Every vehicle has at least five cooling-system hoses. Some have six. All must remain intact; otherwise, an engine will lose coolant and overheat. Every vehicle has an upper radiator hose that transfers hot coolant from…

Vehicles that are equipped with electric cooling fans have switches that sense the temperature of the coolant and turn the fan on when the tem­perature reaches a preset level. If this does not happen, coolant…

Most vehicles are equipped with a conventional shock absorber at each corner or with a MacPherson strut shock absorber in each front corner and a conventional shock absorber in each rear corner. Read More

A cooling-system thermostat that sticks in a closed or partially closed po­sition, preventing hot coolant from flowing through the radiator, will cause engine temperature to rise. If the thermostat sticks in the fully closed position,…

Cables act as highways through which electricity flows to the spark plugs. In time, they can fail. When they do, voltage needed by spark plugs to ig­nite the fuel mixture won't reach the plugs, resulting…

Most engines manufactured since the 1960s have a positive crankcase ventilation (PCV) system, which prevents hydrocarbon vapors in the crankcase from escaping into and polluting the atmosphere. The central component of this system is the…