ABS Bleeding

MY92 · Post by **MY92** » Fri Sep 17, 2004 12:18 am

How do I tell which nipple is for the front and rear?

It's confusing?

vrg3 · Post by **vrg3** » Fri Sep 17, 2004 12:43 am

You have the Nippon ABS hydraulic unit? Looks like this?

Neither one is for the front or the rear, since it's a dual-diagonal system. One's for RF and LR, and the other's for LF and RR.

If you have the Nippon system, then this is the procedure you're supposed to follow, according to the 1992 North American factory service manual:

- Bleeder between LF and RR fittings on hydraulic unit
- Bleeder on RF caliper
- Bleeder on LR caliper
- Bleeder between RF and LR fittings on hydraulic unit
- Bleeder on LF caliper
- Bleeder on RR caliper

MY92 · Post by **MY92** » Fri Sep 17, 2004 12:45 am

Exactly what I got.

Bleeding vertically is going to be interesting.

Cheers!

ej22t · Post by **ej22t** » Fri Sep 17, 2004 12:50 am

Does the regular break bleed procedure will bleed across the ABS system?
Or you have to do it sperately?
Does the ABS bleeding nessereny?

Ben

vrg3 · Post by **vrg3** » Fri Sep 17, 2004 1:25 am

John - Vertically? Explain.

Ben - I don't know for certain. I believe that with the Nippon units like the one pictured above the procedure outlined above bleeds the entire system. With other systems that don't have bleeder valves on the hydraulic unit under the hood, I don't know what you'd do... If I were doing it I'd bleed all the calipers, go out and activate ABS, and then bleed all the calipers again.

Unless a lot of air got into the system, it shouldn't be absolutely necessary to bleed the ABS box. But, if you're changing fluid it's something you want to do because you're trying to get out the old fluid.

ej22t · Post by **ej22t** » Fri Sep 17, 2004 5:28 am

vrg3, thanks for your info, I have then same unit on my 92 turbo and I have been change the brake fluid few times but never did the ABS system once, should I just replace the whole new fluid with the ABS system? where should I fill the fluid to the ABS unit???
Please detail the procedure, thanks for help!

Ben

MY92 · Post by **MY92** » Fri Sep 17, 2004 5:30 am

The nipple is on the top, so I'm assuming when u bleed it, it will come up.

vrg3 · Post by **vrg3** » Fri Sep 17, 2004 5:32 am

Right, but aren't all bleeders on the top? That's how you get air out.

MY92 · Post by **MY92** » Fri Sep 17, 2004 9:34 pm

The nipples on the brake calipers are more like horizontal.

mikec · Post by **mikec** » Fri Sep 17, 2004 9:44 pm

But towards the top of the caliper, unless they were installed wrong.

vrg3 · Post by **vrg3** » Sun Sep 19, 2004 4:32 pm

They're angled upwards, but yes, they're at less of an angle.

Why does it matter at all, though? You're attaching a hose to the nipple, right?

MY92 · Post by **MY92** » Mon Sep 20, 2004 1:12 am

I'm just being a dumbass.

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ABS Bleeding

ABS Bleeding