ISUZU 4JB1 Engine Overhaul Gasket Set with 4-Layer Metal Head Gasket OEM Fit and 12 Months Warranty
| Engine Displacement: | 2,771 Cc | Head Gasket Thickness: | 1.70 Mm |
| Net Weight: | 1.35 Kg (basic) / 2.27 Kg (full Set) | Head Gasket Type: | 4-Layer Metal (MLS) |
| Package Dimensions: | 54 × 30 × 3 Cm | Cylinder Head Bolt Torque: | 98 -108 N*m (main Sequence) |
| Cylinder Head Bolt Torque (Stage 1): | 49 N*m (36.2 Lb Ft) | Cylinder Head Bolt Torque (Stage 2): | 60-75° Turn Angle |
| High Light: | 4-Layer Metal Head Gasket Engine Overhaul Gasket Set,OEM Fit Gasket Kit,12 Months Warranty Full Gasket Kit |
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Engine Overhaul Gasket Set 5878127067 5-87812706-7 for ISUZU NKR55 4JB1 4JB1T 2.8L — Verified OEM Fit Full Gasket Kit with 4-Layer Metal Head Gasket
This complete engine overhaul gasket set with OEM numbers 5878127067 and 5-87812706-7 is a verified direct-fit replacement for ISUZU NKR55/NHR/ELF 250 light trucks equipped with the 4JB1/4JB1T 2.8L diesel engine. This full gasket kit provides all essential gaskets and seals required for professional engine rebuilding, restoration, and major maintenance.
The engine overhaul gasket set serves as the critical sealing system for the entire engine assembly. Each gasket is precision-engineered to maintain 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 oil and coolant leaks, and ensuring reliable engine performance. The 4JB1 engine is known for exceptional durability, routinely exceeding 500,000 km in commercial service with proper maintenance.
Replace the gasket set when any of these symptoms appear:
- Coolant or oil seepage at cylinder head joint — visible fluid traces along head-to-block mating surface
- Compression loss between cylinders — causes misfiring, rough idle, and power loss
- Exhaust gas bubbles in the radiator — combustion gases entering cooling system
- Oil contamination with coolant or vice versa — creates milky emulsion in oil or oil slicks in coolant
- Overheating — combustion gases in cooling system cause localized hot spots
| Verification Item | Data / Standard | Source / Method |
|---|---|---|
| Part Number (Short) | 5878127067 | ISUZU OEM Parts Database |
| Part Number (Long) | 5-87812706-7 | ISUZU OEM Parts Database |
| Part Name | GASKET SET; ENGINE OVERHAUL | ISUZU EPC |
| Engine Compatibility | 4JB1 / 4JB1T (2.8L, 4-cylinder, OHV, DI) | ISUZU application catalog |
| Head Gasket Type | 4-Layer Metal (MLS) | Product specification |
| Head Gasket Thickness | 1.70 mm | Product specification |
| Cylinder Head Bolt Torque | 98-108 N*m (main sequence) | ISUZU 4JB1 workshop manual |
| Net Weight | 1.35 kg (basic set) / 2.27 kg (full set) | Product specification |
| Package Dimensions | 54 × 30 × 3 cm | Product specification |
| Certification | ISO/TS 16949 | Third-party system audit |
| Part Number: | 5878127067 5-87812706-7 | Product Name: | Overhaul Gasket Set |
|---|---|---|---|
| Car Model: | NKR55 | Engine Model: | 4JB1 |
| Condition: | 100% Brand New | Origin: | China Mainland |
| Brand | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| ISUZU | ELF | NKR55 | 4JB1 | 1987-1993 |
| ISUZU | ELF | NKR55 | 4JB1 | 1996-2007 |
| ISUZU | ELF | NHR | 4JB1 / 4JA1 | 1984-1993 |
| ISUZU | ELF 250 | NKR / NHR | 4JB1 | 1991-2007 |
| ISUZU | Pickup | TF | 4JB1 | 1988-2002 |
| ISUZU | Trooper | -- | 4JB1-T | 1988-2002 |
- This gasket set is designed for the 4JB1 and 4JB1T engine family
- The head gasket is a 4-layer metal (MLS) type with 1.70 mm thickness
- For engines that have been previously resurfaced, check cylinder head and block deck heights before ordering
Superior sealing under high combustion pressures and thermal cycling
Includes all essential gaskets and seals for professional engine rebuild
Withstands extreme temperatures and pressure variations
Direct replacement without modification required
Full traceability with material certificates
Confirmed reliable fitment across the 4JB1 platform
| QC Item | Verification Method / Standard |
|---|---|
| Head Gasket Thickness | Micrometer, 100% inspection (1.70 mm ±0.05) |
| Head Gasket Layer Bonding | Visual + peel test, batch sampling |
| Gasket Dimensions | CMM + dedicated gauges, 100% inspection |
| Material Composition | Spectrometer analysis, batch sampling |
| Compression Resistance | Compression tester, batch sampling |
| Temperature Resistance | Thermal cycling test (−40°C to +200°C), batch sampling |
Reference ISUZU 4JB1 Workshop Manual:
- Preparation: Remove engine from vehicle or position for top-end access. Drain coolant and oil.
- Disassembly: Remove cylinder head bolts in reverse of tightening sequence. Clean all mating surfaces.
- Inspection: Check cylinder head and block decks for flatness. Resurface if necessary.
- Head Gasket Installation: Place new 4-layer metal head gasket on block dowels with correct orientation.
- Cylinder Head Installation: Carefully lower cylinder head onto gasket. Lubricate head bolt threads.
- Torque Sequence: Tighten in specified numerical order: Stage 1: 49 N*m; Stage 2: 60-75° turn angle.
- Other Gaskets: Install remaining gaskets and seals.
- Final Assembly: Reconnect all components. Refill fluids. Run engine and check for leaks.
| Fastener | Torque |
|---|---|
| Cylinder Head Bolts (Stage 1) | 49 N*m (36.2 lb ft) |
| Cylinder Head Bolts (Stage 2) | 60-75° turn angle |
| Cylinder Head Bolts (Final Torque) | 98-108 N*m |
| Connecting Rod Bearing Bolts | 78.4-88.2 N*m |
| Crankshaft Bearing Cap Bolts | 225.4-245.0 N*m |
- Standard Packaging: Sealed bag + moisture barrier + carton (54 × 30 × 3 cm)
- Custom Packaging: Neutral packaging, customer-branded packaging available
- 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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