2021 Lincoln Nautilus Cooling System Parts

This table covers the Auxiliary Water Pump hoses. 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

One part is listed for the 2021 Lincoln Nautilus — MOTORCRAFT KM6854.

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

13 Coolant / Antifreeze parts are listed for the 2021 Lincoln Nautilus, from PRESTONE, PEAK, MOTORCRAFT and 2 other brands. PRESTONE AF3100 carries the "Popular" badge. All of them fit every engine offered in the 2021 Nautilus.

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, PRESTONE, PEAK and VALVOLINE supply 3 parts: the catalog's value-priced group. A representative part number is PRESTONE AF3100.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 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 3 options from MOTORCRAFT and AISIN — built to original-equipment specification. MOTORCRAFT VC13G is listed in this group.

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

4 Coolant Hose / Pipe parts are listed for the 2021 Lincoln Nautilus, from MOTORCRAFT and GATES. 2 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: GATES 52541, MOTORCRAFT KM5511 and MOTORCRAFT KM6814, 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

5 Coolant Hose / Pipe Seal parts for the 2021 Lincoln Nautilus come from 3 brands — APEX, FEL-PRO and MOTORCRAFT.

Part numbers include APEX AWO2394, APEX AWO2396 and FEL-PRO 36046, among others listed above.

This table covers the gaskets that seal the Coolant Pipe. 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

2 Coolant Pipe Gasket parts for the 2021 Lincoln Nautilus come from MAHLE / CLEVITE.

This group includes MAHLE / CLEVITE C33548 and MAHLE / CLEVITE C33547.

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

4 Coolant Reservoir parts for the 2021 Lincoln Nautilus come from TECHPRO.

This group includes TECHPRO FO3014192, TECHPRO FO3014190 and TECHPRO FO3014189 and the remaining parts above.

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

5 Coolant Reservoir Cap parts for the 2021 Lincoln Nautilus come from 5 brands — MOTORAD, CALORSTAT, GATES and 2 other brands. The "Popular" part is MOTORAD T57. Every part fits both the 2.0L L4 Turbocharged and the 2.7L V6 Turbocharged.

Listed part numbers: MOTORAD T57, CALORSTAT RC0150 and GATES 31549, plus the other parts above.

This table covers the Coolant Reservoir retainers and clips. Read more

One part is listed for the 2021 Lincoln Nautilus — DORMAN 963249D.

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

5 Intercooler parts are listed for the 2021 Lincoln Nautilus, from TYC, GPD, MOTORCRAFT and 2 other brands. TYC 18085 carries the "Popular" badge. All of them fit every engine offered in the 2021 Nautilus.

Part numbers include TYC 18085, GPD 2711313 and MOTORCRAFT INTCO10, among others listed above.

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

7 Radiator parts are listed for the 2021 Lincoln Nautilus, from GPD, CSF, DENSO and 4 other brands. CSF 3793 carries the "Popular" badge. All of them fit every engine offered in the 2021 Nautilus.

Economy: 1 part, from GPD. A representative part number is GPD 13555C.

The Standard Replacement section: 6 options from CSF, DENSO, MOTORCRAFT and 3 other brands. CSF 3793 is listed in this group.

Part numbers include CSF 3793, GPD 13555C and DENSO 2219501, among others listed above.

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

One part is listed for the 2021 Lincoln Nautilus — MOTORCRAFT RS531.

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

9 Radiator Fan Assembly parts for the 2021 Lincoln Nautilus come from 6 brands — GPD, AGILITY, UAC and 3 other brands. The "Popular" part is DORMAN 620940. 8 parts fit every engine; the other 1 is engine-specific.

The Economy section: 3 options from GPD and DORMAN. DORMAN 620940 is listed in this group.

Standard Replacement: 6 parts, from AGILITY, UAC, TYC and 1 other brand. A representative part number is AGILITY 6010285.

Listed part numbers: DORMAN 620940, GPD 2812016 and GPD 2812051, 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

10 Radiator Hose parts for the 2021 Lincoln Nautilus come from 2 brands — MOTORCRAFT and CONTINENTAL. The "Popular" part is MOTORCRAFT KM7159. 3 parts fit every engine; the other 7 are engine-specific.

This table covers the brackets that mount the Radiator Mount. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: DORMAN 927842.

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

This group shows a single part: DORMAN 927283.

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

16 Temperature Sender / Sensor parts are listed for the 2021 Lincoln Nautilus, from GPD, MOTORCRAFT, STANDARD MOTOR PRODUCTS and 5 other brands. GPD 1712553 carries the "Popular" badge.

Economy: 6 parts, from GPD, VEMO and HOLSTEIN. A representative part number is GPD 1712553.

The Standard Replacement section: 10 options from MOTORCRAFT, STANDARD MOTOR PRODUCTS, WELLS and 2 other brands. MOTORCRAFT DY1187 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

19 Thermostat parts for the 2021 Lincoln Nautilus come from 5 brands — MOTORAD, MOTORCRAFT, AISIN and 2 other brands. The "Popular" part is MOTORAD 655160.

Heavy Duty: 2 parts, from MOTORAD. A representative part number is MOTORAD 5655188.

The Performance section lists 3 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2655188 is listed in this group.

Premium: 1 part, from MOTORAD. A representative part number is MOTORAD 7655188.

Standard Replacement: 11 parts, from MOTORAD, MOTORCRAFT, AISIN and 2 other brands. A representative part number is MOTORAD 655160.

2 further parts sit outside the graded sections, with the same engine-level match.

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

14 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 Lincoln Nautilus, from FEL-PRO, MAHLE / CLEVITE, MOTORCRAFT and 2 other brands. FEL-PRO 35839 carries the "Popular" badge.

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

12 Thermostat Housing / Water Outlet parts for the 2021 Lincoln Nautilus come from 6 brands — MOTORCRAFT, DORMAN, FOUR SEASONS and 3 other brands. The "Popular" part is DORMAN 902684. 2 parts fit every engine; the other 10 are engine-specific.

The Economy section: 3 options from DORMAN and ÜRO PARTS. DORMAN 902684 is listed in this group.

Standard Replacement: 9 parts, from MOTORCRAFT, FOUR SEASONS, GATES and 1 other brand. A representative part number is MOTORCRAFT RH249.

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

11 Water Pump parts for the 2021 Lincoln Nautilus come from 5 brands — GATES, FVP, US MOTOR WORKS and 2 other brands. The "Popular" part is GATES 43186WT.

The Economy section: 4 options from FVP and US MOTOR WORKS. FVP US8181 is listed in this group.

Standard Replacement: 7 parts, from GATES, MOTORCRAFT and GMB. A representative part number is GATES 43186WT.

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

6 Water Pump Gasket parts are listed for the 2021 Lincoln Nautilus, from MAHLE / CLEVITE and APEX.

Listed part numbers: APEX AWP3313, APEX AWP3314 and MAHLE / CLEVITE K33850, plus the other parts above.

This table covers the Water Pump housings. Read more

One part is listed for the 2021 Lincoln Nautilus — MOTORAD CH3103.

This table covers the Water Pump Seal O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

This group shows a single part: FEL-PRO 36118.