 Bleeding Brakes, Trouble with one caliper |
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| Deusexmachina77 |
 Mar 25 2023, 10:13 AM
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#1
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Member  Group: Members Posts: 98 Joined: 30-March 22 From: Chicago Member No.: 26,426 Region Association: Upper MidWest 
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I replaced the two front calipers with rebuilt calipers. The system was drained. I bleed the brakes starting in the rear and going to the front. I've run into an issue with the driver's side front caliper.
I have fluid making it to the caliper, as the bottom has fluid coming out with no air bubbles. But when I went to the top bleeder, I only got air. It never filled up with fluid. I removed the bleeder screw to make sure it wasn't clogged. We peddled the car continuously, and only just air. This went on for a while.(IMG:style_emoticons/default/headbang.gif) There are no fluid leaks in the system. Any thoughts would be welcome. |
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| Deusexmachina77 |
Mar 25 2023, 11:50 AM
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#2
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Member Group: Members Posts: 98 Joined: 30-March 22 From: Chicago Member No.: 26,426 Region Association: Upper MidWest
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I tried for 20 min. Nothing is coming out of the top bleeder screw, and nothing is leaking. I even removed the screw. Not a drop.
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| r_towle |
Mar 25 2023, 12:35 PM
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#3
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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QUOTE(Deusexmachina77 @ Mar 25 2023, 01:50 PM)  I tried for 20 min. Nothing is coming out of the top bleeder screw, and nothing is leaking. I even removed the screw. Not a drop. sadly....push pedal to floor, tighten bleeder...then do that again and again. pumping just pushes air in an out. I use a vacuum bleeder, its easier. rich |
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| Deusexmachina77 |
Mar 29 2023, 01:28 PM
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#4
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Member Group: Members Posts: 98 Joined: 30-March 22 From: Chicago Member No.: 26,426 Region Association: Upper MidWest
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QUOTE(r_towle @ Mar 25 2023, 01:35 PM) QUOTE(Deusexmachina77 @ Mar 25 2023, 01:50 PM) I tried for 20 min. Nothing is coming out of the top bleeder screw, and nothing is leaking. I even removed the screw. Not a drop. sadly....push pedal to floor, tighten bleeder...then do that again and again. pumping just pushes air in an out. I use a vacuum bleeder, its easier. rich Which vacuum bleeder do you prefer? I tried one that hooked to my compressor, and all it did was suck a whole liter of expensive fluid out. Granted, I didn't know what I was doing but I kept waiting for air bubbles to stop. |
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| Superhawk996 |
Mar 29 2023, 07:04 PM
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#5
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914 Guru Group: Members Posts: 7,025 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(Deusexmachina77 @ Mar 29 2023, 02:28 PM) I kept waiting for air bubbles to stop. Air bubbles will not stop when using a vacuum bleed. Air will get sucked around the loose threads of the bleed nipple. It still is pulling fluid into the caliper. You just can’t gauge completion by lack of bubbles. Now do a pump & dump bleed - you should have a better pedal and then you can judge air bubbles without the vacuum on it. I frequently use the combination of vacuum bleed then manual pump and dump when bleeding brakes. |
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Posts in this topic
Deusexmachina77 Bleeding Brakes Mar 25 2023, 10:13 AM
davep If you are pushing out air, then you just have to ... Mar 25 2023, 10:19 AM
Deusexmachina77
If you are pushing out air, then you just have to... Mar 25 2023, 10:23 AM emerygt350 I use a ten year old. I open, he pushes n holds, ... Mar 25 2023, 03:42 PM 914e
I use a ten year old. I open, he pushes n holds,... Mar 26 2023, 11:05 AM 930cabman
I use a ten year old. I open, he pushes n holds... Mar 27 2023, 01:57 PM davep Yes, the correct procedure is to press pedal 2 or ... Mar 25 2023, 04:33 PM IronHillRestorations Bleeding Brakes Mar 25 2023, 05:45 PM bkrantz Pressure bleed.
Vacuum bleed.
Gravity bleed. Mar 25 2023, 08:33 PM mlindner I use davep procedure, works great. Mark Mar 26 2023, 05:22 AM technicalninja Sometimes the bleeder feed inside the caliper is c... Mar 26 2023, 09:04 AM Deusexmachina77 Don't get brake fluid on you. It's hydrosc... Mar 29 2023, 01:33 PM emerygt350 We double checked the venting this morning and did... Mar 26 2023, 02:44 PM davep THE official statement on venting clearance (post ... Mar 26 2023, 04:36 PM Deusexmachina77 Thank you, everyone, for your advice, as I will us... Mar 28 2023, 09:03 AM davep One aspect of the "pump the pedal" metho... Mar 30 2023, 02:45 PM Deusexmachina77 Finally got everything back together.
I ended up u... Apr 1 2023, 07:16 AM |
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