2020 Freightliner M2 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

12 Coolant / Antifreeze parts for the 2020 Freightliner M2 come from 3 brands — PRESTONE, VALVOLINE and PEAK. The "Popular" part is PRESTONE AF3100. 9 parts fit every engine; the other 3 are engine-specific.

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 1 option from PRESTONE — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.

In the Heavy Duty grade, PRESTONE, VALVOLINE and PEAK supply 7 parts: rated for severe service. A representative part number is VALVOLINE ZXG051.

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 supplies 1 part: built to original-equipment specification. A representative part number is VALVOLINE 861399.

This table covers the Coolant filters. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for. Read more

This group shows a single part: DONALDSON P551008.

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

2 Coolant Reservoir parts are listed for the 2020 Freightliner M2, from DORMAN and GPD.

Part numbers include DORMAN 6035203 and GPD 2421014.

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

7 Intercooler parts for the 2020 Freightliner M2 come from 2 brands — GPD and SPECTRA PREMIUM.

Listed part numbers: GPD 2711526, GPD 2711594 and GPD 2711599, plus the other parts above.

This table covers the Intercooler Air Hose pipes. Read more

5 Intercooler Air Hose / Pipe parts for the 2020 Freightliner M2 come from 2 brands — GATES and CONTINENTAL.

Listed part numbers: CONTINENTAL 57513, CONTINENTAL 57504 and GATES 26204, plus the other parts 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 for the 2020 Freightliner M2 come from 2 brands — SPECTRA PREMIUM and GPD. The "Popular" part is SPECTRA PREMIUM 20011777P.

The Economy section: 2 options from GPD. GPD 9282673 is listed in this group.

Standard Replacement: 4 parts, from SPECTRA PREMIUM. A representative part number is SPECTRA PREMIUM 20011777P.

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

Part numbers include SPECTRA PREMIUM 20011777P, GPD 9282673 and GPD 9282674, among others listed 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

24 Radiator Hose parts are listed for the 2020 Freightliner M2, from GATES, ACDELCO, CONTINENTAL and 1 other brand. CONTINENTAL 60914 carries the "Popular" badge.

The Standard Replacement section: 6 options from GATES, CONTINENTAL and ACDELCO. CONTINENTAL 60914 is listed in this group.

The Universal Hose (Straight, Bulk) section lists 4 options from GATES and ACDELCO — grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. GATES 24240 is listed in this group.

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

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

16 Thermostat parts are listed for the 2020 Freightliner M2, from CALORSTAT, MOTORAD and GATES. GATES 34308 carries the "Popular" badge.

The Heavy Duty section: 1 option from GATES. GATES 34308 is listed in this group.

The Standard Replacement section: 6 options from CALORSTAT and MOTORAD. CALORSTAT TH713082J is listed in this group.

9 ungrouped parts are not assigned to a grade, 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

This group shows a single part: ELRING 004030.

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 2020 Freightliner M2, from DAYTON and GATES.

Part numbers include DAYTON 9024008 and GATES 43570HD.

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: ELRING 004010.