2026 Ram 4500 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

One part is listed for the 2026 Ram 4500 — MOPAR 68153921AA.

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

MOPAR supplies the 8 Coolant Hose / Pipe parts for the 2026 Ram 4500. MOPAR 68359813AA carries the "Popular" badge.

This group includes MOPAR 68359813AA, MOPAR 68359826AD and MOPAR 57009948AA and the remaining parts above.

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

2 Coolant Reservoir parts for the 2026 Ram 4500 come from MOPAR.

Part numbers include MOPAR 68184910AE and MOPAR 68370066AC.

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

This group shows a single part: GATES 31569.

This table covers the Hose clamps. Read more

MOPAR supplies the 7 Hose Clamp parts for the 2026 Ram 4500. MOPAR 52006750 carries the "Popular" badge. 1 part fits every engine; the other 6 are engine-specific.

This group includes MOPAR 52006750, MOPAR 32002370 and MOPAR 6033135 and the remaining parts above.

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

One part is listed for the 2026 Ram 4500 — MOPAR 68534238AB.

This table covers the Intercooler Air Hose pipes. Read more

MOPAR supplies both parts for the 2026 Ram 4500.

This group includes MOPAR 68591744AA and MOPAR 68591745AA.

This table covers the seals at the Intercooler. 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: MOPAR 68322667AD.

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

3 Radiator parts are listed for the 2026 Ram 4500, from MOPAR and CSF.

Listed part numbers: CSF 3937, MOPAR 68322493AA and MOPAR 68322492AA.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

This group shows a single part: MOPAR 68322663AB.

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

2 Radiator Fan Blade parts for the 2026 Ram 4500 come from MOPAR.

Part numbers include MOPAR 55056947AA and MOPAR 68359841AB.

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

4 Radiator Fan Clutch parts are listed for the 2026 Ram 4500, from MOPAR and US MOTOR WORKS.

This group includes MOPAR 68194962AA, MOPAR 68359842AD and US MOTOR WORKS 22035 and the remaining parts above.

This table covers the shrouds that duct air through the fan and radiator. Read more

MOPAR supplies the 4 Radiator Fan Shroud parts for the 2026 Ram 4500.

This group includes MOPAR 68194960AC, MOPAR 68359839AB and MOPAR 68359840AA and the remaining parts above.

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

8 Radiator Hose parts for the 2026 Ram 4500 come from 2 brands — MOPAR and GATES.

Listed part numbers: GATES 52106, GATES 52107 and MOPAR 68359796AF, plus the other parts above.

This table covers the Radiator Mount bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles. Read more

2 Radiator Mount Bushing parts for the 2026 Ram 4500 come from MOPAR. Every part fits both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged.

This group includes MOPAR 68050200AA and MOPAR 68451118AA.

This table covers the seals at the Radiator. 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

9 Radiator Seal parts for the 2026 Ram 4500 come from MOPAR. The "Popular" part is MOPAR 68362572AB.

This group includes MOPAR 68362572AB, MOPAR 68362573AB and MOPAR 68359232AB and the remaining 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

One part is listed for the 2026 Ram 4500 — MOPAR 5149077AB.

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

2 Thermostat parts for the 2026 Ram 4500 come from 2 brands — GATES and MOPAR.

This group includes GATES 33915 and MOPAR 68534176AA.

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

One part is listed for the 2026 Ram 4500 — MOPAR 5086740AA.

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

This group shows a single part: MOPAR 4893177AD.

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

7 Water Pump parts for the 2026 Ram 4500 come from 4 brands — MOPAR, US MOTOR WORKS, DAYCO and 1 other brand.

The Economy section lists 2 options from US MOTOR WORKS — the catalog's value-priced group. US MOTOR WORKS US8140 is listed in this group.

The High Volume / Pressure section lists 1 option from MOPAR — grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. MOPAR 68569196AB is listed in this group.

In the Standard Replacement grade, MOPAR, DAYCO and GMB supply 4 parts: built to original-equipment specification. A representative part number is DAYCO DP2165.

Listed part numbers: US MOTOR WORKS US8140, US MOTOR WORKS US99 and MOPAR 68569196AB, 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

One part is listed for the 2026 Ram 4500 — MOPAR 4893149AA.

This table covers the Water Pump housings. Read more

One part is listed for the 2026 Ram 4500 — MOPAR 68724999AB.