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Front brake caliper thread: M8x1.25 bleed nipple size: 9x32.5mm

Rear brake caliper thread: M7x1 bleed nipple size: 7x30.5mm

Spray the bleed nipple with penetrating oil and let it soak overnight and then try to release bleed nipple with Muttertång - Biltema and if that doesn't help add heat.
 

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Scrub with wire brush, spray rust penetrant and then try to tighten slightly before undoing. Works more often that not. I have always used channellock nutbusters for rounded off parts, they grip tighter and tighter as you turn. They are about £18 online and will get plenty of use if you like tinkering.
 

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Discussion Starter #6
Just wanted to update bought a nutcrusher poly grip and that worked. fitted the nipples and bled the brakes, it took 2.5 liters of brake fluid before there was no air left. gave it x3 times 5 pumps to make sure when there was no air left. 100 small to 10 big to tiny tiny ones. i still have 50% of the pedal = nothing and the rest can lock the tires which i found out last night while testing. now i have no abs.
 
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