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On calipers with three bleeder valves such as my 1981, which one gets bled when bleeding the system after a rear caliper replacement? I’ve never run across this in all my years. Advice?
Last edited by ledger35; Apr 25, 2021 at 01:24 PM.
Three?? IIRC the rear calipers have two bleeders. Bleed them both.
Doctor,
yes I have three bleeders on my AC Delco rear calipers. Never saw this before so I’m confused. One line goes into the caliper, would bleeding all three really be necessary?
Last edited by ledger35; Apr 25, 2021 at 04:15 PM.
Bled all three bleeder valves, got a good steady flow from all three when finished. I would have figured that I had to bleed the upper most valve because air stays high, who knew.
The rear calipers have two bleeder valves, one inner and one outer on the upper sides. There is a threaded plug on one lower half. Someone must have replaced the plug, with a bleeder valve.
The rear calipers have two bleeder valves, one inner and one outer on the upper sides. There is a threaded plug on one lower half. Someone must have replaced the plug, with a bleeder valve.
Yup! Only bleed the top two bleeders. The plug next to the brake line does not get cracked.
The rear calipers have two bleeder valves, one inner and one outer on the upper sides. There is a threaded plug on one lower half. Someone must have replaced the plug, with a bleeder valve.
I can't believe I never noticed that plug. I just learned something. That makes it a good day.
On the rears, bleed the inner caliper half first, then the outer.
This.
You have a pocket of air at the top of both bleeders. If you bleed the outer one first, the air will continue to be pulled from the pocket on the inner screw SLOWLY so you will be there for a LONGER time. Bleed inner screw first then outer screw to save time and fluid.
Brake Bleeder Valves
