21618587 Cylinder Head | Genuine Volvo Penta Part

🔧 Product Description

A complete cylinder-head assembly for Volvo Penta TAD420VE industrial diesel engines. It forms the combustion chambers and carries the valves, valve seats, guides and coolant passages.

🚤 Compatibility

Typically suits:

• Volvo Penta TD420VE
• Volvo Penta TAD620VE
• Volvo Penta TAD420VE

• Engine Family: TD, TAD

⚙️ Key Features

• TAD420VE cylinder-head application
• Precision-machined combustion and gasket surfaces
• Supports the inlet and exhaust valve train
• Integrated coolant and lubricating-oil passages
• Requires correct head gasket, fastener sequence and installed-height checks

🔌 Function

The cylinder head closes the cylinders, forms the combustion chambers and controls intake, exhaust, coolant and oil flow through the top of the engine.

⚠️ Common Signs of Failure

• Coolant pressurisation or loss
• Oil and coolant contamination
• Cracks between valve seats or coolant passages
• Warped gasket face
• Valve-seat recession or leakage

🛠️ 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

OEM Supersession Chain

• 21618587 → Supersedes 20526210

OEM / Related Numbers

• 20526210 earlier number superseded by this part

📦 Condition

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