ASE PS2 Test Preparation Guide: Electrical System
● BATTERY — Provides current for cranking the engine, and to supplement the electrical needs of the vehicle. Automotive 12-volt batteries are usually located in the engine compartment, but some may be mounted elsewhere (under back seat, in the trunk, behind the inner fender splash guard, etc.). Most are maintenance-free and require no make-up water
ASE PS2 Test Preparation Guide: Exhaust Parts
● MUFFLERS AND RESONATORS — Used to control exhaust noise, the muffler or resonator is mounted behind the catalytic converter. A second muffler or resonator may be located further back for additional sound control. Vehicles with dual exhausts usually have separate mufflers for each side, but some may share a common muffler. Mufflers and resonators
ASE PS2 Test Preparation Guide: Ignition System
● SPARK PLUGS — Provide a source of ignition in each cylinder of a gasoline-powered engine. High voltage from an ignition coil passes down through the spark plug’s conductive core and jumps across an electrode gap at the end of the plug to create a spark. This ignites the air/fuel mixture in the combustion chamber
ASE PS2 Test Preparation Guide: Fuel System
● FUEL PUMP — Delivers fuel from the fuel tank to the engine. Fuel injected engines usually have a tank-mounted, high-pressure electric pump. Older carbureted vehicles used an engine-mounted, low-pressure mechanical pump. Most EFI fuel pumps operate at 35 to 85 PSI or higher. Designs vary and include single- or double-vane, roller-vane, turbine or gerotor
ASE PS2 Test Preparation Guide: Engine Parts
● BEARINGS — Provide support for the crankshaft and camshaft. A thin film of oil between the bearings and shafts reduce friction and prevent wear. Most late model original equipment engine bearings are aluminum, or aluminum with a steel backing. Older engines typically use tri-metal (babbit and copper/lead over steel) rod and main bearings. Worn
ASE PS2 Test Preparation Guide: Brakes
● DISC BRAKES — Use a pair of friction pads to squeeze against a flat disc or rotor when the brakes are applied. Most cars and light trucks since the early 1970s have front disc brakes, and many have rear disc brakes also. Disc brakes provide more stopping power than drum brakes, better cooling and
ASE PS2 Test Preparation Guide: Automatic Transmission/Transaxle
● AUTOMATIC TRANSMISSION — A transmission that shifts itself using engine RPM, load and other inputs to regulate shift points and gear engagement. Late model automatics have electronic/hydraulic controls operated by the Powertrain Control Module (PCM) or its own Transmission Control Module (TCM). Most late model automatics have five or six gears (speeds), though some
Car Brake Rotors: Resurface or Replace?
Like brake pads, brake rotors don’t last forever. The rotors wear every time the brakes are applied. The rate at which rotors wear depends on a lot of variables: the type of brake pads on the car, the metallurgy (hardness and quality) of the castings, how efficiently the rotors cool themselves, the type of driving
19th Annual Technical Forum: CV Halfshafts
Is it easier to replace a worn constant velocity joint, or to replace the entire halfshaft?
Selling: It’s Time To Ask The Right Question
At Essential Action Design Group, we have logged more than 2,000 observations of face-to-face sales calls made by aftermarket outside sales people in the automotive, fleet and PBE channels.