How do you compress rear caliper piston on 06 VWpassat?

Answer 1

Turn piston with channel lock (slip joint) pliers anti-clockwise whilst applying light pressure to the piston (with 2 people it is easier)

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I'd be real careful using a channel lock on the caliper. For one person, on my 2002, I purchased a universal caliper kit from Harbor Freight ($30). The tool is perfect for the job. I also purchase the one man brake bleeding kit ($5).

To do the job:

1. Loosen rear wheel lugs (don't remove them yet) while tire is still on the ground (19mm).

2. Jack up one wheel at a time (leave parking brake OFF)

3. Remove the lugs now, and take off the tire.

4. There are 2 13mm bolts that hold the caliper assembly to the wheel. Note on the top one the orientation of the metal bracket that holds the plug for the wear sensor - you will need to know which way to orient it when you reassemble. You will need a 15mm open end wrench to hold the "nut" that will otherwise spin when you remove the 13mm bolts.

5. The brake caliper can now be pulled toward the back of the car and will come off the disk. The emergency brake cable and brake pad sensor wire will still be attached. DO NOT remove the emergency brake cable (no need to).

6. I cut the brake sensor wire near the worn pad. This makes it easier to remove the wire and disconnect the plug from the old pad. Gently slide one or both of the plug assembly from the medal bracket (I only removed the one on the pad side). With a small flat screw driver you need to depress the plastic tab on the plug, and pull to remove the old plug.

Now you are ready to install the new pads

1. Take the tool you purchased from Harbor freight and assemble it with the #5 fitting that is the same size as the eurovan rear caliper piston.

2. Put the tool into the caliper; screw the outer fitting back toward the plate that will serve to push against the outer part of the caliper (opposite of the piston).

3. Screw the assembly until it is snug, and then stop.

4. Open the 11mm bleed valve on the caliper (I hooked up the bleeder to capture the brake fluid that will otherwise get all over). Also, open the top to the brake reservoir (make sure the reservoir is full).

5. Now you should be very easily able to screw the tool that opens (screws in) the caliper piston. Screw it all the way in; you will need all of the room to get the new pads in.

6. Tighten the bleed screw, remove the bleed kit.

7. Put the new pads on the car, guide the sensor wire thru the opening on the back (relative to car) of the caliper (note, there is a small flexible cover that you can either take off or flex open to get the wire thru). Put the caliper in place over the new pads and line up the holes on the caliper with the holes on the wheel assembly. Make sure you put the sensor wire bracket back on before you put the 13mm bolt back in the top hole.

8. Insert and tighten the bolts. Make sure the bleed valve is tight. Put the cover back on the reservoir.

9. Put the wheel back on and tighten the lugs.

10. Repeat on the other side of the car.

Answer 2

You will need a rear brake caliper tool kit. These calipers do not press in. They turn in like tightening a screw. you will notice 2 notchs in the caliper piston this is where the tool head fits in.

Stop!!!!!!!!!!!!! Do not try to screw back these calipers else you will break them. Im guessing the 06 passat of yours has the motorised HB!!!? if so you need a computer to plug in to ecu then tell it to release the locking pin 1st on the caliper which then allows you to turn em back has normal....

Failing to do this will 99.0% break them and

Answer 3

Remove the cap from the brake reservoir under the hood (careful, that stuff wrecks paint), and use a C-clamp with the old pad to distribute weight.