2018 International Prostar 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

13 Coolant / Antifreeze parts for the 2018 International Prostar come from 3 brands — PRESTONE, VALVOLINE and PEAK. The "Popular" part is PRESTONE AF3100. 12 parts fit every engine; the other 1 is 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, PEAK, PRESTONE and VALVOLINE supply 8 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

4 Coolant Filter parts for the 2018 International Prostar come from 2 brands — DONALDSON and WIX.

Listed part numbers: DONALDSON P550867, DONALDSON P550866 and WIX 24113, plus the other parts above.

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

4 Coolant Reservoir parts are listed for the 2018 International Prostar, from GPD, DORMAN and SKP. 1 part fits every engine; the other 3 are engine-specific.

Listed part numbers: DORMAN 6035105, GPD 2421012 and GPD 2421003, plus the other 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

2 Coolant Reservoir Cap parts are listed for the 2018 International Prostar, from GATES and MOTORAD. 1 part fits every engine; the other 1 is engine-specific.

Listed part numbers: GATES 31405 and MOTORAD T39.

This table covers the Hose clamps. Read more

This group shows a single part: DORMAN 9044000.

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

5 Intercooler parts for the 2018 International Prostar come from 2 brands — GPD and SPECTRA PREMIUM. 3 parts fit every engine; the other 2 are engine-specific.

Part numbers include GPD 2711500, GPD 2711621 and GPD 2711445, among others listed above.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2018 International Prostar come from 2 brands — CONTINENTAL and GATES.

Listed part numbers: CONTINENTAL 57504 and GATES 26200.

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

5 Radiator parts for the 2018 International Prostar come from 2 brands — GPD and SPECTRA PREMIUM. The "Popular" part is SPECTRA PREMIUM 20013560P. Every part fits both the 12.4L L6 DIESEL Turbocharged and the 14.9L L6 DIESEL Turbocharged.

The Economy section: 3 options from GPD. GPD 9282773 is listed in this group.

Standard Replacement: 2 parts, from SPECTRA PREMIUM. A representative part number is SPECTRA PREMIUM 20013560P.

Part numbers include SPECTRA PREMIUM 20013560P, GPD 9282773 and GPD 9282774, 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

This group shows a single part: GATES 31405.

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

7 Thermostat parts are listed for the 2018 International Prostar, from MOTORAD and CALORSTAT. MOTORAD 15199 carries the "Popular" badge. 2 parts fit every engine; the other 5 are engine-specific.

This group includes MOTORAD 15199, MOTORAD 406190 and CALORSTAT THS1910582 and the remaining parts above.

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

2 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2018 International Prostar come from DAYTON.

Part numbers include DAYTON 6745008G and DAYTON 6745003G.

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

10 Water Pump parts are listed for the 2018 International Prostar, from US MOTOR WORKS, GMB and FVP. US MOTOR WORKS US932 carries the "Popular" badge.

Economy: 3 parts, from FVP and US MOTOR WORKS. A representative part number is US MOTOR WORKS US932.

The Standard Replacement section: 3 options from GMB. GMB 1962230 is listed in this group.

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