21653647 Cap | Genuine Volvo Penta Part

🔧 Product Description

Removable end cap used on Volvo Penta D4 and D6 charge-air coolers. It closes the cooler housing, directs cooling-water flow through the core and provides the original sealing and hose interfaces.

🚤 Compatibility

• Engine Family: D
• HP Range: 280-380 HP

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta charge-air cooler cap
• Broad D4 and D6 C-F-series fitment
• Maintains cooler water-path sealing
• Original hose and O-ring geometry
• Documented Repower Marine equivalent
• Engine type: Turbocharged and charge-air-cooled marine diesel

🔌 Function

Seals the end of the charge-air cooler and directs cooling water through the cooler core.

⚠️ Common Signs of Failure

• Damaged O-ring groove
• Restricted cooling-water flow
• Rising intake-air temperature

🛠️ Service Notes

• Clean and inspect the seating face on the housing as well as the cap — most leaks past a cap are the seat or the seal rather than the cap body
• Renew any separate O-ring or gasket that goes with the cap, and lubricate rubber seals lightly with clean oil or grease so they slide home instead of rolling or tearing
• Do not over-tighten a cap into a plastic or aluminium housing; it seals on its gasket or O-ring, not on force, and stripped threads mean a much bigger repair
• Where a cap blanks a port during a repair, keep it fitted right up to the moment of assembly so nothing enters the opening
• Check the cap is fully home and that any retaining clip, lanyard or locking tab is secure before returning the boat to service

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21653647 → Supersedes 3889405 → Supersedes 3583637

OEM / Related Numbers

• 3889405 earlier number superseded by this part
• 3583637 earlier number superseded by this part

Other-Brand OEM Numbers

• VOE21653647

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-370A-C, D6-350A-A, D6-350A-B, D6-330A-D, D6-330D-E, D6-370D-E, D6-370D-B, D6-330D-B, D6-330A-F, D6-370A-F, D6-370D-A, D6-330D-C, D6-330A-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-330D-F, D6-370A-D, D6-330A-E, D6-370A-E, D6-370D-F, D6-330I-D, D6-310I-B, D6-280I-B, D6-280I-C, D6-280I-D, D6-280I-E, D6-310I-D, D6-310I-E, D6-280I-A, D6-310I-A, D6-300A-F, D6-300D-F, D6-300I-F, D6-310D-B, D6-310D-D, D6-310D-C, D6-310D-E, D6-370I-A, D6-370I-B, D6-330I-B, D6-330I-C, D6-370I-C, D6-370I-D, D6-310A-B, D6-280A-C, D6-310A-C, D6-310A-A, D6-280A-D, D6-310A-D, D6-280A-E, D6-310A-E, D6-310I-C, D6-280A-A, D6-280A-B, D6-340I-G, D6-380I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-300I-G, D6-330I-F, D6-370I-F, D6-330I-E, D6-370I-E, D6-330A-B, D6-370A-B