Dang air in my brakes

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pooperscooper
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Dang air in my brakes

Post by pooperscooper » Thu Feb 25, 2016 2:22 pm

So I accidentally completely emptied the brake fluid reservoir and now there seems to be air on the whole system, even though I did tap air off all the brakes.

Any ideas?
1992 Subaru Legacy Sedan (DD)
1996 Subaru Impreza (Redneck Rally Machine)

MConte05
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Re: Dang air in my brakes

Post by MConte05 » Thu Feb 25, 2016 6:47 pm

Bench bleed the MC to get it out. The subie MC is angled up slightly, so if the reservoir is emptied, it'll be impossible to get all the air out without taking the MC off the car.

pooperscooper
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Re: Dang air in my brakes

Post by pooperscooper » Thu Feb 25, 2016 8:22 pm

aw man. I'll do that.

Thank you!
1992 Subaru Legacy Sedan (DD)
1996 Subaru Impreza (Redneck Rally Machine)

Legacy777
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Re: Dang air in my brakes

Post by Legacy777 » Wed Mar 02, 2016 6:52 pm

I wouldn't recommend bench bleeding, it's so difficult to do with these that even if you get the air out on the bench you're going to make a huge mess and introduce air while trying to hook up the brake lines to the MC.

To MConte05's point, if that's a concern just jack the rear of the car higher so air isn't trapped. However, I have never done this and have had bone dry MC's a few times. I recommend bleeding as normal, and then bleed with the engine running so you have the added pressure of the vacuum assist.

My normal bleeding procedure is to slowly pump the brake pedal around 10-15 times, hold on the last pedal, then have a helper open the bleeder, and close it when the pedal is on the floor. Repeat this process several times per wheel in the factory bleeding order. I usually will do this first without the engine running and then do it one or two times with the engine running.

You may need to bleed one more time after driving the car a bit if the brakes feel spongy. However the above method has worked for me every time on multiple cars.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

pooperscooper
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Re: Dang air in my brakes

Post by pooperscooper » Wed Mar 02, 2016 7:08 pm

Thanks for the tips.

I've already gone through and bled the brakes on every poont multiple times, always with the car running though.

Also I have no Idea what the factory bleed order is.
1992 Subaru Legacy Sedan (DD)
1996 Subaru Impreza (Redneck Rally Machine)

cj91legss
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Re: Dang air in my brakes

Post by cj91legss » Sat Mar 05, 2016 3:22 pm

The order is right rear, left rear, right front, left front

basically furthest to nearest the master cylinder.

This is for non ABS systems, I think there's bleed screws on the abs pumps.
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Re: Dang air in my brakes

Post by dankberries » Sat Mar 05, 2016 4:34 pm

Check out speed bleeders for ease of bleeding the brakes by yourself. Awesome investment.
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cj91legss
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Re: Dang air in my brakes

Post by cj91legss » Sat Mar 05, 2016 4:38 pm

That's a good point!

To add to that I bought a pneumatic bleeder from harbor freight. It hooks up to the caliper. You put the provided bottle upside down in the master cylinder and squeeze the trigger at each caliper. Pretty slick and only takes about half an hour for all 4 corners.
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT

cj91legss
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Re: Dang air in my brakes

Post by cj91legss » Sat Mar 05, 2016 4:41 pm

Here's the link

http://www.harborfreight.com/brake-flui ... 92924.html

It just hooks up to an air compressor
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT

Legacy777
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Re: Dang air in my brakes

Post by Legacy777 » Sun Mar 06, 2016 12:58 am

cj91legss wrote:The order is right rear, left rear, right front, left front

basically furthest to nearest the master cylinder.

This is for non ABS systems, I think there's bleed screws on the abs pumps.

CJ,

The FSM order is RF, LR, LF, RR.

The big thing is you bleed each circuit together. Since the brake system uses a diagonal brake system the RF & LR are tied together and same goes for the LF & RR. So if you do the furthest first, you should do RR, LF, LR, RF.

I've always followed FSM order.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

cj91legss
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Re: Dang air in my brakes

Post by cj91legss » Sun Mar 06, 2016 2:49 pm

Well shit... I did it all wrong lol.

OP Ignore me, I gave false information!!
Legacy777 wrote:
cj91legss wrote:The order is right rear, left rear, right front, left front

basically furthest to nearest the master cylinder.

This is for non ABS systems, I think there's bleed screws on the abs pumps.

CJ,

The FSM order is RF, LR, LF, RR.

The big thing is you bleed each circuit together. Since the brake system uses a diagonal brake system the RF & LR are tied together and same goes for the LF & RR. So if you do the furthest first, you should do RR, LF, LR, RF.

I've always followed FSM order.
Now I've got some garage work to do because that might answer a concern I have had lately.
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT

pooperscooper
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Re: Dang air in my brakes

Post by pooperscooper » Sun Mar 06, 2016 2:55 pm

Haha, thanks all of you for the help. Gotta love this forum :)

I will test the factory bleeding order in a few days and we shall see if the air goes away
1992 Subaru Legacy Sedan (DD)
1996 Subaru Impreza (Redneck Rally Machine)

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