2021 Isuzu NPR Engine Parts

This table covers the head gaskets that seal the block to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

This group shows a single part: ENGINE PRO 2812688186.

This table covers the exhaust valves that let combustion gas out of the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

QUALCAST supplies both parts for the 2021 Isuzu NPR.

Listed part numbers: QUALCAST 1013122 and QUALCAST 1013464.

This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

QUALCAST supplies both parts for the 2021 Isuzu NPR.

Part numbers include QUALCAST 1013121 and QUALCAST 1013463.

This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable. Read more

VALVOLINE supplies the 5 Oil parts for the 2021 Isuzu NPR.

In the Full Synthetic grade, VALVOLINE supplies 1 part: full-synthetic oils. A representative part number is VALVOLINE 909772.

In the Heavy Duty / Diesel grade, VALVOLINE supplies 1 part: grouped under the catalog's "Heavy Duty / Diesel" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE 909778.

In the Synthetic Blend grade, VALVOLINE supplies 3 parts: synthetic-blend oils. A representative part number is VALVOLINE 909766.

Part numbers include VALVOLINE 909772, VALVOLINE 909778 and VALVOLINE 909766, among others listed above.

This table covers the caps on the oil filler neck. Read more

One part is listed for the 2021 Isuzu NPR — MOTORAD MO101.

This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive. Read more

9 Oil Filter parts are listed for the 2021 Isuzu NPR, from VARIOUS MFR, WIX, HASTINGS / BALDWIN and 3 other brands. VARIOUS MFR PG2500 carries the "Popular" badge.

In the Economy grade, VARIOUS MFR, ECOGARD and FRAM supply 3 parts: the catalog's value-priced group. A representative part number is VARIOUS MFR PG2500.

The Standard Replacement section lists 6 options from WIX, HASTINGS / BALDWIN, MAHLE / CLEVITE and 1 other brand — built to original-equipment specification. WIX WL10255 is listed in this group.

Listed part numbers: VARIOUS MFR PG2500, ECOGARD X11646 and FRAM FE10575, plus the other parts above.

This table covers the rings that seal each piston to the cylinder wall. Read more

This group shows a single part: HASTINGS MANUFACTURING 2N5295.

This table covers the Turbocharger Wastegate Solenoid actuators. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same. Read more

One part is listed for the 2021 Isuzu NPR — DORMAN 667947.

This table covers the gaskets that seal the valve cover to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2021 Isuzu NPR — FEL-PRO VS50907R.

This table covers the pressed-in bronze and cast-iron guides that align valve stems. Typical signs include oil smoke on startup, a guide that has gone oval, or a valve that no longer seats quietly. Guides are a machine-shop fit. Confirm stem diameter in the notes before ordering. Read more

QUALCAST supplies both parts for the 2021 Isuzu NPR.

This group includes QUALCAST 303297 and QUALCAST 303101.

This table covers the Valve seats. Read more

2 Valve Seat parts for the 2021 Isuzu NPR come from QUALCAST.

This group includes QUALCAST 2215021 and QUALCAST 2215022.

This table covers the springs that close each intake and exhaust valve. Typical signs include a sagging corner, a broken coil, or a clunk from the spring pocket. Replace springs in axle pairs and inspect the seats. Read more

5 Valve Spring parts for the 2021 Isuzu NPR come from MELLING.

Part numbers include MELLING VSK461208LT, MELLING VSK461208TLT and MELLING VSK46656LT, among others listed above.

This table covers the seals on each valve stem that control oil into the guides. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

QUALCAST supplies both parts for the 2021 Isuzu NPR.

Listed part numbers: QUALCAST 3896245 and QUALCAST 38700255.