Heating / Cooling Archives - Page 131 of 149 - UnderhoodService
Tech Tip: Drivetrain Noises and Wheel Bearing Replacement

One of the toughest challenges we face as import specialist techs is noise complaints. These aren’t necessarily difficult from the technical or nuts and bolts perspective as much as from the diagnostic process.

Tech Tip: Wintertime Heater Operation Guidelines

Wintertime heater operation presents numerous questions and problems. Here are some guidelines for professional technicians to ensure the heating efficiency of their customers’ vehicles when the weather turns cold. Verify coolant level and condition. If the system is low, the heater core is the first to lose coolant flow, causing a lack of heat in the passenger compartment. Old coolant can cause ….

Servicing Solutions: 15 Tips on Servicing Ford F-150s

A bold new look and some subtle changes probably best describe the 2004-and-up Ford F-150. To the technician, it is the subtle changes that he or she needs to be aware of. Beginning with the 2004 model year, Ford launched a new body style for the F-150. It is a new vehicle inside and out.

Rotor Runout Check List

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

Steering Position and Yaw

Driving skills and Electronic Stability Control One of the first things a novice driver asks is: “Do I turn into the skid or away from it?” With Electronic Stability Control, this decision is made for us. When a vehicle begins to skid during a cornering maneuver, the skilled driver steers into the direction of the

Understanding Steering Quality

And Delivering a Good Driving Experience to Customers

Hyundai: Drivetrain Noises & Wheel Bearing Replacement

One of the toughest challenges we face as import specialist techs is noise complaints. These aren’t necessarily difficult from the technical or nuts and bolts perspective as much as from the diagnostic process. The first challenge is to pin down the noise that has the customer concerned. We’ve all listened to our customers struggle with

Tech Tip: Kia Sedona Transaxle Range Switch Out of Adjustment

Some owners of 2002-’05 Sedonas may complain of MIL Illumination related to the transaxle range switch being out of adjustment. On vehicles that exhibit this condition, a transaxle range switch that’s out of adjustment may cause the following conditions ….

Cooling System Antifreeze Requirements

When a customer brings you a vehicle that needs a coolant change, what kind of coolant should you use? The type of coolant specified by the vehicle manufacturer? A universal or “all makes, all models” type of coolant? Or should you run the old coolant through a recycling machine and put it back in the

Fluid Service: Avoiding the Wallet Flush

Avoiding the Wallet Flush By Gary Goms Contributing Editor Many shops are recovering revenues lost to a shrinking repair market by “upselling” fluid maintenance services or, as they’re commonly called in the aftermarket, “fluid flushes.” In other words, adding a fluid flush to a money-losing routine oil change can boost a shop’s average repair order

Diagnosing Wheel Speed Sensors

Wheel speed sensors (WSS) provide essential wheel speed information not only for anti-lock brake systems (ABS), but also for traction control and stability control systems. Some vehicles even compare the wheel speed sensor readings against the vehicle speed sensor (VSS) to make sure all of these sensors are accurate and working correctly. In some situations,

Tech Tip: Kia Sportage HVAC Mode Cotrol Switch Breakage

This bulletin provides information related to the 2001 model year Sportage HVAC Mode Control Switch. On 2001 model year vehicles produced before June 29, 2000, an internal switch contact may break off. When this occurs, airflow selections cannot be made. To correct this condition, the internal switch contact has been revised to eliminate breakage ….