20405536 Sealing Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta sealing ring used in pairs around the inlet-manifold or charge-air transfer tube. It seals the tube to the adjoining manifold or housing on TD520 and related D5 / D7 engines.

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-T
• Volvo Penta D5A-TA
• Volvo Penta TD420VE
• Volvo Penta TD520GE
• Volvo Penta TD520VE
• Volvo Penta TAD520GE
• Volvo Penta TAD520VE
• Volvo Penta TAD532GE EDC4
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TD, TAD, MD

⚙️ Key Features

• Pair-type sealing ring for an inlet or charge-air transfer tube
• Used around tube 20405616 on the TD520GE arrangement
• Suitable for boosted-air temperature and oil mist
• Maintains a pressure-tight intake path
• Should be replaced in matched pairs when the tube is removed
• Engine type: Volvo Penta 5- and 7-litre turbocharged industrial diesel
• Quantity varies by assembly, most commonly one

🔌 Function

Seals the transfer tube at both ends to prevent boost loss and unfiltered-air entry.

⚠️ Common Signs of Failure

• Boost leak or whistling
• Oil mist at a tube joint
• Dust tracks downstream of the air filter
• Seal hardening, splitting or displacement

🛠️ Service Notes

• Always fit a new sealing ring rather than reusing the old one — a ring that has been compressed once has taken a set and will not seal reliably a second time
• Clean the groove or seat and check it for scoring, corrosion and old sealant before fitting; a mark across the sealing face will leak however good the ring is
• Ease the ring into place without stretching, twisting or dragging it over sharp edges or threads, and check it is seated squarely all the way round before closing the joint
• Do not add sealant or jointing compound unless the workshop manual for your engine calls for it, and tighten the joint or union to the figure given in that manual
• Check the joint for weeping once the engine has been run up to temperature and allowed to cool, as many sealing rings only show a leak after a heat cycle

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20405536 → Supersedes 20515574

OEM / Related Numbers

• 20460334 earlier number superseded by this part
• 20515574 earlier number superseded by this part
• 20405616 - related inlet-manifold tube
• 20405535 - related charge-air adapter O-ring

📦 Condition

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