ISUZU NPR 4HF1 Engine Overhaul Gasket Set with Multi-Layer Steel Head Gasket OEM Fit for 4HF1 / 4HF1T Engines
| Engine Compatibility: | 4HF1 / 4HF1T (4.334L, 4-cylinder, DI) | Head Gasket Bore: | 112.00 Mm |
| Head Gasket Type: | Multi-Layer Steel (MLS) | Head Gasket Thickness: | 1.75 Mm |
| Engine Displacement: | 4,334 Cc | Net Weight: | 1.65 Kg (basic) |
| Cylinder Head Torque: | 20 N·m (2.0 Kgf·m) | Cylinder Head Angle: | Additional 73° Turn Angle |
| High Light: | Multi-Layer Steel Head Gasket Engine Overhaul Gasket Set,OEM Fit Gasket Kit,4HF1 / 4HF1T Engine Compatibility Full Gasket Set |
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The Engine Overhaul Gasket Set with OEM numbers 5878139494 and 5-87813949-1 is a verified direct-fit replacement for ISUZU NPR / NQR / ELF medium-duty trucks equipped with the 4HF1 / 4HF1T 4.3L diesel engine. This complete gasket kit provides all essential seals required for professional engine rebuilding, restoration, and major maintenance.
This engine overhaul gasket set serves as the critical sealing system for the entire engine assembly. Each precision-engineered gasket maintains perfect seals between mating surfaces—cylinder head and engine block, intake and exhaust manifolds, oil pan, valve cover, and all other critical sealing points. Proper sealing is essential for maintaining compression, preventing fluid leaks, and ensuring reliable engine performance under all operating conditions.
- Coolant or oil seepage at the cylinder head joint with visible fluid traces
- Compression loss between cylinders causing misfiring, rough idle, and power loss
- Exhaust gas bubbles in the radiator indicating combustion gases entering the cooling system
- Oil contamination with coolant creating milky emulsion in the oil or oil slicks in coolant
- Persistent overheating due to combustion gases in the cooling system
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| Part Number (Short) | 5878139494 | ISUZU OEM Parts Database |
| Part Number (Long) | 5-87813949-1 | ISUZU OEM Parts Database |
| Engine Compatibility | 4HF1 / 4HF1T (4.334L, 4-cylinder, DI) | ISUZU application catalog |
| Head Gasket Thickness | 1.75 mm | DuraPro GSS2127SS2D specification |
| Head Gasket Bore | 112.00 mm | STA Parts specification |
| Cylinder Head Bolt Torque | 20 N·m + 73° turn | ISUZU 4HF1 workshop manual |
| Certification | ISO/TS 16949 | Third-party system audit |
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | NPR | NPR | 4HF1 | 2000–2009 |
| ISUZU | NPR | NPR | 4HF1 | 1994–2001 |
| ISUZU | NQR | NQR | 4HF1 | 2000–2009 |
| ISUZU | ELF | NKR / NHR | 4HF1 | 1994–2009 |
| Fastener | Torque |
|---|---|
| Cylinder Head Bolts (Stage 1) | 20 N·m (2.0 kgf·m) |
| Cylinder Head Bolts (Stage 2) | Additional 73° turn angle |
| Main Bearing Bolts (Stage 1) | 80 N·m |
| Main Bearing Bolts (Stage 2) | 100 N·m |
| Connecting Rod Bolts (Stage 1) | 22 N·m |
| Connecting Rod Bolts (Stage 2) | 45 N·m |
- Standard Packaging: Sealed bag + moisture barrier + carton
- Custom Packaging: Neutral packaging, customer-branded packaging
- Suitable For: Engine overhaul workshops, ISUZU parts distributors, fleet maintenance centers
- Supply Capacity: Stable batch supply with batch-level quality reports available
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