20405616 Plug | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta inlet-manifold transfer tube used with two sealing rings 20405536 on the TD520GE. The same tube is retained within the TAD532GE charge-air cooler and radiator installation, where it forms part of the sealed charge-air path.

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-TA
• Volvo Penta TD420VE
• Volvo Penta TD520GE
• Volvo Penta TAD532GE EDC4
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TD, TAD, MD

⚙️ Key Features

• Rigid charge-air transfer tube
• Used in the TD520GE inlet-manifold assembly
• Sealed by two rings 20405536
• Also used in the TAD532GE charge-air cooler installation
• Correct tube routing and end dimensions must match the original
• Engine type: Volvo Penta 5-litre industrial diesel

🔌 Function

Transfers compressed intake air through the sealed connection between the charge-air system and inlet manifold.

⚠️ Common Signs of Failure

• Boost-air leakage at either tube end
• Oil mist or dust tracks around the joint
• Tube corrosion, cracking or distortion
• Damaged or displaced sealing rings
• Reduced power and increased black smoke from boost loss

🛠️ Service Notes

• Clean the threads and the seating face before fitting, and make sure the opening itself is clear of old sealant, swarf and corrosion
• Renew the sealing washer or O-ring where one is fitted rather than reusing a flattened one, and only use thread sealant where the workshop manual for your engine calls for it
• Tighten to the figure given in the workshop manual for your engine — plugs in aluminium and other soft castings strip easily, and a plug pulled up hard to cure a leak usually distorts the seat and makes it worse
• Where the plug closes an oil, fuel or coolant passage, run the engine up to temperature afterwards and check the joint under pressure before signing the job off
• Keep removed plugs paired with the holes they came out of during a strip-down — plugs of very similar appearance often differ in thread, reach or sealing type

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20405536 - pair of sealing rings
• 20735825 - TD520GE charge-air pipe
• 20412291 - related coolant pipes in cooling arrangements
• 20405657 - related coolant pipes in cooling arrangements

📦 Condition

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