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ABS Bleeding
Posted: Fri Sep 17, 2004 12:18 am
by MY92
How do I tell which nipple is for the front and rear?
It's confusing?
Posted: Fri Sep 17, 2004 12:43 am
by vrg3
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
Posted: Fri Sep 17, 2004 12:45 am
by MY92
Exactly what I got.
Bleeding vertically is going to be interesting.
Cheers!
Posted: Fri Sep 17, 2004 12:50 am
by ej22t
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
Posted: Fri Sep 17, 2004 1:25 am
by vrg3
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.
Posted: Fri Sep 17, 2004 5:28 am
by ej22t
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
Posted: Fri Sep 17, 2004 5:30 am
by MY92
The nipple is on the top, so I'm assuming when u bleed it, it will come up.
Posted: Fri Sep 17, 2004 5:32 am
by vrg3
Right, but aren't all bleeders on the top? That's how you get air out.
Posted: Fri Sep 17, 2004 9:34 pm
by MY92
The nipples on the brake calipers are more like horizontal.
Posted: Fri Sep 17, 2004 9:44 pm
by mikec
But towards the top of the caliper, unless they were installed wrong.
Posted: Sun Sep 19, 2004 4:32 pm
by vrg3
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?
Posted: Mon Sep 20, 2004 1:12 am
by MY92
I'm just being a dumbass.