1999 Accord new brakes, break in time? How?
Ok I have put new rotors and pads all the way around on my 99 3.0 Vtec. I paid for decent parts. The slide pins moved well, everything seems good.
How do I break in the pads/rotors? Like what do I do in the first drives of the car?
How do I break in the pads/rotors? Like what do I do in the first drives of the car?
My understanding is that you need to deposit some new pad material into the metal rotor. To do that you want to get the whole assembly nice and hot and then do some hard braking, and then don't stop, so you don't get an extra thick spot.
So, four times decelerate from 60 to 40.
Then decelerate, nearly as hard as you can from 60 to 5, but don't stop.
Then stay at 30 or 60 or whatever, but don't stop until things cool, 10 minutes maybe..
All speeds in MPH.
So, four times decelerate from 60 to 40.
Then decelerate, nearly as hard as you can from 60 to 5, but don't stop.
Then stay at 30 or 60 or whatever, but don't stop until things cool, 10 minutes maybe..
All speeds in MPH.
Originally Posted by Centric
The procedures are very similar between manufacturers. With respect to the pads, the bonding resins must be burned off relatively slowly to avoid both fade and uneven deposits. The procedure is several stops of increasing severity with a brief cooling period between them. After the last stop, the system should be allowed to cool to ambient temperature. Typically, a series of ten increasingly hard stops from 60mph to 5 mph with normal acceleration in between should get the job done for a high performance street pad. During pad or disc break-in, do not come to a complete stop, so plan where and when you do this procedure with care and concern for yourself and the safety of others.
If you come to a complete stop before the break-in process is completed there is the chance for non-uniform pad material transfer or pad imprinting to take place and the results will be what the whole process is trying to avoid. Game over.In terms of stop severity, an ABS active stop would typically be around 0.9 G’s and above, depending on the vehicle.What you want to do is stop at a rate around 0.7to 0.9 G's. That is a deceleration rate near but below lock up or ABS intervention. You should begin to smell pads at the 5th to 7th stop and the smell should diminish before the last stop. A powdery gray area will become visible on the edge of the pad (actually the edge of the friction material in contact with the disc- not the backing plate) where the paint and resins of thepad are burning off. When the gray area on the edges of the pads are about 1/8" deep, the pad is bedded
If you come to a complete stop before the break-in process is completed there is the chance for non-uniform pad material transfer or pad imprinting to take place and the results will be what the whole process is trying to avoid. Game over.In terms of stop severity, an ABS active stop would typically be around 0.9 G’s and above, depending on the vehicle.What you want to do is stop at a rate around 0.7to 0.9 G's. That is a deceleration rate near but below lock up or ABS intervention. You should begin to smell pads at the 5th to 7th stop and the smell should diminish before the last stop. A powdery gray area will become visible on the edge of the pad (actually the edge of the friction material in contact with the disc- not the backing plate) where the paint and resins of thepad are burning off. When the gray area on the edges of the pads are about 1/8" deep, the pad is bedded
Find somewhere you can do this safely. Empty section of straight freeway is always a good spot, don't do this braking in the passing lane nor the 'truck' lane. Do not stop during the procedure as this can cause a hard spot(not fixable) on the rotors. When you ave accomplished the bed in, drive for another ~15-20mins at speed to allow the rotors/pads to properly cool down. Then you can stop the car without worry of causing a hard spot.
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