2019 Isuzu NPR 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

14 Coolant / Antifreeze parts for the 2019 Isuzu NPR come from 4 brands — PRESTONE, PEAK, VALVOLINE and 1 other brand. The "Popular" part is FVP MV5050GAL. 7 parts fit every engine; the other 7 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 4 options from FVP, PEAK, PRESTONE and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.

In the Heavy Duty grade, PEAK, PRESTONE and VALVOLINE supply 3 parts: rated for severe service. A representative part number is PEAK FXA1GAL.

In the Premium grade, PRESTONE and PEAK supply 4 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 and PEAK supply 2 parts: built to original-equipment specification. A representative part number is VALVOLINE ZXEL1.

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

This group shows a single part: SPECTRA PREMIUM 20010707P.

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 31336.

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

3 Temperature Sender / Sensor parts for the 2019 Isuzu NPR come from 2 brands — STANDARD MOTOR PRODUCTS and DORMAN.

The Economy section: 2 options from DORMAN and STANDARD MOTOR PRODUCTS. DORMAN 926016 is listed in this group.

Standard Replacement: 1 part, from STANDARD MOTOR PRODUCTS. A representative part number is STANDARD MOTOR PRODUCTS TX89.

Part numbers include DORMAN 926016, STANDARD MOTOR PRODUCTS TX89T and STANDARD MOTOR PRODUCTS TX89.

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

15 Thermostat parts are listed for the 2019 Isuzu NPR, from MOTORAD, GATES, DORMAN and 1 other brand. GATES 34198 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 9022981.

The Heavy Duty section: 3 options from MOTORAD and GATES. GATES 34198S is listed in this group.

In the Performance grade, MOTORAD supplies 2 parts: engineered beyond original-equipment specification. A representative part number is MOTORAD 2523160.

The Standard Replacement section: 6 options from MOTORAD and GATES. GATES 34198 is listed in this group.

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

This table covers the housings and outlets the thermostat sits in. Read more

2 Thermostat Housing / Water Outlet parts are listed for the 2019 Isuzu NPR, from GATES and MOTORAD.

Listed part numbers: GATES CO34829 and MOTORAD CH5945.

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

8 Water Pump parts are listed for the 2019 Isuzu NPR, from US MOTOR WORKS, FVP, GMB and 2 other brands. US MOTOR WORKS US6009 carries the "Popular" badge.

Economy: 5 parts, from US MOTOR WORKS, FVP and SKP. A representative part number is US MOTOR WORKS US6009.

The Standard Replacement section: 3 options from GMB and GATES. GATES 45010 is listed in this group.

Listed part numbers: US MOTOR WORKS US6009 and US MOTOR WORKS US6009T, plus the other parts above.