System
Cooling System
Moves coolant through the block and heads to the radiator to carry heat away.
Components in this system
5 documented so far
- RadiatorThe wide finned heat exchanger at the front that cools the engine's coolant.
- Water PumpBelt-driven pump that keeps coolant circulating through the engine.
- Thermostat & HousingTemperature-controlled valve that holds coolant in the engine until it warms up.
- Coolant ReservoirThe translucent tank where you check the coolant level.
- Cooling Fan & ShroudPulls air through the radiator when the truck is not moving fast enough to do it alone.
Lines and hoses in this system
Upper radiator hose
Thermostat housing → Radiator upper tank
Carries hot coolant out of the engine to the radiator.
Lower radiator hose
Radiator lower tank → Water pump inlet
Returns cooled coolant to the pump.
Heater hose — supply
Engine coolant outlet → Heater core inlet at the firewall
Sends hot coolant to the heater core for cabin heat.
Heater hose — return
Heater core outlet → Water pump or engine return
Returns coolant from the heater core.
Reservoir / overflow hose
Coolant reservoir → Radiator or engine
Lets coolant expand and return as temperature changes.
Torque records for this system
- Water pump boltsVerification Required
- Thermostat housing boltsVerification Required
- Radiator bracket boltsVerification Required
Symptoms that can point here
Every documented part
- Battery
- Starter
- Alternator
- Air Filter & Air Box
- Mass Air Flow (MAF) Sensor
- Air Intake Tube
- Throttle Body
- Upper Intake Manifold
- Fuel Rail
- Fuel Injectors
- Ignition Coil
- Spark Plugs
- Radiator
- Water Pump
- Thermostat & Housing
- Coolant Reservoir
- Cooling Fan & Shroud
- Serpentine Belt
- Belt Tensioner
- Power Steering Pump
- A/C Compressor
- A/C Condenser
- Brake Booster
- Brake Master Cylinder & Reservoir
- Engine (4.2L Essex V6)
- Transmission
- Steering Gearbox
- PCM (Powertrain Control Module)
- Engine Compartment Fuse Box
- Oil Pan
- Valve Covers
System descriptions explain how these parts work together mechanically. They are general information, not a substitute for verified service data for your exact 2007 F-150 configuration.