Nissan Tech Tip: Groaning/Grinding Noise from Front Brakes
Use this bulletin to service a 1998-2000 Quest if the vehicle’s front brakes make a loud, low-frequency groan/grind noise when stopping. The groan/grind addressed by this bulletin may occur at normal operating temperatures and is not a "creep groan." A creep groan occurs when the brakes are released slightly and the vehicle creeps forward.
Selling Services: Brake Line Repair: Tubing, Hoses and Fluid
Corroded brake lines and flare nuts have been a problem since hydraulic brakes were first installed on vehicles. Improved materials and processes have improved serviceability, but in the Northeast and Midwest where salt and other agents are used to de-ice roads, it is still a problem. Brake Tubing 101 Beginning in the 1930s, the Bundy
Brake Myths: ABS/ESC & Replacement Brake Pads
At most shops, the person ordering brake pads is given the choice of a several levels of brake pads. The good, better and best marketing is sorted out by price and brand rather than solid engineering data. Sometimes the tech has no choice when the choice is dictated by a supply relationship for friction materials.
Brake Booster: Service Fundamentals
Disc brakes are not “self-energizing” like drum brakes, so they require more pedal effort to apply. It’s the magic of power brakes that allows a 98-lb. little old lady to bring two tons of a you name it luxury sedan to a screeching halt with little more than a light caress of her foot against
Cross-Examining: Selling Brake Jobs
Cross-Examining Service Adviser: “May I help you?” Customer: “Yes, I need to get a brake job.” Service Adviser: “OK, sign here and we’ll get right to it.” The technician pulls the vehicle in and finds that the pads are low. The brake job is already authorized over the front counter. The tech does the job,
Upgrading Rotors for Hard-Driving Fleets
Police cars, ambulances, taxis, parcel delivery trucks and even pizza delivery vehicles can chew up brake pads and rotors almost as fast as any race car. Hard use combined with frequent, sudden stops makes the brakes run hot, and when brake temperatures shoot up, the life of the pads and rotors plummets. For every increase
Hyundai: From Ball Joints to Brakes…
Uncovering Needed Repairs With Undercar Inspections The brake and suspension systems on Hyundai’s popular line of cars and SUVs are both undercar systems where problems can be detected during routine maintenance. From loose ball joints to worn-out brakes, it’s all there to be checked while the vehicle is on the rack for service and, oftentimes,
Service Guide: F-Series New Model 2004
A bold new look and some subtle changes probably best describe the 2004-and-up Ford F150. To the technician, it is the subtle changes that he or she needs to be aware of. Starting with the 2004 model year, Ford launched a new body style for the F150. The new body style truck is a new
Selling Services: Bleeding ABS Brakes after Component Replacement
Bleeding the brakes after brake components have been replaced is a step you don’t want to skip if you want a firm brake pedal. Air trapped in the lines, calipers or wheel cylinders will make the pedal feel soft and spongy. Air is compressible, so when the brakes are applied any air bubbles in the
Engineering: What Goes Up, Must Come Down!
Validating that the vehicle brake system is capable of getting the vehicle down a mountain is one of the major tests that occurs during the development and “prove-out” of the vehicle. In most cases, the manufacturer or the brake system supplier will test the vehicle on the road. This is also where a lot of
Doing the ‘Complete’ Brake Job
Brake work continues to be a solid service opportunity for independent repair shops because brakes are items that inevitably wear out. Disc brake pads need to be replaced, and the rotors usually need to be turned or replaced. The front brakes do the most of the braking, so they receive most of the attention when
Rotor Runout: Cause and Correction
The vehicle owner may say that under light braking the vehicle pulses to a stop or under heavy braking the vehicle shudders. Technical service bulletins (TSBs) often describe these symptoms as a “judder.” There are only two causes for judder — lateral runout and disc thickness variation on the rotor’s friction surface. What could have