861955 Piston Ring Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta piston ring kit in the 0.25 mm oversize, from the Engine group, weighing 0.037 kg and listed for 8 applications on MD series engines. The 0.

🚤 Compatibility

Typically suits:

• Volvo Penta MD2010
• Volvo Penta MD2010B
• Volvo Penta MD2010-C
• Volvo Penta MD2010-D
• Volvo Penta MD2020
• Volvo Penta MD2020B
• Volvo Penta MD2020-C
• Volvo Penta MD2020-D

• Engine Family: MD

⚙️ Key Features

• 0.25 mm oversize
• 0.037 kg
• 8 applications on MD series engines
• 0.50 mm oversize version is kit 861956
• 0.25mm (Volvo assembly listing)
• Quantity varies by assembly, most commonly three

🔌 Function

Seals the combustion chamber against the cylinder wall, meters and scrapes oil off the bore, and carries heat out of the piston crown into the liner.

⚠️ Common Signs of Failure

• Blue smoke from the exhaust, worst on overrun and when idling after a long run
• Oil consumption climbing between services with no external leak to account for it
• Crankcase pressure rising, or oil mist pushed out of the breather
• Compression down on one or more cylinders and not recovering with oil in the bore
• Rings found gummed in their grooves, broken, or with the gaps worn open on strip-down

🛠️ Service Notes

• Measure the bore before ordering, as a 0.25 mm kit will not seal a bore honed to the 0.50 mm step
• Check each ring's gap in its own bore before assembly and stagger the gaps as the workshop manual specifies
• Inspect the piston pin and small end while the piston is out rather than reringing over worn parts

📦 Condition

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