8981706190 cylinder head assembly for ISUZU engine spare part

8981706190 cylinder head assembly for ISUZU engine spare part Featured Image
  • 8981706190 cylinder head assembly for ISUZU engine spare part
  • 8981706190 cylinder head assembly for ISUZU engine spare part
  • 8981706190 cylinder head assembly for ISUZU engine spare part
  • 8981706190 cylinder head assembly for ISUZU engine spare part

Short Description:

Complete pre-assembled cylinder head for Isuzu 4HK1 engine overhaul, fitted with valve assemblies, integrates intake/exhaust ports, water and oil passages, seals combustion chamber and ensures stable valve operation.

Product Detail

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description

The cylinder head assembly is the core upper component of diesel engine, integrated with valves, valve springs, valve seats and guides. It seals the top of cylinder to form combustion chamber, arranges intake ducts, exhaust ducts, cooling water passages and lubricating oil passages, and cooperates with injectors to realize combustion and power output. Warped deck surface, poor valve sealing, casting porosity and water jacket cracks will lead to blown head gasket, mixing of oil and coolant, air leakage, low cylinder pressure, abnormal exhaust and power loss. In severe cases, coolant entering cylinder may cause catastrophic engine damage.

Part No.: 8981706190
Part Name: cylinder head assembly
Matching Engine: Isuzu 4HK1
Installation Position: Upper part of engine cylinder
Matching Parts: head gasket, valve oil seal, cylinder head bolts selected as overhaul set on demand

Application Scenarios

Fit for Isuzu 4HK1 series engines, compatible with Hitachi ZX200-3, ZX240-5A, ZX240-5B excavators and Isuzu NPR/NQR medium trucks. Suitable for heavy-duty mining, earthmoving and long-distance transportation conditions. Used to replace cracked, warped or severely valve-damaged old cylinder head assemblies.

FAQ 

Q: Can a slightly distorted cylinder head be reused after deck resurfacing?
A: Machining repair is acceptable within OEM allowable material removal limit. Replace assembly if removal exceeds limit or hidden cracks exist.

Q: Why is it recommended to replace cylinder head bolts together with the new cylinder head?
A: Cylinder head bolts are torque-to-yield fasteners. Metal fatigue occurs after stretching, and reuse may result in bolt breakage and blown gasket.

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