[200q20v] Furbishing for the Glen
pjrose at frontiernet.net
Sun Aug 19 19:01:22 EDT 2001
Only a week to go! I installed new rear calipers, rotors and pads the
other night. The nice surprise was that none of the fasteners had
been overly torqued/corroded/etc. The carrier mounting bolts came
loose nicely and even the brake hose(s) loosened with no problems.
Both rotors were slightly (0.5 to 1.0 mm) under the "minimum"
thickness; the pads were worn by about 2/3, but one of them had
cracked across its center--right down to the backing plate. The
rubber boots were all intact but the guide pins were very dry on the
driver's side where someone had had left the boots detached at one
end. The guide pins cleaned up nicely and worked easily after
applying gobs of high-temp brake grease. Once again my home-brewed
pressure bleeder made bleeding a snap.
The e-brakes' release "action" is clearly stronger now, but not yet
completely up to the job. There is definitely some "excessive"
resistance from both cables. The fact that they were almost never
used for the past 15 months was no help on that score. However the
new calipers can produce enough restoring force to get each cable to
within about 1/8" of full release. I was suprised to find that the
cables could be induced to fully retract by a mere gentle flexing of
the cable housings by hand (no need to hammer directly on the lever
or use a large screwdriver as with the old calipers.) With some use
it's possible the cables might loosen enough to work without any
"help"; otherwise I'll replace 'em.
I also found that the e-brake needed some adjustment (slackening)
since the cables could be fully released on one side or the other but
not both sides at the same time. I was able to slacken the ebrake
cable tension by taking a couple of turns on the adjustment nut-- a
**deep** 10mm socket, universal joint and 9" ratchet-drive extension
were needed. I used a 3/8" drive, but 1/4" would be easier. That's
another bit of maintenance that Audi designers must have stayed up
nights figuring how to get as awkward as possible, although now that
I've done it, it's not as hard as I imagined it would be.
Phil Rose Rochester, NY
'91 200q mailto:pjrose at frontiernet.net
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