31258132 Valve Spring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve spring from the Engine group, weighing 0.023 kg and listed for 50 D series engine applications. It supersedes part number 8631656.

🚤 Compatibility

• Engine Family: D
• HP Range: 110-220 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.023 kg
• Supersedes 8631656
• 50 D series engine applications

🔌 Function

Closes the valve and holds it against its seat, following the cam profile without float.

⚠️ Common Signs of Failure

• Spring broken, usually at the end coil
• Free length or fitted load below specification
• Valve float or misfire at higher engine speeds
• Valve not seating fully, showing as compression loss
• Corrosion pitting on the spring surface

🛠️ Service Notes

• Measure free length and fitted load against specification — a tired spring looks perfect
• Renew springs as a set; if one has failed the others have done the same hours

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 31258132 → Supersedes 8631656

OEM / Related Numbers

• 8631656 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D3-220I-G, D3-140A-D, D3-170A-D, D3-200A-D, D3-220A-D, D3-140I-D, D3-140A-E, D3-170A-E, D3-200A-E, D3-220A-E, D3-140I-E, D3-140A-F, D3-170A-F, D3-200A-F, D3-220A-F, D3-140I-F, D3-140A-G, D3-170A-G, D3-200A-G, D3-220A-G, D3-140I-G, D3-110I-D, D3-150I-D, D3-170I-D, D3-200I-D, D3-220I-D, D3-110I-E, D3-150I-E, D3-170I-E, D3-200I-E, D3-220I-E, D3-110I-F, D3-150I-F, D3-170I-F, D3-200I-F, D3-220I-F, D3-110I-G, D3-150I-G, D3-170I-G, D3-200I-G, D3-110I-H, D3-140A-H, D3-170A-H, D3-200A-H, D3-220A-H, D3-150I-H, D3-170I-H, D3-200I-H, D3-220I-H, D3-140I-H