2018 Freightliner MT 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 are listed for the 2018 Freightliner MT, from PRESTONE, VALVOLINE and PEAK. PRESTONE AF3100 carries the "Popular" badge. All of them fit every engine offered in the 2018 MT.

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 supplies 1 part: the catalog's value-priced group. A representative part number is PRESTONE AF3100.

The Heavy Duty section lists 7 options from PRESTONE, VALVOLINE and PEAK — rated for severe service. VALVOLINE ZXG051 is listed in this group.

The Premium section lists 2 options from PRESTONE — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 1 option from VALVOLINE — built to original-equipment specification. VALVOLINE 861399 is listed in this group.

This table covers the Coolant Level sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

GPD supplies both parts for the 2018 Freightliner MT.

This group includes GPD 1816403 and GPD 1816610.

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

This group shows a single part: GPD 2421017.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts are listed for the 2018 Freightliner MT, from CONTINENTAL and GATES.

This group includes CONTINENTAL 57512 and GATES 26201.

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

SPECTRA PREMIUM supplies both parts for the 2018 Freightliner MT. All of them fit every engine offered in the 2018 MT.

Part numbers include SPECTRA PREMIUM 20011737 and SPECTRA PREMIUM 20011737P.

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 2018 Freightliner MT come from 4 brands — GATES, ACDELCO, DAYCO and 1 other brand. The "Popular" part is GATES 24232.

Standard Replacement: 3 parts, from ACDELCO, DAYCO and GATES. A representative part number is ACDELCO 20199S.

In the Universal Hose (Straight, Bulk) grade, GATES and CONTINENTAL supply 2 parts: grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. A representative part number is GATES 24232.

5 further parts sit outside the graded sections, 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

5 Thermostat parts for the 2018 Freightliner MT come from 3 brands — MOTORAD, CALORSTAT and GATES. 1 part fits every engine; the other 4 are engine-specific.

Listed part numbers: CALORSTAT TH713082J, GATES 33915 and MOTORAD 400995, plus the other 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

12 Water Pump parts for the 2018 Freightliner MT come from 6 brands — US MOTOR WORKS, FVP, GMB and 3 other brands. The "Popular" part is US MOTOR WORKS US6009.

The Economy section: 4 options from US MOTOR WORKS and FVP. US MOTOR WORKS US6009 is listed in this group.

The High Volume / Pressure section lists 3 options from FVP, GATES and US MOTOR WORKS — grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. FVP US7123H is listed in this group.

Standard Replacement: 5 parts, from GMB, DAYCO and MELLING. A representative part number is DAYCO DP1000.