Brakes - Revision history

Christian Stauduhar: Added information about sourcing and intalling the HP2 caliper center guide pin boot.

2013-05-04T17:36:32Z

Added information about sourcing and intalling the HP2 caliper center guide pin boot.

← Older revision		Revision as of 17:36, 4 May 2013
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	===How do I change the pads in my stock brakes?===		===How do I change the pads in my stock brakes?===
	The fronts are extremely easy. [http://www.audiworld.com/tech/wheel39.shtml Morgan's writeup]. The rears are a bit more difficult, but both are DIY jobs. [http://www.audipages.com/Tech_Articles/susp_whls_brake_steer/rearbrakes.html It's for an A8, and the only difference is the shape of the spring tensioners on the pads]. On the S4 rear pads, the springs are shaped like a V and fit against the caliper (pushing the pad towards the hub) - look at the stock pads before you remove them, and it will make sense.		The fronts are extremely easy. [http://www.audiworld.com/tech/wheel39.shtml Morgan's writeup]. The rears are a bit more difficult, but both are DIY jobs. [http://www.audipages.com/Tech_Articles/susp_whls_brake_steer/rearbrakes.html It's for an A8, and the only difference is the shape of the spring tensioners on the pads]. On the S4 rear pads, the springs are shaped like a V and fit against the caliper (pushing the pad towards the hub) - look at the stock pads before you remove them, and it will make sense.

			===Where can I find the boot for the center guide pin on the HP2 Caliper?===
			NAPA Brakes makes a kit withe the boot and replacement rubber for the other two guide pins. The part number is UP 83968 and can be ordered direct from napaonline.com. The kit comes with parts for two calipers. [http://m.napaonline.com/Tablet/parts/PartDetails.aspx?Id=UBP83968_0396697918 Kit]

			===How do I install the HP2 center guide pin boot?===
			Pry the small washer off of the guide pin if it didn't come off withe the old boot.
			Place the new boot on the pin and tap into place using a socket or other tube of the appropriate size.
			If the washer is in good condition on the other side of the assembly, then leave it. Otherwise, install the large washer from the kit.
			Grease the assembly and fold the boot back over itself, then insert the pin into the socket.
			Now, starting with the easy to access portion, flip the boot over into the groove behind the washer and work your way around. A small screwdriver or similar tool may help flip the boot further around the groove. When the boot has flipped all the way into the groove there is a little 'pop' sound. You can verify that it is in place by moving the assembly through it's range of travel. You may also notice that the boot collapses a little as you extend it, due to the vacuum archived by a good seal. If you can't confirm that the boot is in place, then fold it back again and give it another go.

Nyet: Reverted edits by ChiboClitr (Talk); changed back to last version by Nyet

2008-08-27T06:44:50Z

Reverted edits by ChiboClitr (Talk); changed back to last version by Nyet

← Older revision		Revision as of 06:44, 27 August 2008
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2008-07-13T03:56:25Z

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Nyet: /* How do I cycle the ABS pump with a VAG when flushing/bleeding brake fluid? */

2007-06-21T17:57:09Z

How do I cycle the ABS pump with a VAG when flushing/bleeding brake fluid?

← Older revision		Revision as of 17:57, 21 June 2007
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	Group 002		Group 002
	[Go!]		[Go!]

			If you throw a "01486 ABS test activated" the cycle did not complete correctly, and the ABS test is still in progress. Roll the car 15-20 feet then brake hard. Then, hold the steering wheel 10 degrees from center while moving in a circle for at least 4 seconds. Do each direction seperately (right circle, left circle). Do not exceed ~39mph.

			If this does not work, you may have to physically realign the steering angle sensor back to within +/- 7.5 degrees of zero via the tie rods, then rerun the calibration procedure above.

	===How do I bleed my brakes?===		===How do I bleed my brakes?===

Pansgor: /* Do I need to upgrade my rear brakes? */

2006-10-25T18:07:38Z

Do I need to upgrade my rear brakes?

← Older revision		Revision as of 18:07, 25 October 2006
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	===Do I need to upgrade my rear brakes?===		===Do I need to upgrade my rear brakes?===
	That depends. If you just drive on the street, the OEM rears (and fronts, to be honest) are usually fine. If you upgrade only the rears, you risk moving the brake bias rearward, which is not good if you are starting with a balanced system. Most people consider upgrading the rears only after upgrading the fronts. Some people still just go for some slotted rotors in the rear and call it a day. There are many options to choose from, including Stoptech, ECS, and STaSIS for size upgrades, and there are several vendors of slotted OEM style rear rotors, such as ECS and DBA. Note that most aftermarket rear calipers DO NOT come with integrated parking brake functionality, unlike the stock S4 rear calipers. However, Stoptech offers a separate E-brake caliper, and ~~there~~ ~~are~~ ~~kits~~ to ~~allow~~ S8 rotors and~~/or~~ ~~calipers~~ to ~~be used~~ with the S4.		That depends. If you just drive on the street, the OEM rears (and fronts, to be honest) are usually fine. If you upgrade only the rears, you risk moving the brake bias rearward, which is not good if you are starting with a balanced system. Most people consider upgrading the rears only after upgrading the fronts. Some people still just go for some slotted rotors in the rear and call it a day. There are many options to choose from, including Stoptech, ECS, and STaSIS for size upgrades, and there are several vendors of slotted OEM style rear rotors, such as ECS and DBA. Note that most aftermarket rear calipers DO NOT come with integrated parking brake functionality, unlike the stock S4 rear calipers. However, Stoptech offers a separate E-brake caliper, and [[S8 rear brake upgrade \| S8 rotors and carriers]] will fit with the stock S4 rear calipers (but require some grinding/shimming).

	==References==		==References==