21277456 Cover | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta cover used in a cooling-system or seawater-pump assembly. It closes the component housing, supports the associated gasket or O-ring and protects the internal flow passage or rotating element.

🚤 Compatibility

Typically suits:

• Volvo Penta D11B2-A MP
• Volvo Penta D11A-C MP
• Volvo Penta D11A-D MP
• Volvo Penta D11A-E MP
• Volvo Penta D11A-C (IPS)

• Engine Family: D

⚙️ Key Features

• Genuine Volvo Penta cooling-system cover
• Machined sealing face and mounting pattern
• Protects internal cooling-system components
• Use the specified gasket, O-ring and fasteners
• Match pump/housing revision and engine serial
• Engine type: Volvo Penta marine diesel cooling system

🔌 Function

Closes the assigned cooling-system housing and maintains the sealed internal water passage.

⚠️ Common Signs of Failure

• Coolant or seawater leakage around the component
• Restricted flow, corrosion scale or internal blockage
• Pressure loss, aeration or repeated overheating alarms
• Visible pitting, cracking or damaged sealing surfaces

🛠️ Service Notes

• Clean both sealing faces back to clean metal and check the cover for distortion, cracks or pulled bolt holes before refitting — a warped flange will not seal even with a new gasket
• Where the joint uses a gasket, seal or O-ring, always fit a new one and seat it dry unless the workshop manual for your engine specifies a sealant; never try to make a poor joint tight with extra sealant
• Tighten the fasteners progressively and evenly, working out from the centre, to the figure given in the manual for your engine — pressed steel, alloy and plastic covers distort easily if pulled down hard or unevenly
• If the cover carries a shaft seal or bearing, support it square to the shaft as it goes on so the seal lip is not nicked or rolled over
• Check that any breather, drain or oil return passage in the cover is clear before final tightening, and look for leaks once the engine has been run up to temperature

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21277458 - associated seawater-pump cam in the D11 pump family
• 21277478 - associated cross-recessed screw used in the same service area

📦 Condition

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