P38 Rear Pad replacement

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J

Jamiehol

Active Member
Posts
244
Got to do the first bit of DIY on my P38 this weekend as the rear pads are in dire need of replacment.

Is there anything i need to be specifically aware of ? I've replaced pads on a number of cars before.

I have got the following as a basic approach to it, is there anything I have missed or to be aware of.

1, Jack up rear under diff casing with trolley jack
2, Axle stands under rear axle casing, near wheels,
3, Wheels off.
4, Remove calipers & wind back pistons.
5, Clean up carriers and calipers, drop pads in.
6, Bolt everythign back up and put wheels on.
 
Jamiehol said:
Got to do the first bit of DIY on my P38 this weekend as the rear pads are in dire need of replacment.

Is there anything i need to be specifically aware of ? I've replaced pads on a number of cars before.

I have got the following as a basic approach to it, is there anything I have missed or to be aware of.

1, Jack up rear under diff casing with trolley jack
2, Axle stands under rear axle casing, near wheels,
3, Wheels off.
4, Remove calipers & wind back pistons.
5, Clean up carriers and calipers, drop pads in.
6, Bolt everythign back up and put wheels on.
Click to expand...

copper slip on the back of the pads.
 
Jamiehol said:
Got to do the first bit of DIY on my P38 this weekend as the rear pads are in dire need of replacment.

Is there anything i need to be specifically aware of ? I've replaced pads on a number of cars before.

I have got the following as a basic approach to it, is there anything I have missed or to be aware of.

1, Jack up rear under diff casing with trolley jack
2, Axle stands under rear axle casing, near wheels,
3, Wheels off.
4, Remove calipers & wind back pistons.
5, Clean up carriers and calipers, drop pads in.
6, Bolt everythign back up and put wheels on.
Click to expand...

Don't forget to chock front wheels if your on anything but level ground. Even if you are on level ground do it anyway. Pretty easy just two 12mm bolts and the pads are yours.
 
Jamiehol said:
Got to do the first bit of DIY on my P38 this weekend as the rear pads are in dire need of replacment.

Is there anything i need to be specifically aware of ? I've replaced pads on a number of cars before.

I have got the following as a basic approach to it, is there anything I have missed or to be aware of.

1, Jack up rear under diff casing with trolley jack
2, Axle stands under rear axle casing, near wheels,
3, Wheels off.
4, Remove calipers & wind back pistons.
5, Clean up carriers and calipers, drop pads in.
6, Bolt everythign back up and put wheels on.
Click to expand...



WARNING

you have to bleed the pressure of the ABS system before starting anything on the brakes as per RAVE


DEPRESSURISE SYSTEM
WARNING: Before bleeding the system or
working on any component in the brake
system the following procedure MUST be
carried out to depressurise the accumulator.
1. Switch off ignition.
2. Operate the brake pedal 30 times. Pedal travel
will increase slightly and reduced resistance will
be felt as pressure decreases.
3. Wait for 60 seconds, press the brake pedal four
more times. This procedure will ensure that all pressure is evacuated from the system.
 
big-al-cove said:
WARNING

you have to bleed the pressure of the ABS system before starting anything on the brakes as per RAVE


DEPRESSURISE SYSTEM
WARNING: Before bleeding the system or
working on any component in the brake
system the following procedure MUST be
carried out to depressurise the accumulator.
1. Switch off ignition.
2. Operate the brake pedal 30 times. Pedal travel
will increase slightly and reduced resistance will
be felt as pressure decreases.
3. Wait for 60 seconds, press the brake pedal four
more times. This procedure will ensure that all pressure is evacuated from the system.
Click to expand...

Oops, never did that when I changed mine. Didn't have any problems tho!

Surely that is only if you're disconnecting brake pipes etc though isn't it?
 
big-al-cove said:
WARNING

you have to bleed the pressure of the ABS system before starting anything on the brakes as per RAVE


DEPRESSURISE SYSTEM
WARNING: Before bleeding the system or
working on any component in the brake
system the following procedure MUST be
carried out to depressurise the accumulator.
1. Switch off ignition.
2. Operate the brake pedal 30 times. Pedal travel
will increase slightly and reduced resistance will
be felt as pressure decreases.
3. Wait for 60 seconds, press the brake pedal four
more times. This procedure will ensure that all pressure is evacuated from the system.
Click to expand...

No need to do this if your simply changing pads, of course if you inadvertantly press the brake pedal it will push the piston out, but it's hard to inadvertantly press the brake pedal from the back of the vehicle.
 
wammers said:
No need to do this if your simply changing pads, of course if you inadvertantly press the brake pedal it will push the piston out, but it's hard to inadvertantly press the brake pedal from the back of the vehicle.
Click to expand...


if your changing pads the piston will be to far out of the caliper to fit the new ones, so you will have to push the piston back into the caliper thus putting pressure on the accumilator this is the reason there is a clear warning in RAVE
 
big-al-cove said:
if your changing pads the piston will be to far out of the caliper to fit the new ones, so you will have to push the piston back into the caliper thus putting pressure on the accumilator this is the reason there is a clear warning in RAVE
Click to expand...

No pressure is put on accumulator pushing pistons back in. Pressure is fed from accumulator to caliper pistons on pressing pedal, fluid returns to fluid tank when brakes are released. It does not go back to accumulator, it is then drawn from tank into accumulator when pump is running until working pressure is reached. If accumulator is charged and you disconnect a brake pipe there is a chance of injury from high pressure fluid if the pedal is inadvertanly pressed. That is the reason for the warning. Simples.
 
wammers said:
No pressure is put on accumulator pushing pistons back in. Pressure is fed from accumulator to caliper pistons on pressing pedal, fluid returns to fluid tank when brakes are released. It does not go back to accumulator, it is then drawn from tank into accumulator when pump is running until working pressure is reached. If accumulator is charged and you disconnect a brake pipe there is a chance of injury from high pressure fluid if the pedal is inadvertanly pressed. That is the reason for the warning. Simples.
Click to expand...


so why is there clear instructions in RAVE telling you to depressure the system before working on any component of the braking system, i would have thought that this would include changing the pads as well as this is part of the system
 
big-al-cove said:
so why is there clear instructions in RAVE telling you to depressure the system before working on any component of the braking system, i would have thought that this would include changing the pads as well as this is part of the system
Click to expand...


what about brake lights, do i need to evacuate the pressure for that?
 
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