2017 International Workstar 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 2017 International Workstar, from PRESTONE, VALVOLINE and PEAK. PRESTONE AF3100 carries the "Popular" badge. 6 parts fit every engine; the other 6 are engine-specific.

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

4 Coolant Level Sensor parts are listed for the 2017 International Workstar, from GPD and DORMAN.

This group includes DORMAN 9047550, GPD 1816403 and GPD 1816610 and the remaining parts above.

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

4 Coolant Reservoir parts for the 2017 International Workstar come from 2 brands — GPD and DORMAN.

Part numbers include DORMAN 6035132, GPD 2421019 and GPD 2421029, among others listed 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 for the 2017 International Workstar come from 2 brands — GATES and MOTORAD. 1 part fits every engine; the other 1 is engine-specific.

This group includes GATES 31405 and MOTORAD T39.

This table covers the adapters used to pressure-test this cooling system. Read more

GATES supplies both parts for the 2017 International Workstar.

This group includes GATES 31379 and GATES 31410.

This table covers the Hose clamps. Read more

One part is listed for the 2017 International Workstar — DORMAN 9044000.

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

GPD supplies both parts for the 2017 International Workstar.

This group includes GPD 2711626 and GPD 2711627.

This table covers the Intercooler Air Hose pipes. Read more

5 Intercooler Air Hose / Pipe parts are listed for the 2017 International Workstar, from GATES and CONTINENTAL.

Part numbers include CONTINENTAL 57504, CONTINENTAL 57513 and GATES 26200, 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

3 Radiator parts are listed for the 2017 International Workstar, from SPECTRA PREMIUM and GPD.

Economy: 1 part, from GPD. A representative part number is GPD 9282753.

The Standard Replacement section: 1 option from SPECTRA PREMIUM. SPECTRA PREMIUM 20013564P is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

Part numbers include GPD 9282753 and SPECTRA PREMIUM 20013564P, 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

6 Radiator Hose parts for the 2017 International Workstar come from 3 brands — CONTINENTAL, GATES and DAYCO. The "Popular" part is GATES 21891.

Standard Replacement: 3 parts, from CONTINENTAL and GATES. A representative part number is GATES 21891.

In the Universal Hose (Straight, Bulk) grade, CONTINENTAL supplies 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 CONTINENTAL 57230.

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

Listed part numbers: GATES 21891, CONTINENTAL 60957 and CONTINENTAL 66552, plus the other parts above.

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

One part is listed for the 2017 International Workstar — DORMAN 9047549.

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

13 Thermostat parts for the 2017 International Workstar come from 4 brands — MOTORAD, CALORSTAT, GATES and 1 other brand. The "Popular" part is MOTORAD 406160.

Heavy Duty: 1 part, from GATES. A representative part number is GATES 34308.

Standard Replacement: 2 parts, from MOTORAD. A representative part number is MOTORAD 407160.

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

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

18 Water Pump parts for the 2017 International Workstar come from 7 brands — FVP, US MOTOR WORKS, GATES and 4 other brands. The "Popular" part is GATES 43570HD.

The Economy section: 2 options from FVP. FVP US69NX is listed in this group.

The High Volume / Pressure section lists 5 options from GATES, FVP and US MOTOR WORKS — grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. GATES 43570HD is listed in this group.

Standard Replacement: 3 parts, from MELLING, DAYCO and GMB. A representative part number is MELLING MWP521.

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