2012 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

15 Coolant / Antifreeze parts for the 2012 International Workstar come from 3 brands — PRESTONE, VALVOLINE and PEAK. The "Popular" part is PRESTONE AF3100. 11 parts fit every engine; the other 4 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 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.

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

3 Coolant Filter parts for the 2012 International Workstar come from 2 brands — HASTINGS / BALDWIN and WIX.

Listed part numbers: HASTINGS / BALDWIN WC16, HASTINGS / BALDWIN B5090 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

This group shows a single part: DORMAN 9047550.

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

5 Coolant Reservoir parts are listed for the 2012 International Workstar, from GPD and DORMAN. 1 part fits every engine; the other 4 are engine-specific.

Listed part numbers: DORMAN 6035132, GPD 2421031 and GPD 2421019, 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

4 Coolant Reservoir Cap parts are listed for the 2012 International Workstar, from DORMAN, GATES, MOTORAD and 1 other brand. 2 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: DORMAN 9025102, GATES 31405 and MOTORAD T39, plus the other parts above.

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

2 Cooling System Tester Adapter parts for the 2012 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

7 Intercooler parts for the 2012 International Workstar come from 2 brands — GPD and SPECTRA PREMIUM. 1 part fits every engine; the other 6 are engine-specific.

This group includes GPD 2711611, GPD 2711613 and GPD 2711614 and the remaining parts above.

This table covers the Intercooler Air Hose pipes. Read more

5 Intercooler Air Hose / Pipe parts for the 2012 International Workstar come from 2 brands — GATES and CONTINENTAL.

This group includes CONTINENTAL 57504, CONTINENTAL 57513 and GATES 26200 and the remaining 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

8 Radiator parts for the 2012 International Workstar come from 2 brands — GPD and SPECTRA PREMIUM. The "Popular" part is SPECTRA PREMIUM 20013549. 5 parts fit every engine; the other 3 are engine-specific.

The Economy section: 6 options from GPD. GPD 9282742 is listed in this group.

Standard Replacement: 2 parts, from SPECTRA PREMIUM. A representative part number is SPECTRA PREMIUM 20013549.

This group includes SPECTRA PREMIUM 20013549, GPD 9282742 and GPD 9282753 and the remaining parts 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 31567.

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

16 Radiator Hose parts are listed for the 2012 International Workstar, from DAYCO and GATES. DAYCO 71812 carries the "Popular" badge.

The Standard Replacement section: 8 options from DAYCO and GATES. DAYCO 71812 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 24840 is listed in this group.

6 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

16 Thermostat parts are listed for the 2012 International Workstar, from MOTORAD, CALORSTAT, GATES and 1 other brand. GATES 34148 carries the "Popular" badge.

The Heavy Duty section: 5 options from GATES and STANT. GATES 34148 is listed in this group.

The Standard Replacement section: 9 options from MOTORAD and CALORSTAT. CALORSTAT THS1910582 is listed in this group.

2 ungrouped parts are not assigned to a grade, 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

10 Water Pump parts are listed for the 2012 International Workstar, from DAYCO, US MOTOR WORKS, FVP and 2 other brands. GMB 1962240 carries the "Popular" badge.

Economy: 3 parts, from US MOTOR WORKS and FVP. A representative part number is FVP US89.

In the High Volume / Pressure grade, GATES supplies 1 part: grouped under the catalog's "High Volume / Pressure" designation — the notes column spells out what sets them apart. A representative part number is GATES 42355HD.

The Standard Replacement section: 4 options from DAYCO and GMB. GMB 1962240 is listed in this group.

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