21757071 Valve Spring | Genuine Volvo Penta Part

🔧 Product Description

Cylinder-head valve spring used for the inlet and exhaust valves on Volvo Penta D8 marine and TAD8 industrial engines. Twenty-four springs are normally used on a complete six-cylinder, four-valve-per-cylinder engine.

🚤 Compatibility

• Engine Family: TAD, D, TADH

Full model list at the end of this description.

⚙️ Key Features

• Valve spring from the Engine group
• 0.068 kg
• Listed for 27 applications across TAD, D and TADH series engines

🔌 Function

Closes the inlet or exhaust valve and maintains contact between the valvetrain components.

⚠️ Common Signs of Failure

• Reduced spring force
• Broken coil
• Valve float at high speed
• Uneven valve clearance
• Misfire or low compression

🛠️ Service Notes

• Replace springs as a full set rather than singly, so that closing force stays even across the head
• Check the valve stem seal and the collets while the spring is off, and renew the seal at the same time

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE21757071

Aftermarket / Verified Equivalents

• Inlet valve: 21528642
• Marine inlet valve: 21614038 → 23038919
• Exhaust valve: 21528644
• Exhaust valve: 21528645

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
• Volvo Penta TAD840GE, TAD840-43VE, TAD840GE-B
• Volvo Penta TAD570-72VE, TAD570-71VE-B
• Volvo Penta TAD880-82GE, TAD880-84VE
• Volvo Penta TADH880-82GE, TADH880-84VE
• Volvo Penta TAD540-42VE
• Volvo Penta TAD550-51VE
• Volvo Penta TAD552VE
• Volvo Penta TAD580-83VE
• Volvo Penta TAD841-43GE
• Volvo Penta TAD850-52VE
• Volvo Penta TAD851-53GE
• Volvo Penta TAD852VE-B
• Volvo Penta TAD853VE
• Volvo Penta TAD870-73VE