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Old 04-06-2019, 06:24 PM   #1 (permalink)
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Issue Bleeding Brakes (Wilwood dual piston)

I'm using the Toyota power brake setup on my 94 4runner, 22re.

Running one ton axles, and while the brakes worked ok previously, after finishing my four link project on the front, I can't get the front brakes to bleed.

The rear brakes did fine. I can loosen every fitting from the master cylinder to the caliper and I get fluid when the brake pedal is depressed. When I open the bleeders on the caliper and the brake pedal is depressed, nothing. What gives?

Tried each side about 15 min each with no success.
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Old 04-06-2019, 07:17 PM   #2 (permalink)
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Pull the brake lines off the calipers as well as the bleeder vents...Use a paper clip and make sure all the ports are drilled.

I changed a slave cylinder one time and it turned out the bleeder hole hadn't been drilled out.
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Old 04-06-2019, 08:24 PM   #3 (permalink)
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Thanks, but the brakes have been on the truck since '02 and previously bled a hand full of times. That's why I'm scratching my head about this time.
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Old 04-07-2019, 06:08 AM   #4 (permalink)
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Failed master?
Why were the brakes open?
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Old 04-07-2019, 06:08 AM   #5 (permalink)
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Failed master?
Why were the brakes open?
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Old 04-07-2019, 08:41 AM   #6 (permalink)
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Stupid question but the blenders are on top of the the calipers right? My buddy had his on wrong one time and couldn't figure out why they wouldn't bleed all the air out
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Old 04-07-2019, 07:58 PM   #7 (permalink)
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So, got frustrated and pulled the bleeders out all the way and looked right on top of the piston. Told my wife to slowly push the pedal and hold it down. Brake fluid drizzled out and I put the bleeder in and fastened it down - repeated on the other side. Brakes work fine. ???
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Old 04-07-2019, 08:19 PM   #8 (permalink)
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Old 04-08-2019, 07:35 AM   #9 (permalink)
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The inline wilwood masters have to be bench bled for whatever reason. I usually just make up some brake lines that run from the ports back into the resivior. Then just pump the pedal a bunch to get the fluid to start moving. Immediately reconnect the brake lines and bleed as usual. If it runs dry you will probably have to bench bleed it again.

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Old 04-08-2019, 11:59 AM   #10 (permalink)
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If you can bleed them by removing the bleeders, oozing fluid out, and then put the bleeders back, and that works, but loosening up the bleeders gets you nothing, the bleeders themselves are bad (plugged). Probably got rust or something in them over the years. I've had it happen on multiple different vehicles, I assume it's why Toyota put those little covers on their bleeders from the factory.

Last edited by [email protected]; 04-08-2019 at 04:00 PM.
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Old 04-08-2019, 09:01 PM   #11 (permalink)
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Quote:
Originally Posted by dfowlkes View Post
Stupid question but the blenders are on top of the the calipers right? My buddy had his on wrong one time and couldn't figure out why they wouldn't bleed all the air out
That really is not a stupid question. It does happen. Not very often, buy we get some fucking yards around here.
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