Hi guys I fitted 312mm brakes to my car and the metal spring on one of the calipers keeps coming off!

Whats is this spring for and is it dangerous not to have it?

Its the one shown in this pic http://www.google.co.uk/imgres?q=audi+tt+caliper+spring&um=1&hl=en&sa=N&biw=1344&bih=819&tbm=isch&tbnid=g663wr3UME-49M:&imgrefurl=http://www.tt-forum.co.uk/forum/viewtopic.php%3Ft%3D87761&docid=DKmpOecnPmZ90M&imgurl=http://www.kisolutionz.com/ttforum/Suspension/pushingup.jpg&w=427&h=637&ei=_DCgTuz8GJGZ8gOrwMXIBQ&zoom=1&iact=rc&dur=156&sig=105324849162656035070&page=2&tbnh=139&tbnw=96&start=24&ndsp=24&ved=1t:429,r:11,s:24&tx=58&ty=99

Thanks,

Chris

It's a simple tension spring to keep the caliper from cocking on the guide pins, and it also ensures the pads make light contact with the disc at all times.

If it's coming off there are several possible reasons.

1: Spring has lost it's shape and or tension

2: Spring locating lugs on caliper worn

3: Misaligned caliper to caliper frame

Thanks mate, they're new calipers so dont think the lug will be worn. It was a bad fit when it was put on so i'll try a new one.

Buy some new ones Chris, only a few quid from TPS!

Buy some new ones Chris, only a few quid from TPS!

Will do mate I wasnt sure if they sold them seperate from calipers or the carriers but i'll give them a call. Cheers!