2018 Ram 4000 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

16 Coolant / Antifreeze parts are listed for the 2018 Ram 4000, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PEAK, PRESTONE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.

The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 6 options from PRESTONE, ACDELCO, VALVOLINE and 2 other brands — built to original-equipment specification. ACDELCO 105027 is listed in this group.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

2 Coolant Reservoir parts for the 2018 Ram 4000 come from 2 brands — DORMAN and GPD.

This group includes DORMAN 603571 and GPD 2411130.

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

MOTORAD supplies both parts for the 2018 Ram 4000.

The Locking Replacement section lists 1 option from MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. MOTORAD ST16 is listed in this group.

The Standard Replacement section: 1 option from MOTORAD. MOTORAD T16 is listed in this group.

Listed part numbers: MOTORAD ST16 and MOTORAD T16.

This table covers the petcocks used to drain the radiator. Read more

This group shows a single part: DORMAN 61134.

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 2018 Ram 4000 come from 3 brands — DORMAN, GPD and VDO / CONTINENTAL.

Listed part numbers: DORMAN 620057, GPD 2812305 and VDO / CONTINENTAL FA71871.

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

3 Radiator Fan Clutch parts are listed for the 2018 Ram 4000, from FOUR SEASONS, FVP and HAYDEN.

This group includes FOUR SEASONS 46088, FVP 9202440 and HAYDEN 2906.

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

One part is listed for the 2018 Ram 4000 — GPD 1712493.

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

16 Thermostat parts for the 2018 Ram 4000 come from 2 brands — MOTORAD and CALORSTAT. The "Popular" part is MOTORAD 7416203.

Heavy Duty: 3 parts, from MOTORAD. A representative part number is MOTORAD 5416203.

The Performance section lists 3 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2416160 is listed in this group.

Premium: 2 parts, from MOTORAD. A representative part number is MOTORAD 7416203.

Standard Replacement: 8 parts, from MOTORAD and CALORSTAT. A representative part number is MOTORAD 416203.

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

2 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2018 Ram 4000, from FEL-PRO and MAHLE / CLEVITE.

This group includes FEL-PRO 35857 and MAHLE / CLEVITE C31788.

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

5 Thermostat Housing / Water Outlet parts for the 2018 Ram 4000 come from 3 brands — DORMAN, MOTORAD and SKP. The "Popular" part is MOTORAD CH7689.

The Economy section: 3 options from DORMAN and SKP. DORMAN 902689 is listed in this group.

Standard Replacement: 2 parts, from MOTORAD. A representative part number is MOTORAD CH7689.

This group includes MOTORAD CH7689, DORMAN 902689 and DORMAN 902315 and the remaining 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

2 Water Pump parts for the 2018 Ram 4000 come from 2 brands — FVP and US MOTOR WORKS.

Listed part numbers: FVP US6341, plus the other parts above.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

4 Water Pump Gasket parts are listed for the 2018 Ram 4000, from AJUSA, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: AJUSA 01704700, FEL-PRO 36071 and MAHLE / CLEVITE K32612, plus the other parts above.