Tech Tip: Noisy Infiniti Water Pump Flange An Infiniti driver may complain of a screeching noise when the vehicle is first started in the morning. The noise dissipates once the vehicle is warmed up. This condition may occur if the water pump had recently been replaced and the fan coupling to water pump flange bolts were not torqued correctly. More

Tech Tip: Water Pump Plastic Impeller Failure Plastic impellers erode because of steam in coolant. Head gasket leaks and cracked heads allow aeration of the coolant, which develops pockets of super-heated air that destroys the impeller. More

Tech Feature: Diagnosing and Repairing Cooling System Leaks on Hyundai Models Cooling system problems will present themselves in a variety of ways, and it's important that your service writer has the skills to ask the correct questions that will help your techs make efficient repairs. More

Subaru: Coolant Comes Out of Reservoir If you encounter a vehicle that experiences coolant coming out of the coolant reservoir tank, it may be caused by the radiator cap pressure valve being stuck open by debris sucked up through the reservoir tank hose. More

Tech Tip: Sorento Coolant Reservoir Replacement Some Sorento vehicles may overheat due to small cracks found on the bottom of the coolant reservoir as a result of repetitive temperature and pressure fluctuations. More

Internal Engine Repairs: Uncovering the Culprits That Cause Head Gaskets To Fail The first symptoms of a failing head gasket are usually a slow loss of coolant with no visible leaks, engine overheating and/or a check engine light with cylinder misfire codes. Uncover the culprits and prevent comebacks by following repair procedures to the letter. More

Tech Tip: Saturn's Slight Loss of Coolant/No External Leaks Evident Some customers may comment that the low coolant light is coming on and/or the coolant level is low with no external leaks visible. More

Tech Feature: Servicing Ford's 3.0L Engine The 3.0L Duratec V6 was introduced in 1996 to replace the aging 3.8L V6 in the Ford Taurus and Mercury Sable. Unlike its conventional pushrod predecessor, the 3.0L V6 has dual overhead cams, four valves per cylinder and an aluminum block with cast-iron cylinder liners. More

Tech Feature: Cooler 'Heads' Prevail - Pouring Over GM's LT1 Engine and Reverse-Flow Technology The LT1 engine was used in a variety of General Motors models, including 1992-'96 Corvette (Y-body), 1993-'97 Camaro and Firebird (F-body), and 1994-'96 Chevy Caprice and Impala (B-body), Buick Roadmaster and Cadillac Fleetwood (D-body). More

Choosing the Right Tools for Servicing Cooling Systems Automobile cooling systems are complex systems that are getting tougher and tougher to diagnose, service and repair. This article by Mike DuBois will offer some information about choosing the right tools and equipment and the kinds of repairs they will allow you to complete. More

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