21451746 Pipe | Genuine Volvo Penta Part

🔧 Product Description

A rigid pipe used in the supercharger inlet or outlet system on selected Volvo Penta marine engines. It forms part of the air path around supercharger 21145185.

🚤 Compatibility

Typically suits:

• Volvo Penta D11C2-A MP
• Volvo Penta D11C4-A MP
• Volvo Penta D11B4-A MP
• Volvo Penta D11B2-A MP

• Engine Family: D

⚙️ Key Features

• Genuine Volvo Penta supercharger pipe
• Designed for pressurised intake-air service
• Correct factory bends and mounting points
• Used with the original supercharger hose and bracket
• Maintains unrestricted airflow
• Engine type: Turbocharged and supercharged Volvo Penta marine diesel

🔌 Function

Carries intake air through the supercharger circuit.

⚠️ Common Signs of Failure

• Boost leakage or hissing
• Oil mist around a joint
• Cracked pipe or mounting bracket
• Increased black exhaust smoke

🛠️ 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

• 21145185 - supercharger
• 22003447 - air inlet
• 21621971 - air outlet
• 21308577 - gasket
• 21211439 - bracket
• 21832376 - hose
• 981021 - V-ribbed belt

📦 Condition

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