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<h2>What is a fan clutch in the car?</h2>A&nbsp;fan clutch is a quietly efficient and essential player within the cooling system of the vehicle. Positioned between your car's engine and the radiator fan, its primary task is to manage the fan's speed to control engine temperature effectively.When the engine begins to heat up due to the demands of driving or environmental conditions, the fan clutch senses this temperature rise. It responds by engaging and allowing the radiator fan to spin at a faster rate. This action pulls in more air through the radiator, performing a crucial role in cooling down the engine.&nbsp;Now, when the engine cools down, perhaps during highway cruising or after shutting off the vehicle, the fan clutch disengages. This reduces the fan's speed or stops it altogether, which conserves engine power and contributes to improved fuel efficiency.<h2>Bad fan clutch symptoms</h2>Notice a few things&nbsp;to check if your fan clutch gets lazy or sick:<ul><li>Overheating: If your car gets too hot, especially in traffic, the fan clutch may not be cooling the engine properly.</li><li>Loud noise: A noisy fan when it's not supposed to be could mean the fan clutch is acting up.</li><li>AC weakness: If your AC isn't as cool as usual, blame the fan clutch for reduced airflow.</li><li>Temperature fluctuations: Unusual temperature gauge swings can indicate a problematic fan clutch.</li><li>Leaks or damage: Fluid leaks or physical damage on the fan clutch are bad signs.</li><li>Traffic heat: If your car overheats in traffic but cools down on the open road, the fan clutch might be slacking.</li><li>Easy fan spin: Fan blades that spin too easily suggest a lazy fan clutch.</li></ul><h2>Fan clutch replacement</h2>If you're experiencing issues with your car's fan clutch, it might be time for a replacement. Keep in mind that this job can be a bit tricky, so it's usually best left to a professional mechanic. However, if you're a seasoned DIY enthusiast and have the necessary tools, here's a general idea of how it's done:<ol><li>Ensure safety: Park on level ground with the engine off.</li><li>Drain coolant (if needed): Place a drain pan, open the radiator drain valve, and collect coolant.</li><li>Remove fan shroud: Use tools to detach the shroud if required.</li><li>Loosen fan clutch nut: Use a holding tool or wrench to loosen the nut counterclockwise.</li><li>Take out the fan and clutch assembly: Carefully remove it from the engine.</li><li>Install the new fan clutch: Hand-tighten the nut, then torque it to the manufacturer's specs.</li><li>Reattach the fan shroud: Secure it with bolts or clips.</li><li>Refill coolant (if drained): Top off the radiator with fresh coolant.</li><li>Test it: Start the engine and ensure the new fan clutch is working correctly, maintaining a normal engine temperature.</li></ol>

Fan Clutch

Air Cleaner

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Air Filter Box

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Air Flow Sensor

Air Intake Duct

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Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Air Intake Resonator

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

Intake Manifold Repair Bracket

Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Radiator

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Radiator Control Fan Module

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Radiator Core Support Skid Bar Plate

Radiator Fan Cooling Motor

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Radiator Hose

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Engine Cooling

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

2018 Toyota 4Runner Fan Clutch

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