A precision tool that applies a specific amount of rotational force (torque) to fasteners. Prevents over-tightening (stripped threads) or under-tightening (vibration loss).
On-Board Diagnostics (Generation 2) interface that reads engine trouble codes, monitors live sensor data, and performs readiness checks via the vehicle's data port.
Steel support stands used to safely bear a vehicle's weight after lifting. Never work under a car supported only by a hydraulic jack.
Top Dead Center. The precise point in an engine's cycle where the piston reaches its highest position in the cylinder. Critical for timing belt/chain installation.
The ratio of the maximum cylinder volume to the minimum volume when the piston reaches TDC. Higher ratios increase efficiency but may require higher octane fuel.
A multi-layer steel or composite seal between the engine block and cylinder head. Contains combustion pressure, coolant, and oil passages.
The three primary wheel alignment angles. Camber (tilt inward/outward), Caster (steering pivot tilt), Toe (in/out pointing when viewed from above).
A structural suspension component that connects the wheel hub assembly to the vehicle frame. Contains bushings and ball joints for articulation.
Temporary loss of braking power due to overheated pads and rotors. Hotter pads expand slightly, reducing clamp force against the rotor.
Anti-lock Braking System control unit that modulates hydraulic pressure during hard stops to prevent wheel lockup and maintain steering control.
The vehicle's AC generator driven by the crankshaft. Converts mechanical energy to electricity to recharge the battery and power accessories while running.
An unwanted electrical path caused by multiple ground points at different potentials. Often creates buzzing audio noise or erratic sensor readings.
SAE rating indicating oil thickness. The first number (5W) = winter/low-temp flow. The second (30) = operating-temp thickness. Multi-grade oils work across temperature ranges.
Process of draining old engine coolant and refilling with fresh solution. Removes rust, scale, and degraded inhibitors that cause overheating and corrosion.
Replacing worn gear oil in the axle/differential housing. Contains limited-slip additives or friction modifiers that break down over time.
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