2026 Buick Encore 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

11 Coolant / Antifreeze parts for the 2026 Buick Encore come from 3 brands — PRESTONE, VALVOLINE and ACDELCO. The "Popular" part is PRESTONE AF2100. Every part fits both the 1.2L L3 Turbocharged and the 1.3L L3 Turbocharged.

In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.

The Economy section lists 2 options from PRESTONE and VALVOLINE — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.

In the Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

In the Premium grade, PRESTONE supplies 2 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.

In the Standard Replacement grade, VALVOLINE, PRESTONE and ACDELCO supply 5 parts: built to original-equipment specification. A representative part number is ACDELCO 105027.

This table covers the Coolant Air Bleed Hose pipes. Read more

This group shows a single part: GM GENUINE 42869226.

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

3 Coolant Hose / Pipe parts for the 2026 Buick Encore come from GM GENUINE. Every part fits both the 1.2L L3 Turbocharged and the 1.3L L3 Turbocharged.

Part numbers include GM GENUINE 12673762, GM GENUINE 42755860 and GM GENUINE 12702515.

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

One part is listed for the 2026 Buick Encore — GM GENUINE 12666900.

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

2 Coolant Hose Retainer / Clip parts for the 2026 Buick Encore come from GM GENUINE. Every part fits both the 1.2L L3 Turbocharged and the 1.3L L3 Turbocharged.

Listed part numbers: GM GENUINE 42732057 and GM GENUINE 42755861.

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

One part is listed for the 2026 Buick Encore — ELRING 112820.

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

One part is listed for the 2026 Buick Encore — GM GENUINE 13545831.

This table covers the Hose clamps. Read more

5 Hose Clamp parts for the 2026 Buick Encore come from GM GENUINE. The "Popular" part is GM GENUINE 13162312. Every part fits both the 1.2L L3 Turbocharged and the 1.3L L3 Turbocharged.

This group includes GM GENUINE 13162312, GM GENUINE 90572594 and GM GENUINE 11547681 and the remaining parts above.

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

This group shows a single part: GM GENUINE 42883251.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2026 Buick Encore come from GM GENUINE. Every part fits both the 1.2L L3 Turbocharged and the 1.3L L3 Turbocharged.

Part numbers include GM GENUINE 60009092 and GM GENUINE 60009112.

This table covers the Intercooler Hose / Pipe clamps. Read more

One part is listed for the 2026 Buick Encore — GM GENUINE 42651298.

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

6 Radiator parts for the 2026 Buick Encore come from 4 brands — CSF, GM GENUINE, GPD and 1 other brand.

The Economy section: 1 option from GPD. GPD 13909C is listed in this group.

Standard Replacement: 3 parts, from CSF, FVP and GM GENUINE. A representative part number is CSF 3955.

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

This group includes GPD 13909C, CSF 3955 and FVP RAD13909 and the remaining parts 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

This group shows a single part: ACDELCO 13544913.

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

One part is listed for the 2026 Buick Encore — GM GENUINE 22790134.

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

One part is listed for the 2026 Buick Encore — GM GENUINE 60009121.

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

ACDELCO supplies both parts for the 2026 Buick Encore. All of them fit every engine offered in the 2026 Encore.

This group includes ACDELCO 42822117 and ACDELCO 42822959.

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

9 Temperature Sender / Sensor parts for the 2026 Buick Encore come from 2 brands — GM GENUINE and HOLSTEIN. The "Popular" part is GM GENUINE 55488246.

The Economy section: 3 options from HOLSTEIN. HOLSTEIN 2CTS0331 is listed in this group.

Standard Replacement: 3 parts, from GM GENUINE. A representative part number is GM GENUINE 55488246.

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

This group includes GM GENUINE 55488246, HOLSTEIN 2CTS0331 and HOLSTEIN 2CTS0330 and the remaining parts above.

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 Buick Encore — MOTORAD TA9252.

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 are listed for the 2026 Buick Encore, from GATES and GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

Listed part numbers: GATES 42360 and GM GENUINE 25208565.

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: GM GENUINE 2512077.