21504807 Pipe | Genuine Volvo Penta Part

🔧 Product Description

A formed coolant pipe used in the expansion-tank circuit of the Volvo Penta D13B-E MG (FE) cooling system.

🚤 Compatibility

Typically suits:

• Volvo Penta D13C3-B MH
• Volvo Penta D13C1-B MH
• Volvo Penta D13B-E MG
• Volvo Penta D13B-E MG (FE)
• Volvo Penta D13B-E MH
• Volvo Penta D13B-E MH (FE)
• Volvo Penta D13B-N MH
• Volvo Penta D13B-N MH (FE)
• Volvo Penta D13C1-A MH
• Volvo Penta D13C1-B MG
• Volvo Penta D13C3-B MG
• Volvo Penta D13C1-A MG

• Engine Family: D

⚙️ Key Features

• Genuine Volvo Penta expansion-tank pipe
• Works with air vent pipe 21505623
• Compatible with the original tank, sensor and pressure-cap arrangement
• Engine type: D13 inline-six turbocharged marine generating-set diesel

🔌 Function

Carries coolant between the engine cooling circuit and the expansion tank.

⚠️ Common Signs of Failure

• Cracking near a support or union
• Falling coolant level

🛠️ Service Notes

• Offer the pipe up and check it reaches both connections freely before you tighten anything — a rigid pipe pulled into place is a pipe left under permanent strain, and strained pipes crack at the fittings in service
• Renew the sealing washers, O-rings or union seals that go with the pipe rather than reusing the old ones, and make sure the seats, faces and threads are clean
• Keep the ends capped while you work and blow or flush a pipe through before fitting; anything left inside goes straight into the oil, fuel or coolant system
• Tighten unions and banjo bolts evenly to the figures in the workshop manual for your engine — overtightening distorts the seat and starts the leak you were trying to cure
• Refit every clip and support bracket in its original place and keep the pipe clear of hot or moving parts so it cannot chafe or be shaken to failure

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21505623 - air vent pipe
• 21366063 - related pipe
• 21381313 - water pipe
• 3885197, 21505289, 21920925, 21920930, 23127056 and 23360152 - expansion-tank references
• 3588990, 21416784 and 21872119 - level sensors
• 1674083 and 23321023 - pressure caps

📦 Condition

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