21139808 Air Vent Pipe | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Cooling-System Air Vent Pipe - Part Number: 21139808

Brand-new genuine Volvo Penta formed air-vent pipe for the D13B marine cooling system. The small-bore line continuously carries trapped air and vapour from high points in the engine cooling circuit to the expansion tank.

⚙️ Key Features

• Factory-formed deaeration line

• Maintains continuous bleed flow to the expansion tank

• Correct routing around D13B engine components

• Coolant- and temperature-resistant metal construction

• Pipe only; seals, clamps and tank fittings are separate

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21139808 - Current OEM reference

OEM / Related Numbers:

• Volvo Penta 21139808

• VOE21139808

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• D13B marine cooling-system deaeration circuit

Typically suits:

• Engine / drive models:

• D13B-A MP

• D13B-C MP

• D13B-G MP

• D13B-H MP

• D13B-K MP

• D13B-L MP

• Engine Type: Volvo Penta D13 marine diesel

• Year / Generation: D13B marine propulsion generation

🔌 Function

Purges trapped air from the cooling circuit and returns it to the expansion tank to prevent local hot spots and unstable coolant circulation.

Common signs of failure:

• Coolant seepage at a union

• Blocked vent line causing air pockets

• Erratic coolant level or temperature

• Vibration crack in the pipe

• Corrosion or scale restricting the small internal passage

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging