2021 Ram 1500 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

19 Coolant / Antifreeze parts are listed for the 2021 Ram 1500, from VALVOLINE, PRESTONE, PEAK and 2 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 3 options from VALVOLINE and PRESTONE — rated for severe service. VALVOLINE ZXG051 is listed in this group.

The Premium section lists 5 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 VALVOLINE, AISIN and PEAK — built to original-equipment specification. VALVOLINE ZXEL1 is listed in this group.

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

7 Coolant Hose / Pipe parts are listed for the 2021 Ram 1500, from DORMAN, MOPAR and ULTRA-POWER. DORMAN 9365501 carries the "Popular" badge.

This group includes DORMAN 9365501, DORMAN 9365502 and DORMAN 626603 and the remaining parts above.

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

11 Coolant Reservoir parts for the 2021 Ram 1500 come from 7 brands — TECHPRO, MOPAR, GPD and 4 other brands. The "Popular" part is DORMAN 603729.

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

4 Coolant Reservoir Cap parts for the 2021 Ram 1500 come from 3 brands — MOTORAD, CALORSTAT and DORMAN.

This group includes CALORSTAT RC0144, DORMAN 54201 and MOTORAD T73 and the remaining parts above.

This table covers the adapters used to pressure-test this cooling system. Read more

4 Cooling System Tester Adapter parts are listed for the 2021 Ram 1500, from MOTORAD and GATES.

This group includes GATES 31413, MOTORAD 3128 and MOTORAD 3034 and the remaining parts above.

This table covers the Hose clamps. Read more

MOPAR supplies the 10 Hose Clamp parts for the 2021 Ram 1500. MOPAR 4592176 carries the "Popular" badge.

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

One part is listed for the 2021 Ram 1500 — MOPAR 68269544AD.

This table covers the Intercooler Air Hose pipes. Read more

MOPAR supplies both parts for the 2021 Ram 1500.

Listed part numbers: MOPAR 68269546AA and MOPAR 68269545AA.

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 68364983AA.

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

13 Radiator parts are listed for the 2021 Ram 1500, from CSF, MOPAR, TECHPRO and 5 other brands. CSF 3887 carries the "Popular" badge.

Economy: 2 parts, from TECHPRO. A representative part number is TECHPRO CH3000101.

The Standard Replacement section: 6 options from CSF, MOPAR, OSC and 1 other brand. CSF 3887 is listed in this group.

5 ungrouped parts are not assigned to a grade, with the same engine-level match.

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

5 Radiator Cap parts are listed for the 2021 Ram 1500, from GATES, MOTORAD and CALORSTAT. GATES 31528 carries the "Popular" badge.

The Locking Replacement section lists 2 options from GATES and MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. GATES 31518 is listed in this group.

The Standard Replacement section: 3 options from GATES, CALORSTAT and MOTORAD. GATES 31528 is listed in this group.

Listed part numbers: GATES 31528, GATES 31518 and MOTORAD ST16, plus the other parts above.

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

This group shows a single part: DORMAN 61134.

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

11 Radiator Fan Assembly parts for the 2021 Ram 1500 come from 8 brands — TYC, AGILITY, MOPAR and 5 other brands. The "Popular" part is DORMAN 621982.

The Economy section: 3 options from DORMAN, GPD and TECHPRO. DORMAN 621982 is listed in this group.

Standard Replacement: 8 parts, from TYC, AGILITY, MOPAR and 2 other brands. A representative part number is TYC 624830.

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 2021 Ram 1500, from FOUR SEASONS, HAYDEN, MOPAR and 1 other brand.

Part numbers include FOUR SEASONS 46088, HAYDEN 2906 and MOPAR 55056840AC, among others listed above.

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

MOPAR supplies both parts for the 2021 Ram 1500.

Part numbers include MOPAR 55056862AA and MOPAR 68241660AA.

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

10 Radiator Hose parts for the 2021 Ram 1500 come from 3 brands — MOPAR, CONTINENTAL and DAYCO. The "Popular" part is CONTINENTAL 66164.

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 2021 Ram 1500 come from MOPAR.

This group includes MOPAR 68050200AA and MOPAR 68050199AA.

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

3 Radiator Seal parts for the 2021 Ram 1500 come from MOPAR.

This group includes MOPAR 68276399AA, MOPAR 55057071AB and MOPAR 68258927AA.

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

23 Temperature Sender / Sensor parts are listed for the 2021 Ram 1500, from HOLSTEIN, STANDARD MOTOR PRODUCTS, GPD and 10 other brands. DELPHI TS10330 carries the "Popular" badge.

Economy: 11 parts, from HOLSTEIN, GPD, UNITED MOTOR PRODUCTS and 4 other brands. A representative part number is DORMAN 926427.

The Standard Replacement section: 12 options from NTK, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 4 other brands. DELPHI TS10330 is listed in this group.

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

26 Thermostat parts for the 2021 Ram 1500 come from 9 brands — MOTORAD, CALORSTAT, GATES and 6 other brands. The "Popular" part is MOTORAD 7416203. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by MOTORAD, CALORSTAT, GATES and 3 other brands.

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

7 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 Ram 1500, from FEL-PRO, APEX, MAHLE / CLEVITE and 1 other brand.

This group includes APEX AWO2413, APEX AWO2227 and FEL-PRO 36093 and the remaining parts above.

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

6 Thermostat Housing / Water Outlet parts for the 2021 Ram 1500 come from 6 brands — DORMAN, SKP, MOPAR and 3 other brands. The "Popular" part is DORMAN 902315.

The Economy section: 2 options from DORMAN and SKP. DORMAN 902315 is listed in this group.

Standard Replacement: 3 parts, from MOPAR, FOUR SEASONS and MOTORAD. A representative part number is MOPAR 53021536AB.

1 further part sits outside the graded sections, with the same engine-level match.

This group includes DORMAN 902315, SKP SK34253 and MOPAR 53021536AB 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

7 Water Pump parts for the 2021 Ram 1500 come from 5 brands — GMB, MOPAR, GATES and 2 other brands. The "Popular" part is GATES 43579.

This group includes GATES 43579, DAYCO DP2260 and FVP 1204590 and the remaining parts above.