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Fuel Trims And AFR Sensors

Fuel trims are a difficult topic to cover in a matter of a few pages. But this summer, an old friend and former teaching partner arrived at our local car show with the check engine light illuminated on his 2004 Holden Monaro, which was imported from...

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Preventive Maintenance Profits: Preferred Automotive, Jenkintown, PA

With the summer months heating up and cross-country road trips beginning, many people want to make sure their vehicles are prepped for the long haul. For the first-ever July edition of Maintenance Chronicles, we will focus on Preferred Automotive Specialists,...

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Toyota Charging System Diagnostics

According to my experience, I estimate that replacing the alternator solves 95% of all charging system failures. If that’s true, what happens in the remaining 5% of charging system failures that results in customer comebacks? To explore charging system...

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The Humble Mechanic Answers Your Questions

Charles is taking your automotive questions. If you have a question about a car, car repair, DIYs on your car, Volkswagen, mechanic’s tools, or anything car related, ask it up. If you have a car question for a show like this, email him [email protected]...

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The Ins And Outs Of Sanders

Sanders are required tools in today’s collision repair shop. Body techs and painters rely upon them every day to achieve that perfect finish on your customers’ vehicles. Whether you’re prepping a panel for paint or removing imperfections before...

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Are You Regularly Maintaining Your Equipment?

Technicians who are idling because the welder won’t feed wire, the hydraulic ram won’t pull chains, the booth heater won’t heat or the air compressor won’t compress enough air is a costly mistake, as labor time is the most expensive thing in any...

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Engineered Accessory Drive Serpentine Belt Replacement

You might not be able to see it, but an accessory drive belt is always both speeding up and slowing down. When a piston accelerates downward after the ignition of the fuel and air, the crankshaft speeds up and then slows down as it reaches the bottom...

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Preventive Maintenance Profits: Preferred Automotive, Jenkintown, PA

With the summer months heating up and cross-country road trips beginning, many people want to make sure their vehicles are prepped for the long haul. For the first-ever July edition of Maintenance Chronicles, we will focus on Preferred Automotive Specialists,...

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GM HVAC Door Actuator Motors: Operation And Calibration

GM Electrically Driven Actuator Motors Long gone are the cables and rods jutting out of the firewall to operate the heater control valve or a vacuum unit pulling a blend door open. These days, it’s electrically driven actuator motors (modules) accomplishing...

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Home Brakes Tech Tip: Brake Burnishing Procedures for New Brake Pads or Shoes

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At Bendix, we highly recommend that new pads and shoes be broken in properly.

After every brake job the technician should first confirm that he has a good brake pedal by gently stroking the pedal to move the wheel cylinders and caliper pistons back out to the normal position. After confirming a good pedal, the follow burnish procedure should be used during the test drive:

30/30/30 Burnish Procedure

• Perform 30 stops from 30 miles per hour with a 30-second cooling interval between stops. These stops will be performed at a decelerating rate of 12 feet per second or less. This means that it should be a gentle easy stop.

• The 30/30/30 Burnish Procedure beds the pads and shoes into the rotor and drums. It also deposits the necessary friction transfer to the rotors and drums for optimum brake performance.

• Following this procedure also assures that your customer will have excellent brake performance from the first time he or she drives the car after brake service has been performed. You should not depend on your customer to break in the brake job. The only way to assure that it is done correctly is to incorporate it into your brake job test drive.

Remember, proper burnishing assures a long lasting, high performing, noise free brake job!

Courtesy of Bendix by Honeywell.

For more information and brake tips, visit www.bendixbrakes.com.

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Brake and Front End Staff

Brake and Front End Staff

  • LKS473

    I believe you mean “12 feet per second^2 or less”.

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