2026 Ram 3500 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

This group shows a single part: MOPAR 68153921AA.

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

7 Coolant Hose / Pipe parts for the 2026 Ram 3500 come from MOPAR. The "Popular" part is MOPAR 68359813AA.

Part numbers include MOPAR 68359813AA, MOPAR 68359826AD and MOPAR 57009948AA, among others listed above.

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

MOPAR supplies both parts for the 2026 Ram 3500.

Listed part numbers: 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

2 Coolant Reservoir Cap parts are listed for the 2026 Ram 3500, from GATES and MOTORAD. All of them fit every engine offered in the 2026 3500.

This group includes GATES 31569 and MOTORAD T73.

This table covers the Hose clamps. Read more

4 Hose Clamp parts for the 2026 Ram 3500 come from MOPAR.

Part numbers include MOPAR 6506848AA, MOPAR 6512744AA and MOPAR 68211466AA, among others listed above.

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

2 Intercooler parts for the 2026 Ram 3500 come from 2 brands — MOPAR and TYC.

Listed part numbers: MOPAR 68534238AB and TYC 18132.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2026 Ram 3500 come from MOPAR.

Listed part numbers: 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

One part is listed for the 2026 Ram 3500 — 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 for the 2026 Ram 3500 come from 2 brands — CSF and MOPAR.

Part numbers include CSF 3936, CSF 3937 and MOPAR 68322492AA.

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 are listed for the 2026 Ram 3500, from MOPAR and SKP.

This group includes MOPAR 55056947AA, MOPAR 68359841AB and SKP SK959911.

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 for the 2026 Ram 3500 come from 2 brands — MOPAR and US MOTOR WORKS.

Listed part numbers: MOPAR 68194962AA, MOPAR 68359842AD and US MOTOR WORKS 22035, plus the other parts above.

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

4 Radiator Fan Shroud parts for the 2026 Ram 3500 come from MOPAR.

Listed part numbers: MOPAR 68194960AC, MOPAR 68359839AB and MOPAR 68359840AA, plus the other 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

5 Radiator Hose parts are listed for the 2026 Ram 3500, from GATES and MOPAR.

Listed part numbers: GATES 52106, GATES 52108 and GATES 52107, 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

MOPAR supplies both parts for the 2026 Ram 3500.

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

MOPAR supplies the 9 Radiator Seal parts for the 2026 Ram 3500. MOPAR 68362572AB carries the "Popular" badge.

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

2 Temperature Sender / Sensor parts for the 2026 Ram 3500 come from 2 brands — GPD and MOPAR.

The Economy section lists 1 option from GPD — the catalog's value-priced group. GPD 1712493 is listed in this group.

In the Standard Replacement grade, MOPAR supplies 1 part: built to original-equipment specification. A representative part number is MOPAR 5149077AB.

Listed part numbers: GPD 1712493 and 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

One part is listed for the 2026 Ram 3500 — GATES 33915.

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

One part is listed for the 2026 Ram 3500 — 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

10 Water Pump parts are listed for the 2026 Ram 3500, from US MOTOR WORKS, GMB, MOPAR and 4 other brands. SKP SK1204540 carries the "Popular" badge.

Economy: 3 parts, from US MOTOR WORKS and SKP. A representative part number is SKP SK1204540.

The Standard Replacement section: 7 options from GMB, MOPAR, GATES and 2 other brands. GATES 42271 is listed in this group.

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

This group shows a single part: MOPAR 4893149AA.