I hate my IS300

Concrete · 31 Mar 2013 at 12:18

Sooo, changed the slide pins, bushes, caliper and flushed the brake fluid . . and the nearside brake is still sticking . .

. . any ideas? Because its close to being scrapped now (tax due tomorrow, can't be bothered with it anymore).

The Running Man · 31 Mar 2013 at 12:22

Take it to a garage?

Concrete · 31 Mar 2013 at 12:28

I've been using the Lexus process for fixing brakes, the next (and final) step is master cylinder, for a cool £2k. The car isn't worth that much and I can't understand why it would only effect one brake if it was that which was failing.

viper_2003 · 31 Mar 2013 at 12:28

Sounds like a take it to bits and put it back together problem, disk off, caliper mount off and reseat everything?

rodenal · 31 Mar 2013 at 13:40

Is it a new caliper or a refurbished / scrap one? Check the piston for pitting, assume you checked the hoses for any damage too whilst you were changing? I do t really see how a master cylinder fault can lead to a sticking caliper (in the traditional sense at least) - underactive I can understand though

Concrete · 31 Mar 2013 at 14:19

It was a refurbished caliper from Pagid. The hose looked fine so I don't think its that.

Going to take vipers advice and pull the whole thing apart tomorrow morning for one last check.

Fantom · 31 Mar 2013 at 14:20

are the pads a tight fit? it may be worth grinding a bit from the sides to allow it to move slowly?

If the yolk is even slightly bent it could cause the pad to jam up, impossible to tell without seeing it, is there a clip to secure the pads to their positions in the caliper, check these are working.

Copper grease is your friend!

Zack101 · 31 Mar 2013 at 16:51

It won't be the master cylinder.

Could be the brake hose, they can look fine on the outside but the insides deteriorate and partially block up. The pressure from the master cylinder being high push's the fluid through, but there is no pressure to push it back so it stays in the caliper.

The easy test for this is to slacken off the bleed nipple. If the caliper then frees off then that is the problem.

gary0006 · 31 Mar 2013 at 18:01

Sounds like a hose is being pinched.

Concrete · 2 Apr 2013 at 12:58

Thanks for all the help guys, took it all apart again yesterday and *think* I have found the cause of the problem. The rear pad's bottom clip was badly corroded (probably due to the heat build up as the pad is pretty new) and wasn't allowing the pad to freely move backwards. Cleaned it up and put loads of copperease on it and it seems much happier now, hopefully it stays that way!