2016 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

20 Coolant / Antifreeze parts for the 2016 International Workstar come from 3 brands — PRESTONE, VALVOLINE and PEAK. The "Popular" part is PRESTONE AF3100.

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, VALVOLINE, PRESTONE and PEAK supply 9 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.

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

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

3 Coolant Filter parts for the 2016 International Workstar come from 2 brands — HASTINGS / BALDWIN and WIX.

This group includes HASTINGS / BALDWIN WC8, HASTINGS / BALDWIN LOPRI and WIX 24070.

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

2 Coolant Level Sensor parts for the 2016 International Workstar come from GPD.

This group includes GPD 1816403 and GPD 1816610.

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

3 Coolant Reservoir parts are listed for the 2016 International Workstar, from GPD and DORMAN.

This group includes DORMAN 6035132, GPD 2421019 and GPD 2421035.

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

3 Coolant Reservoir Cap parts are listed for the 2016 International Workstar, from DORMAN, GATES and MOTORAD.

Listed part numbers: DORMAN 9025102, GATES 31405 and MOTORAD T39.

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

2 Cooling System Tester Adapter parts for the 2016 International Workstar come from GATES.

Part numbers include GATES 31379 and GATES 31410.

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

2 Intercooler parts for the 2016 International Workstar come from GPD.

Part numbers include GPD 2711626 and GPD 2711627.

This table covers the Intercooler Air Hose pipes. Read more

3 Intercooler Air Hose / Pipe parts for the 2016 International Workstar come from GATES.

This group includes GATES 26200, GATES 26203 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

6 Radiator parts for the 2016 International Workstar come from 3 brands — SPECTRA PREMIUM, GPD and OSC.

The Economy section: 1 option from GPD. GPD 9282753 is listed in this group.

In the Standard Replacement grade, SPECTRA PREMIUM and OSC supply 3 parts: built to original-equipment specification. A representative part number is OSC HD1034.

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

This group includes GPD 9282753, OSC HD1034 and SPECTRA PREMIUM 20013542 and the remaining parts 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

10 Radiator Hose parts are listed for the 2016 International Workstar, from GATES, CONTINENTAL, DAYCO and 1 other brand. GATES 21194 carries the "Popular" badge.

The Standard Replacement section: 3 options from GATES and ACDELCO. GATES 21194 is listed in this group.

The Universal Hose (Straight, Bulk) section lists 2 options from GATES — grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. GATES 24440 is listed in this group.

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

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

This group shows a single part: 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

9 Thermostat parts are listed for the 2016 International Workstar, from MOTORAD, CALORSTAT and GATES. MOTORAD 406160 carries the "Popular" badge.

Part numbers include MOTORAD 406160, MOTORAD 406190 and CALORSTAT THS1910582, among others listed 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

13 Water Pump parts are listed for the 2016 International Workstar, from FVP, US MOTOR WORKS, GATES and 2 other brands. MELLING MWP521 carries the "Popular" badge.

Economy: 1 part, from FVP. A representative part number is FVP US89.

In the High Volume / Pressure grade, GATES, FVP and US MOTOR WORKS supply 4 parts: grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. A representative part number is FVP US7123H.

The Standard Replacement section: 2 options from MELLING and GMB. MELLING MWP521 is listed in this group.

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