21576287 Cylinder Head | Genuine Volvo Penta Part

🔧 Product Description

Heavy machined cylinder-head assembly for Volvo Penta D9A2 marine and generating-set engines. It contains the valve seats, injector bores, combustion-sealing face and internal oil and coolant passages required by the D9 valvetrain.

⚙️ Key Features

• Full D9A2 marine engine-family coverage
• Approximately 187.5 kg
• Precision injector, valve and manifold interfaces
• Suitable for MG, MH and MP installations
• Serial-specific equipment level must be checked
• Engine type: 9.4-litre inline-six turbocharged diesel

🔌 Function

Seals the cylinders and supports the valves, injectors and gas-exchange passages while circulating coolant and lubricating oil.

⚠️ Common Signs of Failure

• Low compression or combustion leakage
• Coolant loss or pressure in the expansion tank
• Cracking around valve seats or injector sleeves
• Warped gasket surface or repeated head-gasket failure

🛠️ Service Notes

• Check the head for cracks and check the head and block faces for flatness with a straight edge before assembly, and have any doubt about the face or the valve seats resolved before the gasket goes on
• Clean the gasket faces with care and without scoring them — do not attack an aluminium face with abrasive discs or scrapers, and keep debris out of the bores, coolant passages and bolt holes
• Always use a new head gasket, and tighten in the stages, sequence and torque-plus-angle steps given in the workshop manual for your engine, with the threads and mating faces clean and lubricated exactly as that manual specifies
• Head bolts on modern engines are angle-tightened and stretch permanently, so renew them wherever the manual calls for it rather than reusing them
• Refill and bleed the cooling system properly, then run the engine and carry out any retightening or valve clearance recheck the manual requires after the first running period

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE21576287

Aftermarket / Verified Equivalents

• Approximate component weight: 187.5 kg

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging