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| Thread ID: 115880 | 2011-02-07 20:53:00 | Bedding in Brake Rotors & Pads ... | SKT174 (1319) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1176136 | 2011-02-07 20:53:00 | Just had my front brake rotors & pads changed. Mechanic told me NOT to brake hard until the pads beds in. However, I also get this info online, in fact, almost everyone online says use the below method to bed in the pads # From 60mph, gently apply the brakes a couple of times to bring them up to operating temperature. This prevents you from thermally shocking the rotors and pads in the next steps. # Make eight to ten near-stops from 60mph to about 10-15 mph. Do it HARD by pressing the brakes firmly, but do not lock the wheels or engage ABS. At the end of each slowdown, immediately accelerate back to 60mph and then apply the brakes again. DO NOT COME TO A COMPLETE STOP! If you stop completely and sit with your foot on the brake pedal, you will imprint pad material onto the hot rotors, which could lead to vibration and uneven braking. # The brakes may begin to fade after the 7th or 8th near-stop. This fade will stabilize, but not completely go away until the brakes have fully cooled. A strong smell from the brakes, and even some smoke, is normal. # After the last near-stop, accelerate back up to speed and cruise for a while, using the brakes as little as possible. The brakes need only a few minutes to cool down. Try not to become trapped in traffic or come to a complete stop while the brakes are still very hot. Very confused here, any suggestions? |
SKT174 (1319) | ||
| 1176137 | 2011-02-07 22:21:00 | When I changed my front pads and rotors recently I was told by the mechanics to bed them in in the way you have outlined and have noticed no ill effects from it, infact it seemed to make a huge difference to the performance of the brakes in regards to pre bedding and post bedding braking feel and response. | lagbort (5041) | ||
| 1176138 | 2011-02-07 23:43:00 | Been a mechanic for 40 years and never heard of customers bedding in brakes. | prefect (6291) | ||
| 1176139 | 2011-02-08 00:31:00 | Ruins them for future hard applications when you need them the most. You just hit the high spots and make them brittle or start surface cracks that make the rotors useless next brake-job time. Don't do it. This is a leftover technique from the days of internally expanding show/drum brakes and poor shop practices. |
SurferJoe46 (51) | ||
| 1176140 | 2011-02-08 00:32:00 | Been a mechanic for 40 years and never heard of customers bedding in brakes. So ... who does the bedding then .. ? |
SKT174 (1319) | ||
| 1176141 | 2011-02-08 00:47:00 | Common sense says just drive and brake normally. Normal use will progressively wear off high spots from rotors and pads. In the good old days of Vincent drum brakes, I'd take the drums off a number of times after fitting new linings, and carefully file off lining high spots until the linings were contacting fairly fully. Edit: Of course, my definition of normal use may be quite different from that of the young hoons :) |
Terry Porritt (14) | ||
| 1176142 | 2011-02-08 08:34:00 | The brakes should have been bedded in by the mechanic that fitted them before you get the car back. They do have to be bedded in. The whole process only takes 10 minutes while roadtesting | Phil B (648) | ||
| 1176143 | 2011-02-08 08:39:00 | Read bendix.co.nz Scroll down the bottom for bedding in info |
Phil B (648) | ||
| 1176144 | 2011-02-08 09:09:00 | I dont think its a biggy, maybe the term bedding in is a bit grandiose. After you fit new pads, rotors,shoes, drums wheel cylinders etc you would always go for a test drive. Applying the brakes a few times this should prune off the high spots calling it bedding in or pruning off the high spots it does not matter. I got myself in the guano once after replacing brake shoes in a XA coon they dont have any adjusters you can turn they automatically adjust applying the brakes in reverse. Well I know that now but not when I went to stop for cars on the road and I didnt stop the pedal went all the way to the floor luckily some cars went around me. Second brake failure was at an intersection in a Hillman Hunterstang went sailing through with the pedal to the floor they only had a single master cylinder and the brake booster had failed and the vacuum in the manifold had sucked all the brake fluid out. Third was in a heavily loaded Ford Tragic going down to Piha the brakes just gave up pedal went soft but when it cooled down it was fine I guess the brake fluid had boiled. |
prefect (6291) | ||
| 1176145 | 2011-02-08 09:19:00 | I found by bedding in the brakes, they were less susceptible to brake judder & they were less likely to grab just before stopping. I'm talking disc brakes. Drums are something else. I can remember quite a few times having no brakes because the drums had heated up & expanded. Early cars without discs, just drums, they were cars you had to think about what you were doing & what's gonna happen if you don't, when driving | Phil B (648) | ||
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