XK / XKR ( X150 ) 2006 - 2014

Brake job questions

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Old Apr 18, 2021 | 09:01 AM
  #1  
Typhoon320i's Avatar
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Default Brake job questions

2007 XK
I'm about to do my rear pads and rotors. Never done it before.
There are some things I'm reading, and just want to ask if other owners agree with the following-

The service manual says, when doing a brake job:

1. replace the anti-rattle spring with new. Should you really not reuse?

2. It says remove "the brake caliper mounting plate" What is that? the picture shows removing the caliper mounting bracket from the knuckle. The manual seems to call that part the "caliper carrier" somewhere else? So what is the "brake caliper mounting plate" It says to discard the two bolts, and replace. You shouldn't reuse?

3. It seems to be saying remove the brake hose from the caliper (not sure it it is just describing how to take the whole system apart or is necessary because the hose position has no wiggle room?) then replace the 2 washers on the hose with new.

4. Disconnect parking brake cable. I've also read on the forum to disconnect the battery beforehand for the parking brake calibration.?

Can anyone clarify what the manual says or share there own experience?

-Thanks
 
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Old Apr 18, 2021 | 12:41 PM
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Service manuals always say to reuse bolts. It's the official way of doing this. I never do, and haven't had an issue.

You technically don't need to remove the brake hoses from the calipers, but I found it necessary on both to be able to get the piston to wind back. Even with the master cylinder uncapped, etc.

Once you remove the brake hoses, you should probably bleed the system as it is likely you introduced air.
 
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Old Apr 18, 2021 | 01:43 PM
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Here's a good recent thread on brakes.
https://www.jaguarforums.com/forum/x...cement-136031/
 
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Old Apr 18, 2021 | 03:22 PM
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1. As long as the spring will provide tension, no need to replace it.
2. Think those are all the same item, just different terminology. No reason to not reuse the bolts.
3. No need to remove the brake hose, just use some wire to hang the caliper from some part of the suspension without stressing the hose. Didn’t have any issue rewinding the piston with the hose attached.
4. Not sure about the parking brake, as I haven’t replaced the rotors on my ‘07, just pads.
 
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Old Apr 18, 2021 | 03:34 PM
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Calibrate the electric park brake using Jaguar approved diagnostic equipment. If Jaguar approved diagnostic equipment is not available disconnect the battery for approximatly 30 seconds , the vehicle will then prompt the driver to carry out the calibration procedure as per the vehicle hand book on re-connection.



Parking Brake Calibration

The parking brake system must be calibrated whenever the battery has been disconnected or has been in a state of discharge, or repairs have been carried out to the rear service or parking brake system.

NOTE:

If new rear brake pads have been installed, pressure must be applied to the brake pedal a minimum of five times prior to calibration of the parking brake system.

To calibrate the parking brake system:
1 . Place gear selector lever in 'P' Park position.

2 . Release parking brake cable tension to service position. Parking Brake Cable Tension Release

3 . Set the ignition status to 'ON'.
4 . Apply and hold the footbrake then pull up the parking brake switch.

5 . To release the parking brake, apply and hold the footbrake then release and press down the parking brake switch.
 
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Old Apr 18, 2021 | 05:20 PM
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Originally Posted by kj07xk
1. As long as the spring will provide tension, no need to replace it.
2. Think those are all the same item, just different terminology. No reason to not reuse the bolts.
3. No need to remove the brake hose, just use some wire to hang the caliper from some part of the suspension without stressing the hose. Didn’t have any issue rewinding the piston with the hose attached.
4. Not sure about the parking brake, as I haven’t replaced the rotors on my ‘07, just pads.
I agree with #1 and #3 above. I did not need to open the brake fluid bleed screws to get the pistons to wind back. It seems the piston winding is a mechanical adjustment which does not displace brake fluid significantly. Make sure you have the proper tool to rewind the rear caliper pistons into the calipers. Post #3 has a link to another thread which shows one example of the tool. It is not necessary to get a toolkit which has two tools for counter clockwise and clockwise choices to rewind the pistons; it is sufficient to get the one tool which turns clockwise to rewind.
Regarding #2, I bought new bolts from a Jaguar dealer; however I agree the old bolts could be reused. The new bolts were very difficult to install with hand tools including use of a cheater bar - as I could not use my electric impact wrench on them.
Regarding #4, I had replaced rear brake pads and discs a week ago. There is no need to remove the parking brake cable. Yes, disconnect the 12V battery to force recalibration of the parking brake adjustment when the battery is reconnected.
 

Last edited by Patrick Wong; Apr 18, 2021 at 05:33 PM.
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Old Apr 18, 2021 | 11:08 PM
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Since I have a 5.0L and a different service manual I checked out your version, seems same as when I did my brakes. The Caliper Carrier and Mounting Plate are the same, not cool that they change their nomenclature in the middle of the process. It is very simple, you have a base rotor held by 2 screws, then a Caliper Carrier (a.k.a. mounting plate) with 2 bolts, then a Caliper held to the Carrier (mount) with 2 guide pins. Three components in sequence.
 
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Old Apr 19, 2021 | 08:47 PM
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Would be great if someone could do a short video of this. It sounds pretty simple, I've done it on other cars but never this one, and it seems there are always one or two quirks to know about each car's brake job procedure that it really helps to know.
 
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