820566 Pressure Cap | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta pressure cap from the Cooling System group, listed for 6 applications across the D, TD, TMD and MD series engines. Its published weight of 0.98 kg is far higher than a cap of this kind would normally be, so treat that figure with caution and order by part number against your engine.

🚤 Compatibility

Typically suits:

• Volvo Penta D70CHC
• Volvo Penta TD70CHC
• Volvo Penta TMD70C
• Volvo Penta MD70B
• Volvo Penta TMD70B
• Volvo Penta MD70C

• Engine Family: D, TD, TMD, MD

⚙️ Key Features

• 6 applications across D, TD, TMD and MD engines
• Cooling System group
• Published weight of 0.98 kg looks too high to identify the part by
• Order by part number

🔌 Function

Holds the cooling system at its designed pressure, raising the coolant's boiling point, and relieves pressure or admits coolant back as the system heats and cools.

⚠️ Common Signs of Failure

• Coolant loss and steam or overflow when the engine is hot
• Header tank hose collapsing as the engine cools
• Overheating that clears when the cap is renewed
• Seal in the cap hardened, split or the spring weak
• Coolant crusting or staining around the filler neck

🛠️ Service Notes

• Gasket 820569 at 0.023 kg is listed against the same D, TD, TMD and MD engine families, so consider renewing the joint at the same time
• Never open a pressure cap on a hot engine - let it cool right down first
• Have the cap's relief pressure checked, or simply renew it, before chasing an overheating fault further

📦 Condition

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