Replacing Mullered Nipples

[gavbrum 18 1 Cars]

Get a blow torch on them after soaking them in penetrating fluid.

 

If the calliper is off the car then lock the bleed nipple in the vice as you heat the area of the calliper with the thread. Then gently unscrew by turning the calliper.

This technique has worked perfectly every time for me.

 

Worked even when there was hardly anything of the bleed nipple left.

[Tom Fenton 1,540]

Whilst the Irwin bolt extractors are great, I'd personally not use them on rounded off nipples. The torque that you can apply to get a stubborn bolt/nipple to budge can be big. I doubt a nipple would handle it and just shear off.

 

I have to agree with this. The problem with the alloy calipers is not that you cannot grip the hexagon, the problem is getting the nipple out without shearing it off due to the steel nipple being corroded into the alloy body.

[MiniGibbo 142]

I plan to do it on the car btw.

[allye 530 3 Cars]

Stainless nipples FTW!

[cRaig 273 1 Cars]

Doesnt stainless still react with alloy?

[Toddy 7]

Doesnt stainless still react with alloy?

 

Yes, I use a light coating of Duralac

 

http://www.llewellyn-ryland.co.uk/downloads/duralac.pdf

[Ryan 99]

Stainless reacts with alloy as badly as steel does. Use brass nipples for alloy calipers.