Guides

Wondering how a cooling fan switch works? Learn about the bimetallic sensing mechanism, relay wiring, and why setpoints vary by application.

Learn what a rear view mirror is, how to adjust it properly, the types available, and U.S. safety standards in this practical guide.

Turn your car into a smart vehicle — learn how a universal remote start works and whether it’s right for your ride.

What is a radiator fan shroud and why does your engine need one? Learn how shrouds focus airflow, when they’re essential, and proper mounting spacing.

Learn what a power steering reservoir is, where it’s located, how it works, and how to check fluid levels safely in this practical guide.

A radiator fan pulls air through your vehicle’s radiator to cool the engine when you’re idling or moving too slowly for natural airflow to do the job. For the full breakdown, see our best Universal Radiator Fan guide. When you’re cruising down the highway, your car’s forward motion shoves plenty of air through the radiator

Learn how to install a universal motorcycle exhaust the right way — loose-fit everything, align, tighten front to rear, then leak-check at idle.

Learn how to use an oil filter wrench correctly: counterclockwise torque, the right fit, and the common mistakes that turn an oil change into a fight.

What Does the Oil Catch Can Do? Traps oil vapor to protect your direct-injection or turbo engine’s intake from deposits.

Wondering what does the oil cooler do? Learn how this heat exchanger protects your engine, the two main types, and how it differs from your radiator.