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Old 03-03-2021, 08:38 AM
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E53's can be surprisingly difficult to bleed. You may need all three:

INPA method to get air out of ABS module
Pressure bleeder attached to reservoir
two-man pedal pumping bleed

A combo of the last two - pump/hold pedal while an assistant opens closes bleeder screw WHILE the pressure bleeder is attached to reservoir is quite effective.

Last edited by Effduration; 03-03-2021 at 01:52 PM.
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Old 03-03-2021, 11:17 AM
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Quote:
Originally Posted by Effduration View Post
E53's can be surprisingly difficult to bleed. You made need all three

INPA method to get air out of ABS module
Pressure bleeder attached to reservoir
two-man pedal pumping bleed

A combo of the last two - pump/hold pedal while an assistant opens closes bleeder screw WHILE the pressure bleeder is attached to reservoir is quite effective.
+1 ^
The trick is to pressurize the brake system to 20psi, crack open the RR caliper bleeder screw, bleed until zero bubbles (can take 10 mins), activate the ABS MODULE, press on the brakes 5x, continue to bleed to flow out the air that was trapped in the ABS block, repeat the ABS and manual brake activation until everything is clear and free of bubbles.
Move to LR, RF and then LF. Road test
Rebleed and you should be good to go.
Air seems to like being trapped in the RR and RF channels for some unknown reason.
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Last edited by StephenVA; 03-03-2021 at 11:25 AM.
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