My XM V6 ES9

[Chris570]

Update time...

The XM is coming off the road in the next few days to have a few problems looked at over the winter.

The Air con leaks, ever so slightly, will lose a charge after a month. I have a UV light.
When you switch the engine off, the alarm goes off, nice. The only way to stop it is to take the battery off (any ideas?)

I have the worst brake judder ever from the O/S/F when braking. It is on it's second new disc. it seems to warp them after about 600 miles. The first set of discs were Brembo (OEM) so when it happened the first time I changed them for Bosch and the same thing happened.... Seriously any ideas on this one????

(I'll also underseal the car and possibly look at the LPG over the winter as well)

[KP]

Replace the caliper or refurb it IMO as the refurb kits arent pricey from BrakesINT and if it sticks ever so slightly it will cause heat buildup. Can be tested dead easy after a drive by pouring water on it and comparing to the other side. Bet you get a lot more steam from the warped side

Alarm sounds like an imobiliser or earthing issue maybe.

[DHallworth]

I have the worst brake judder ever from the O/S/F when braking. It is on it's second new disc. it seems to warp them after about 600 miles. The first set of discs were Brembo (OEM) so when it happened the first time I changed them for Bosch and the same thing happened.... Seriously any ideas on this one????

I'm having this problem with one of our P38 Range Rover's at the moment. It's had two sets of front discs and pads in 4 months and again has the most awful vibration when braking again. The calipers have been refurbished before it warped the first set and they're no better.

I'm now changing the front flexi's incase there's a blockage in the pipe after clamping them off the first time. In theory if the pipe is restricted when pressing the peddle the fluid will pass but it might not come back the way easily.

David.

[Chris570]

Alarm issue resolved. (Sensors and siren unplugged)
I need to pop the wheels off and watch the handbrake operation, i've a sneaky feeling the handbrake is sticking on

[KP]

How's the venting for these front warping issues? I've seen it before where corroded stone guards lean in and the extra heat leaves one side of the disc hotter than the other.

I got round the issues with grooved and dimpled discs in a car known to warp discs for fun. That coupled with pagid pads never saw the issue return and I had gone gown the replacement flexi route. For the flexi to cause it they would have to be like a 1way valve partially acting inside them. And if it's both fronts the chances of it are pretty high...