Types of Spark Plugs Explained: Copper, Platinum, Iridium and Ruthenium
Learn how copper, platinum, double platinum, iridium and ruthenium spark plugs differ in electrode design, lifespan and performance, and how to pick the right type.
Systems Page 32
How engines, transmissions, brakes, suspension and electronics actually work.
Car Battery Types Explained: Lead Acid, AGM and Lithium
Learn how flooded lead acid, AGM and lithium-ion 12V car batteries differ, which vehicles suit each type, and what to know before charging an AGM battery.
What Is an Automatic Transmission and How Does It Work?
A beginner's guide to what an automatic transmission is, how it shifts gears on its own without a clutch pedal, and what each PRNDL selector position does.
Timing Chain vs Timing Belt: What It Does and How to Tell Which Your Car Has
Learn what a timing chain does, how it differs from a timing belt or cambelt, the parts that support it, and how to check which system your own car uses.
How a Car Heater Works: Heater Core, Heater Box, Controls and Coolant Explained
Learn how a car heater turns engine coolant into warm cabin air, what sits inside the heater box, how it shares parts with the AC, and where car heating began.
What Is a Car Suspension System and How Does It Work?
A plain-language look at what a car's suspension is, where it sits, how springs and dampers manage bumps, and why it shapes ride, handling, and steering.
What a Turbocharger Is and How It Works in a Car Engine
Plain-English guide to what a turbocharger is, what it does for an engine, how exhaust gas spins the turbine and compressor, and why cars use turbos.
What a Car Thermostat Is and How It Works
Learn what the thermostat in a car is, what it does for the engine, how its wax valve opens and closes, and why it matters for keeping engine temperature steady.
Starter Relay: What It Is, Where It Is, and Signs It Has Failed
Learn what a starter relay does in the starting circuit, how it differs from the solenoid, common failure symptoms, and safe basic checks before calling a shop.
Starter Solenoid Explained: What It Does and How It Differs From the Starter
Learn what the starter solenoid does, how it engages the pinion and closes the high-current circuit, and how to tell a solenoid fault from a starter motor fault.
What a Car Fuel Filter Does and Where It Is Located on Most Vehicles
Learn what a car fuel filter does, how inline and in-tank designs protect fuel injection, and where to find the filter on the frame rail, engine bay, or tank.
How a Car AC System Works: Components, Diagram, and What Each Part Does
Learn how car AC works, from compressor to evaporator, with a labeled diagram of every component and a plain explanation of how the cycle cools your cabin.
Recently viewed
Your latest 12 modifications and trims, stored in this browser.