# 21653647 Cap | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta D4 / D6 Charge-Air Cooler End Cap - Part Number: 21653647

  

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.

  

⚙️ 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

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21653647 (current OEM service number)

  

OEM / Related Numbers:

  

• VOE21653647

• VOL-21653647

  

Aftermarket / Verified Equivalents:

  

• Repower Marine: RM21653647

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D4 and D6 marine charge-air cooler systems

  

Typically suits:

  

• Engine models / systems:

• D4-180I-C / D / E / F

• D4-225A-C / D / E / F and D4-225I-C / D / E / F

• D4-260A / D / I-C / D / E / F

• D4-300A / D / I-A / C / D / E / F

• D6-280A / I-A / B / C / D / E

• D6-300A / I-F

• D6-310A / D / I-A / B / C / D / E

• D6-330A / D / I-B / C / D / E / F

• D6-350A-A / B

• D6-370A / D / I-A / B / C / D / E / F

  

• Engine Type: Turbocharged and charge-air-cooled marine diesel

• Fitment Note: Confirm cooler casting, cap side and sealing-ring size

  

🔌 Function

  

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

  

Common signs of failure:

  

• Coolant or seawater leakage

• Corrosion or cracking

• Damaged O-ring groove

• Restricted cooling-water flow

• Rising intake-air temperature

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 550.58 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 550.58 AUD | In stock |

## Images

- 21653647 Cap | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21653647-cap-genuine-volvo-penta)
> Updated: 2026-08-03