Subaru EJ25 Head Gasket Problems
Most of the EJ head gasket failures occur around the 100,000-mile mark and start as a slow oil or coolant leak.
New Oil Specifications
Many 0W16 oils have a new donut certification mark on the bottle called API SN-PLUS and SN-PLUS Resource Conserving.
Solving Intermittent Overheating
New cooling systems anticipate and influence changes in coolant temperature.
Ignition Systems
The ignition coil is a very simple and robust circuit.
Diagnosing Crankshaft Position Sensors
Modern engines need to know the position of the crankshaft and camshafts.
Electronic Throttle Body Service
On most systems, idle speed is completely controlled by the throttle plate angle.
Spark Plug Evolution
Spark plugs have changed over the years.
How Speed, Load and Slip Affect Voltages
Modern, computer-controlled charging systems found on today’s vehicles need proper test procedures – no guesswork allowed.
Valve Lifter Technology
Hydraulic lifters are precision-fit assemblies.
ECM Damage
Engineers have devised two strategies that can be called the “immune system” for the electrical system.
Voltage Drop Testing
The measurement of voltage is like the speed of the traffic.
10 Timing Belt Tips
Here are the some key installation and service tips to make your next timing belt job just a little easier.
