VIDEO: When Is A Clunk From The Air Conditioning Compressor Abnormal?
Some customers may complain about a clunk coming from under the hood when they are not moving or at low speeds. Some noise is normal. But, if the drive belt or tensioner are worn it can make the noise louder. Andrew Markel covers how to diagnose the drive belt system and compressor.
VIDEO: What Can A Donut Do To A Drive Belt?
Everybody loves a full-lock drift or a smoky donut, but keeping the steering at full lock can have implications for the power steering pump and belt. Andrew Markel explains how power steering fluid can become superheated and damage the pump.
VIDEO: Wide Or Narrow? What Is The Difference Between Oxygen Sensors And Wide-Band Air/Fuel Ratio Sensors?
In this video, Andrew Markel explores the difference between the two types of oxygen sensors and how the ECM sees the amount of oxygen left over after the combustion cycle. He also explains how new technology allows modern engines to see more of the fuel trim of the engine.
VIDEO: Choosing The Right Battery
Finding the right battery for the vehicle’s unique needs is vital for keeping your customers on the road. It’s extremely important that your replacement batteries meet or exceed the requirements of the Original Equipment.
VIDEO: Understanding Drive Belt Decouplers
In this video, Andrew Markel discusses a new drive belt service opportunity. Many small engines and diesel engines are coming with decoupler pulleys on the crankshaft that are a mixture between a dual mass flywheel and an alternator decoupler pulley. The pulley can reduce vibrations in the crankshaft and the drive belt system.
VIDEO: Brake Bleeder Screw Removal Methods And Strategies
On some cars and trucks, trying to crack the bleeder screw can be a gamble. Either the screw will not budge or it snaps like twig. In this video, Andrew Markel discusses six tips to make dealing with bleeder screws more productive and profitable.
VIDEO: Drive Axle Inspection, Diagnostics And Installation
Andrew Markel discusses the total repair process for axle shafts. CV and tripod joints hardly ever fail on their own. The failure of the joint or axle can be caused by a faulty mount, suspension or steering component. It is critical that the problem is solved before the new axle is installed.
VIDEO: Check Wiring Diagrams Before Probing
If an electrical issue is confusing you, Andrew Markel says it is important to reach for wiring diagrams before reaching for a probe, to prevent unnecessary damage to wires and connectors.
VIDEO: Better Bulbs For Older Cars And Shorter Days
It is that time of the year when the days grow shorter and drivers need their headlights more. Andrew Markel discusses how shops can upgrade old headlights with bulbs that help drivers to see more on the roads with better contrast.
VIDEO: Timing And Drive Belt Idler Pulley Bearing Loads
Both timing and drive belt systems use idler pulleys to tension and control the movement of the belt. If components on the timing or drive belt system are misaligned, the loads on the bearings are changed. The change in the loading of the bearing can result in damage and failure of the belt system.
VIDEO: What Does A Three-Way Catalytic Converter Reduce?
If a three-way catalytic converter is functioning properly, only nitrogen, carbon dioxide and water should be coming from the tail pipe. In this video, Andrew Markel covers the basic chemistry that is happening inside a catalytic converter.
VIDEO: Diagnosing Drivetrain Stabilization
The angles of the universal and cardan joints on a driveshaft have a limited range of motion. If the angle of the pinion, transmission or axle exceed the specifications, it can result in noise and damage to the drivetrain. Andrew Markel shows how a worn motor mount or damaged axle can result in a customer noise compliant.
