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

Tech Tip: Cool Fix for a Ford Diesel A Ford truck, SUV or van owner may complain of a crank/no-start condition, lack of power and coolant leak. Some vehicles equipped with a 6.0L diesel engine may exhibit those symptoms, along with oil in the coolant. The coolant leak creates a low coolant condition, which may cause the engine to overheat or result in no cabin heat. More

Tech Tip: Diagnosing Ford F-250 Engine Miss A 1999 Ford F-250 5.4L has an engine miss and the Check Engine light is on with code P0304 in its memory. Check for coolant dripping onto the #4 coil (passenger side rear cylinder) from the hose fitting directly above it. If coolant has dripped onto the coil, tighten the clamp and replace the coil, as it is almost always damaged by the coolant leak. More

Second Generation Repairs: Servicing the GM 3800 Series II Engine The GM 3800 Series II engine, introduced in 1995, is quite a different engine from its predecessor, the Series I engine. While the stroke for the 3.8L engine remained at 3.4" (86 mm), and the bore remained at 3.8" (97 mm), the engine architecture changed dramatically. More