2006 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 2006 Isuzu NPR come from 4 brands — PRESTONE, PEAK, VALVOLINE and 1 other brand. The "Popular" part is FVP MV5050GAL. Every part fits both the 5.2L L4 DIESEL Turbocharged and the 6.0L V8.

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, PRESTONE and PEAK 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 supplies 2 parts: built to original-equipment specification. A representative part number is VALVOLINE ZXEL1.

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

One part is listed for the 2006 Isuzu NPR — DORMAN 6035603.

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

One part is listed for the 2006 Isuzu NPR — DORMAN 9241059.

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

4 Cooling System Tester Adapter parts for the 2006 Isuzu NPR come from 3 brands — MOTORAD, GATES and STANT. Every part fits both the 5.2L L4 DIESEL Turbocharged and the 6.0L V8.

Listed part numbers: GATES 31428, MOTORAD 3121 and MOTORAD 3122, plus the other parts above.

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

3 Intercooler parts for the 2006 Isuzu NPR come from 3 brands — CSF, GPD and SPECTRA PREMIUM.

Part numbers include CSF 6050, GPD 2711271 and SPECTRA PREMIUM 44010707.

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

12 Radiator parts for the 2006 Isuzu NPR come from 6 brands — GPD, CSF, OSC and 3 other brands. The "Popular" part is CSF 3209. 1 part fits every engine; the other 11 are engine-specific.

The Economy section: 4 options from GPD and ULTRA-POWER. GPD 9243219 is listed in this group.

In the Heavy Duty (All Metal Construction) grade, CSF supplies 1 part: rated for severe service. A representative part number is CSF 3219.

Standard Replacement: 5 parts, from CSF, OSC and UAC. A representative part number is CSF 3209.

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

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

7 Radiator Cap parts for the 2006 Isuzu NPR come from 5 brands — GATES, MOTORAD, CALORSTAT and 2 other brands. The "Popular" part is MOTORAD T16R. Every part fits both the 5.2L L4 DIESEL Turbocharged and the 6.0L V8.

In the Locking Replacement grade, CALORSTAT, GATES and MOTORAD supply 3 parts: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is CALORSTAT RC0212.

Standard Replacement: 4 parts, from MOTORAD, SKP, CSF and 1 other brand. A representative part number is MOTORAD T16R.

Listed part numbers: MOTORAD T16R, CALORSTAT RC0212 and GATES 31534, plus the other parts above.

This table covers the Radiator Fan clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

4 Radiator Fan Clutch parts for the 2006 Isuzu NPR come from 4 brands — FOUR SEASONS, HAYDEN, NISSENS and 1 other brand.

Listed part numbers: FOUR SEASONS 36947, HAYDEN 2787 and NISSENS 86465, plus the other 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

13 Radiator Hose parts are listed for the 2006 Isuzu NPR, from CONTINENTAL, GATES, DAYCO and 1 other brand. CONTINENTAL 62699 carries the "Popular" badge.

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 2006 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.

This group includes 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

11 Thermostat parts are listed for the 2006 Isuzu NPR, from MOTORAD, GATES, DORMAN and 1 other brand. GATES 33963 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 9022836.

The Heavy Duty section: 3 options from GATES. GATES 33963 is listed in this group.

The Standard Replacement section: 6 options from MOTORAD. MOTORAD 456187 is listed in this group.

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

4 Thermostat Housing / Water Outlet parts are listed for the 2006 Isuzu NPR, from AUTOTECNICA, DORMAN, GATES and 1 other brand.

Economy: 2 parts, from AUTOTECNICA and DORMAN. A representative part number is AUTOTECNICA GM0718508.

The Standard Replacement section: 2 options from GATES and MOTORAD. GATES CO34923 is listed in this group.

Listed part numbers: AUTOTECNICA GM0718508, DORMAN 902836 and GATES CO34923, plus the other parts 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

14 Water Pump parts are listed for the 2006 Isuzu NPR, from FVP, GMB, SKP and 4 other brands. SKP SK1307340 carries the "Popular" badge.

Economy: 6 parts, from SKP, US MOTOR WORKS and FVP. A representative part number is SKP SK1307340.

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 42239HD.

The Standard Replacement section: 7 options from GMB, AISIN, DAYCO and 2 other brands. AISIN WPG027 is listed in this group.