tuterz

iTrader: (11)

I was putting in my bbk today and stripped the hole where the oil feeds into the calipers. At first I thought it was the bolt but then I pulled it back out the hole inside was stripped out. What can I do to fix it? Any thoughts? I hope I dont have to buy another caliper.

Harold57

I believe that there is a product called "Form a thread" (or something like that) on the market. I used it about 20 years ago on the bolts that held on my wheel covers and never had a problem with them. However, the brake lines are under pressure when in use, so I don't know if this product is appropriate for the application. Is there an insert that will fit?

tuterz

iTrader: (11)

i think i will try to take it to a machine shop to get it rethreaded.. hopefully it will help..

scyul

Tuterz,

You will have to get the hole re-drilled and tapped oversize, and have a slimsert (or an Heli-coil) installed... This procedure requires special tooling and is widely use on aircrafts... Assuming the seal between the hose and the caliper is done with a copper washer (like regular calipers), this should work.

Did you strip it by over tightening, or is it a manufacturing defect? If it's a defect, I would request a replacement... 'cause I assume that these aren't cheap!

BUT DON'T USE ANY KIND OF PUTTY!!! It will definitely not work!

tuterz

iTrader: (11)

I stripped it by over tightening it. I'm bringing it to a shop tm so they can take a look at it. It was the very last step and I was done too. SMH. I was pretty sad about it.

scyul

This is what a slimsert looks like...

http://alcoafastener.thomasnet.com/v...tric-oversize?

And I found Heli-coil repair kits on Amazon...


Not sure about your thread size though.

Good luck tomorrow...

sebtown

A new caliper, on line is less than $100. if it were my life behind the brake pedal I would beg, borrow or steal the $100.

scyul

Sebtown, You missed the part where Tuterz says its a caliper from a "bbk" (Big Brake Kit)....
Not $100 to replace...

gripau1

The heli coil may fail due to the high pressure brake fluid. I would take it to a machine shop and let them repair it - if possible.

tuterz

iTrader: (11)

I took it to a machine shop. They are gonna retread it for me. I'm picking it up this afternoon. Hopefully it will be fixed.

scyul

Helicoils are designed to withstand correct torque value, and are widely used to repair stripped treads in aircraft components.

Typical brake line pressures during a stop range from less than 800psi under "normal" conditions, to as much as 2000psi in a maximum effort. Aircraft hydraulic systems operate at 3000 PSI... Just so you know.

tuterz

iTrader: (11)

so i got my brakes back today.. works perfectly great! .. fixed for 25 bucks! .. yay! got a new pic up in the progress thread!

scyul

Cool!