Full Engine Overhaul Gasket Set 5-87815035-0 5878150350 For ISUZU 4HK1 NPR NQR

The Engine Overhaul Gasket Set (GASKET KIT; ENG OVERHAUL) with OEM number 5-87815035-0 (also listed as 5878150350) is a verified OEM-grade complete gasket and seal kit for ISUZU 4HK1 diesel engines. As the foundation of any major engine rebuild or overhaul, this comprehensive kit contains all essential gaskets and seals required to restore the engine's sealing integrity, maintain proper compression, and prevent oil, coolant, and combustion leaks.

Manufactured to ISUZU OEM specifications, this gasket set is engineered to withstand the heavy-duty demands of commercial truck operation. Whether you are rebuilding an NPR, NQR, NQR75, FSR, or 700P truck engine, this kit guarantees precision fitment and long-lasting reliability for fleet, commercial, or workshop engine rebuild projects.

• OEM Specification — Verified by ISUZU OEM part numbers 5-87815035-0 and 5878150350
• Complete Engine Sealing Solution — Includes all essential gaskets, seals, and O-rings required for a full engine rebuild
• Premium Materials — Features VITON oil seals (front: 109x137x13, rear: 104x139x13) and a stainless steel cylinder head gasket for superior durability
• Precision Fitment — Guarantees accurate fit for ISUZU 4HK1 engines
• Net Weight — Approx. 1.95 kg
• H/S Code — 848490000

If your engine's gaskets and seals are failing, you may experience one or more of the following symptoms:

• Engine Oil Leakage: Oil spots or puddles forming under the vehicle — indicates degraded gaskets and seals
• Coolant Leakage or Loss: Unexplained drop in coolant level with visible external leaks — indicates failed coolant seals
• Loss of Engine Compression: Reduced engine power, hard starting, or rough running — indicates failed cylinder head gasket
• Oil Contamination: Milky or frothy appearance on the oil dipstick — indicates coolant mixing with engine oil
• Excessive Exhaust Smoke: White, blue, or black smoke from the exhaust — indicates improper sealing of combustion chambers
• External Fluid Leaks: Visible oil, coolant, or fuel seepage from various engine joints

Pre-Installation Checklist:

• This kit is designed for full engine rebuilds and major overhauls
• Verify engine code matches 4HK1 compatibility
• Clean all sealing surfaces thoroughly — any debris can cause premature gasket failure
• Use new cylinder head bolts as recommended by the workshop manual
• Refer to the ISUZU workshop manual for correct torque specifications and tightening sequences
• Inspect all engine components for wear — replace as necessary during the rebuild

Installation Guidelines (Reference ISUZU workshop manual):

1. Ensure the engine is completely disassembled and all components are cleaned
2. Remove all old gasket material from sealing surfaces using appropriate tools
3. Clean all sealing surfaces with appropriate solvent
4. CRITICAL: Install new gaskets and seals in the correct orientation as specified in the workshop manual
5. Follow the correct tightening sequence and torque specifications for each component
6. Reassemble the engine following the workshop manual procedures
7. Refill with fresh engine oil and coolant
8. Start the engine and check for leaks
9. Perform a break-in procedure as recommended by the workshop manual

Maintenance Schedule:

• Inspection: During routine maintenance or if fluid leaks / performance issues appear
• Replacement: Recommended during major engine overhauls or immediately if failure symptoms appear
• Note: This kit is ideal for complete engine overhauls, rebuilds, and maintenance

• Packaging: Each gasket kit is securely packed in protective packaging to prevent shipping damage
• Packing Quantity: 1 PCS
• Net Weight: Approx. 1.95 kg
• H/S Code: 848490000
• Suitable for: Wholesale distributors, engine rebuild shops, truck repair facilities, and fleet owners