This set includes two (2) crankshaft oil seals — front and rear main positions — engineered as direct OE-style replacements for Isuzu NRR, NQR, NPR, and NPR-HD trucks equipped with 4HE1 4.8L or 4HK1 5.2L diesel engines (1998–2025). Manufactured to match factory specifications, these seals provide reliable oil containment at both crankshaft ends, helping protect the timing components, flywheel, and clutch area. Precision-molded sealing lips ensure proper shaft contact, consistent pressure distribution, and long-term durability under continuous commercial-duty operation. Constructed from high-grade oil- and heat-resistant elastomer materials, the seals are designed to withstand high RPM conditions, crankcase pressure fluctuations, and extended engine run time typical in fleet vehicles.

Complete Front & Rear Set — Includes both front crankshaft seal and rear main seal.

OE-Spec Dimensions — Matches original diameter and sealing lip configuration for proper fitment.

Full Engine Oil Leak Protection — Seals both crankshaft ends to prevent oil seepage.

Heat & Wear Resistant Material — Engineered for durability in high-temperature diesel applications.

Commercial-Grade Reliability — Suitable for medium-duty trucks, delivery fleets, and work vehicles.

Direct Replacement Installation — Installs in factory locations without modification.

OEM

8976023790 / 8983343390 / 8943706370

8973297800 / 8943695180