and she was my helper,c she’s 13. So I’ll try again. I did notice on the right side, the brake line was leaking around the banjo bolt.


#18

Did you use new copper washers (seals) at the banjo connection? New ones usually come with new or rebuilt calipers.


#19

Yes sir sure did, but I don’t think i got it right enough


#20

I am using a line from Mr. Mountain Bike here. A vehicle that won’t start is an inconvenience.

A vehicle that won’t stop is a danger to you and everyone with or around you.

Have this thing towed to a shop and have it done properly. The repair cost will be less than the deductible you have for the damage you might cause.