Bleeding ABS drums.. any ideas or what to d. i was told to lower the car all way down in the back and let them gavity bleed? is this true. ther 92 GM

 

no 3rdgens have ABS from the factory.


if you mean you have a rear thats from a car that had ABS.... its like any other brake bleeding.


my personal pref is speed bleeders ( www.speedbleeder.com ) but the usual 2 person open/close with foot on the pedal works too... or any other "normal" method.





the only thing diffrent with ABS cars is that air can become trapped in the ABS unit. depending on the exact setup there may be extra bleeders on the ABS unit, it may be need to be reversed pressure blead, ect....


the rear brakes (disc or drum) and front calipers in a ABS equipped car are the same basic design as non ABS cars.. no diff in bleeding...

 

thank you, i have a rer end out of a 96 w/ ABs and wasn't 100% sure about how t do this, plus for future refrence on another car,

like a 92 cav. w/ ABs

 

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the abs unit usually has a diagnostic self bleeding procedure that can be activated by a scanner. It's a pretty dang neat thing.

 

in my years so far as a mechanic (5) i have never seen a ABS UNIT bleed itself... do explain... i am intrigued? (not ment to be a dick comment either) but i do need a model make and year of the car or the make of the abs unit also.

 

really?

I've done it a few times even as a lowly lube tech. With a tech 2 scanner you can access the bleeding procedure. I cant give you an exact description.

But i've done it and seen it done plenty of times. If you hold your foot on the brake pedal you'll feel it moving by itself. It's a pretty strange feeling.

The last one i remember doing it on was a 97 or so suburban.