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Tech Tip: Inspecting Your Accessory Drive System

An often overlooked, but critical system within your vehicle is the accessory drive system. In the basic configuration, this includes a pulley on an engine powered shaft, a pulley on a driven accessory and a belt. The belt, by design, is the most likely component of the drive system to actually fail. It is much more advantageous for the belt to slip or break than to break other system components. More

Tech Tip: Sealing Pipe Connections on Porsche Expansion Valve

Under certain circumstances, refrigerant loss from the area of the expansion valve pipe connections can be misdiagnosed as a defective expansion valve. As of production date October 1993, a longer bolt has been used in the installation of the A/C lines to the expansion valve. The new bolt is installed as a precaution to prevent the expansion valve from distorting, which could cause a leak at the pipe... More

Tech Tip: Shim Calms Chirping Noises in Honda Models

Some Honda owners may complain of a chirp from the lower timing belt area. The noise is most often noticed at idle, usually after the engine has warmed up. The probable cause is the idler pulley mounting surface is tilted, causing the edge of the timing belt to rub against the side of the pulser flange on the drive pulley (gear). More

Diagnostic Solutions: Conducting Non-Intrusive Cooling System Inspections

Perhaps the best way to begin when we get a cooling system overheating complaint in our service bay is by using a series of quick, non-intrusive cooling system tests that establish the basics without removing major parts. More

Tech Tip: Fixing Mitsubishi HVAC Blockage and Overflow

A Mitsubishi owner may complain of water on the front driver's side floor of the vehicle. The HVAC drain tube can become blocked by internal foam packing material or by external debris entering the front cowl area. If this occurs, the HVAC case may fill up with condensation and overflow onto the passenger's side floorboard. In some cases, it can overflow into the blower motor. More

Tech Tip: Replacing Kia Sorento Coolant Reservior

Certain Sorento vehicles may overheat due to small cracks found on the bottom of the coolant reservoir due to repetitive temperature and pressure fluctuations. The new and improved coolant tank allows some expansion and contraction found in many pressurized cooling systems. This bulletin describes the proper service procedure for identifying and replacing the coolant reservoir tank. More

Tech Feature: Eliminating the Con-'Fusion' of Servicing Ford's Mid-Size Vehicles

Nestled into the marketing space between the Focus and the Taurus/Five Hundred is the Ford Fusion. The Fusion came with a choice of four-cylinder and six-cylinder Duratec powerplants. The inline four-cylinder Duratec 23 is a 2.3L 16-valve DOHC engine. More

Tech Tip: Coolant Leak from Intake Manifold Water Outlet on Nissan Frontier and Xterra Models

Vehicle owners may complain of engine coolant under the vehicle when parked or the smell of coolant when the engine is warm. The cause may be coolant leaking between the water outlet housing and intake manifold sealing surfaces. More

Leak Detection Tools & Equipment

Having the right tools to help you find leaks can save time and effort, and reduce the risk of comebacks. This special section features some common types of leaks and what kind of equipment you can use to find them, as well as a Leak Detection Product Showcase. More

Audi Tech Tip: Faulty Hose Composition Causes Odor on 2001-2006 Models

Audi owners may complain of an odd smell from the car. It may appear as if coolant is leaking from the coolant reservoir. A pressure test on the reservoir may reveal that the hose between the coolant reservoir and the engine is weeping coolant through the hose material. More