2026 Ford F-650 Cooling System Parts

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

PRESTONE supplies the 4 Coolant / Antifreeze parts for the 2026 Ford F-650. All of them fit every engine offered in the 2026 F-650.

Part numbers include PRESTONE AFC10000, PRESTONE AFC12100 and PRESTONE 115CEL, among others listed above.

This table covers the hard pipes and extra hoses in the coolant circuit. Read more

MOTORCRAFT supplies the 5 Coolant Hose / Pipe parts for the 2026 Ford F-650. 1 part fits every engine; the other 4 are engine-specific.

Listed part numbers: MOTORCRAFT KM8086, MOTORCRAFT KM5365 and MOTORCRAFT KM8091, plus the other parts above.

This table covers the seals at the Coolant Hose / Pipe. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: MAHLE / CLEVITE C33846.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

2 Coolant Reservoir Cap parts for the 2026 Ford F-650 come from 2 brands — GATES and MOTORCRAFT.

Listed part numbers: GATES 31406 and MOTORCRAFT RS527.

This table covers the seals at the Coolant Reservoir. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

One part is listed for the 2026 Ford F-650 — MOTORCRAFT RTS1084.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

One part is listed for the 2026 Ford F-650 — MOTORCRAFT INTCO12.

This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap. Read more

MOTORCRAFT supplies the 3 Radiator parts for the 2026 Ford F-650.

This group includes MOTORCRAFT RAD230, MOTORCRAFT RAD123 and MOTORCRAFT RAD122.

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

MOTORCRAFT supplies the 3 Radiator Cap parts for the 2026 Ford F-650.

Listed part numbers: MOTORCRAFT RS534, MOTORCRAFT RS533 and MOTORCRAFT RH200.

This table covers the Radiator Fan blades. Typical signs include chatter, streaks, or a skip at the top of the stroke. Confirm left and right lengths in the notes — they are often different. Read more

3 Radiator Fan Blade parts for the 2026 Ford F-650 come from MOTORCRAFT.

Part numbers include MOTORCRAFT YA265, MOTORCRAFT YA273 and MOTORCRAFT YA274.

This table covers the Radiator Fan clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

MOTORCRAFT supplies both parts for the 2026 Ford F-650.

This group includes MOTORCRAFT YB3343 and MOTORCRAFT YB3309.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

6 Radiator Hose parts for the 2026 Ford F-650 come from MOTORCRAFT.

Listed part numbers: MOTORCRAFT KM5393, MOTORCRAFT KM5362 and MOTORCRAFT KM5403, plus the other parts above.

This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender. Read more

MOTORCRAFT supplies both parts for the 2026 Ford F-650.

Part numbers include MOTORCRAFT DY1613 and MOTORCRAFT DY1488.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

5 Thermostat parts for the 2026 Ford F-650 come from 2 brands — MOTORCRAFT and GATES.

Part numbers include GATES 34240, MOTORCRAFT RT1206 and MOTORCRAFT RT1249, among others listed above.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

3 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2026 Ford F-650, from GATES, MAHLE / CLEVITE and MOTORCRAFT.

Part numbers include GATES 33671, MAHLE / CLEVITE C32601 and MOTORCRAFT RG571.

This table covers the housings and outlets the thermostat sits in. Read more

4 Thermostat Housing / Water Outlet parts for the 2026 Ford F-650 come from MOTORCRAFT.

Listed part numbers: MOTORCRAFT RH210, MOTORCRAFT RH315 and MOTORCRAFT RH240, plus the other parts above.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

4 Water Pump parts for the 2026 Ford F-650 come from MOTORCRAFT.

Part numbers include MOTORCRAFT PW504, MOTORCRAFT PW503 and MOTORCRAFT PW678, among others listed above.