| |
Hi all,
Finally got my host problems solved - missed not being on the list for the past
few days!
Anyway, I just wanted to share my experience with replacing my brake pads (did
the front a few weeks ago, and the rear last night). ...I always like it when
people write about doing a particular maintenance procedure or upgrade that I'm
thinking about doing, so I'll do the same...
A few weeks ago: I upgraded the front rotors on my '95 GLX to the Velocity
slotted rotors, and Ferodo pads. I had 62k miles on the stock pads (including
a few autocrosses), and the brake-pad wear indicator FINALLY came on. Pretty
straightforward installation, following the Bentley's manual, and European
Car's procedure from a long time ago on "Project GLX".
My problems: Velocity did not have the Ferodo's for the GLX in stock, but they
did have the exact same pads for an Audi. The only difference: The plug for
the pad-wear sensor is shaped differently. I cut the plugs off the new pads,
and soldered on the plugs from the old pads, and everything worked fine.
Second problem: I read on the list a while back about how easy it is to
mutilate the rotor retaining screw when trying to get it out. It IS indeed
soft metal. I followed the advice that I got from the list, and used a
handheld impact driver to get the screws out. (Of course, I first tried using
a regular screwdriver, and nearly stripped the screw.) The impact driver
worked great, though.
Third problem: I wanted to "save" the front rotors, in case I ever needed to
use them again - they weren't in that bad a shape. But the suckers just would
NOT come off the hub! (They obviously don't use antiseize at the factory.)
So, I finally gave in, took the hammer, and WHACKED it all the way around.
THEN they came off. Got a lot of dents in the old rotors - guess I'll make a
clock out of them or something.
Installation was a snap. Used plenty of antiseize between the rotor and hub,
so it won't be so hard to get off next time!
FYI: I never knew how the brake pad wear sensors work, until I got the old
pads out. Basically, there's just two wires that go into the pad, and they're
electrically connected with some sort of powder-like substance in the pad. As
long as this connection is made, the wear-sensor light in the dash stays off.
When the pad gets worn down near the limit, the power-like substance wears
away, the connection is broken, and the light comes on. Viola!
Last night: Installation of rear brake pads. I wanted to upgrade to the
slotted rear rotors as well, but Velocity's machinist is apparently in the
hospital, and they won't have any rotors for a while! ..Plus, they were out of
the Ferodo's. They recommended Pagid pads as almost as good, and said on the
rear, it really wouldn't make a difference. OK, I bought them. I still
planned to replace the rear wheel bearings, and have the rotors turned, but I
got lazy. I just replaced the pads, and that's all. (I figure the bearings
should last through this set of pads, and then I'll replace 'em. Plus, the
rear rotors looked pretty good - if the new pads wear quicker b/c I didn't have
the rotors turned, the cost will be offset by the fact that I didn't have to
spend more time and money having them turned...)
Problem: According to Bentley's, when retracting the rear caliper piston, you
have to turn it clockwise as you push it in. I know there's a tool that'll do
this. But it's like $60, I think. According to EC, they used a c-clamp, and
as the clamp turned, it turned the piston. Great! So, I planned to use a
brake-pad-piston retractor tool that had a fixed (not floating) end on it,
thinking it would work like a c-clamp. It didn't. Once it got tight up
against the piston, it wouldn't go any further, and the piston didn't rotate.
My (crude) solution: I tightened up the retractor, then used a pair of
lock-jaw pliers "lightly" clamped around the piston to turn it about half a
turn. Tighten up the retractor, and turn the piston some more, and so on. I
noticed that I really didn't even need pressure on the piston - merely rotating
it caused it to retract. So, it took a lot of care and a few extra minutes,
but it worked!
Results so far: The car stops, so I'm happy. I haven't wailed on the brakes
yet, but it stops as well as it did new, and the brakes don't squeek at all.
So far, the front pads are not as dusty as stock, but I've heard stories
saying Ferodo's are quite dirty. ...Looking at my rear rotors today, I can tell
(I think) where the high spots and low spots on the rotors are - maybe I
should've had them machined. ...But, I figure in a few days, the pads will have
"fit" themselves to the rotors, and we'll be good to go!
...I didn't flush the brake fluid when I did the pads. ...I replaced it with
Super Blue a year ago, and will do it again next year... The pedal isn't soft
at all, and I won't be doing any track events until next year anyway!
Sorry for the longwinded message! Just thought I'd share.
Any questions?
Dave
anderson@msai.mea
|