21687551 Volvo Penta Cooler End Cover | Genuine Used Part

🔧 Product Description

Genuine Volvo Penta Charge Air Cooler End Cover - Part Number: 21687551

A genuine used Volvo Penta charge-air-cooler end cover for selected D4 and D6 marine diesel engines.

The cover closes one end of the charge-air cooler and retains the cooler-core seals and seawater passage. It must remain dimensionally stable and corrosion-free to prevent seawater and boost-pressure leakage.

⚙️ Key Features

• Genuine Volvo Penta OEM charge-air-cooler end cover
• Correct Volvo Penta part number 21687551
• Used across a broad D4 and D6 common-rail diesel family
• Seals the charge-air-cooler water end and core
• Verified Repower Marine and Swedish Lorry Parts replacements available

🚤 Compatibility

Commonly used on

• Volvo Penta D4 and D6 charge-air cooler assemblies
• Common-rail marine diesel aftercooler seawater circuits

Typically suits

• Engine models:
• Volvo Penta D4-180I-C, D4-180I-D, D4-180I-E and D4-180I-F
• Volvo Penta D4-225A-C, D4-225A-D, D4-225A-E and D4-225A-F
• Volvo Penta D4-225I-C, D4-225I-D, D4-225I-E and D4-225I-F
• Volvo Penta D4-260A-C, D4-260A-D, D4-260A-E and D4-260A-F
• Volvo Penta D4-260D-C, D4-260D-D, D4-260D-E and D4-260D-F
• Volvo Penta D4-260I-C, D4-260I-D, D4-260I-E and D4-260I-F
• Volvo Penta D4-300A-A, D4-300A-C, D4-300A-D, D4-300A-E and D4-300A-F
• Volvo Penta D4-300D-A, D4-300D-C, D4-300D-D, D4-300D-E and D4-300D-F
• Volvo Penta D4-300I-A, D4-300I-C, D4-300I-D, D4-300I-E and D4-300I-F
• Volvo Penta D6-280A-A, D6-280A-B, D6-280A-C, D6-280A-D and D6-280A-E
• Volvo Penta D6-280I-A, D6-280I-B, D6-280I-C, D6-280I-D and D6-280I-E
• Volvo Penta D6-300A-F and D6-300I-F
• Volvo Penta D6-310A-A, D6-310A-B, D6-310A-C, D6-310A-D and D6-310A-E
• Volvo Penta D6-310D-B, D6-310D-C, D6-310D-D and D6-310D-E
• Volvo Penta D6-310I-A, D6-310I-B, D6-310I-C, D6-310I-D and D6-310I-E
• Volvo Penta D6-330A-B, D6-330A-C, D6-330A-D, D6-330A-E and D6-330A-F
• Volvo Penta D6-330D-B, D6-330D-C, D6-330D-D, D6-330D-E and D6-330D-F
• Volvo Penta D6-330I-B, D6-330I-C, D6-330I-D, D6-330I-E and D6-330I-F
• Volvo Penta D6-350A-A and D6-350A-B
• Volvo Penta D6-370A-B, D6-370A-C, D6-370A-D, D6-370A-E and D6-370A-F
• Volvo Penta D6-370D-A, D6-370D-B, D6-370D-C, D6-370D-D, D6-370D-E and D6-370D-F
• Volvo Penta D6-370I-A, D6-370I-B, D6-370I-C, D6-370I-D, D6-370I-E and D6-370I-F
• HP Range: 180HP - 370HP
• Engine Type: Volvo Penta D4 / D6 turbocharged common-rail marine diesel
• Year Range: Approximately mid-2000s - late-2010s

🔌 Function

The end cover seals the charge-air-cooler core and directs seawater through the cooler passages. The cooler removes heat from compressed intake air before it enters the engine.

⚠️ Common Signs of Failure

• Cover is cracked, warped or corroded
• Seawater leaks externally from the cooler end
• Internal leakage allows seawater into the air side
• Seal grooves or bolt holes are damaged
• Boost pressure is lost because the cooler end does not seal

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21687551 current Volvo Penta OEM service reference

OEM / Related Numbers

• 21687551
• VOP21687551
• Volvo Penta charge-air-cooler / aftercooler end cap

Aftermarket / Verified Equivalents

• Repower Marine: RM21687551
• Swedish Lorry Parts: CAP-551

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated