875579 Piston | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta piston in the 0.75 mm oversize grade, weighing 1.207 kg and listed for 4 applications across MD and AQD series engines. It supersedes part number 875497. The 0.75 mm oversize marking is what decides the order; the other oversize piston in this run, 875546, is the 0.5 mm grade for MD engines only. Order by the measured bore and the oversize marking, never by mass.

🚤 Compatibility

Typically suits:

• Volvo Penta MD1B
• Volvo Penta MD2B
• Volvo Penta MD3B
• Volvo Penta AQD2B

• Engine Family: MD, AQD

⚙️ Key Features

• 0.75 mm oversize grade
• 1.207 kg
• Listed for 4 applications across MD and AQD series engines
• Supersedes 875497
• 0.5 mm oversize piston in this run is 875546
• 0.75mm (Volvo assembly listing)
• Quantity varies by assembly, most commonly two

🔌 Function

Transfers combustion pressure to the connecting rod and carries the rings that seal the 0.75 mm oversize bore.

⚠️ Common Signs of Failure

• Piston slap from cold, easing as the engine warms
• Blue smoke and oil consumption climbing
• Skirt scuffed or picked up down one side
• Ring lands broken or the crown eroded or cracked
• Piston-to-bore clearance measuring beyond limits

🛠️ Service Notes

• Measure the bore before ordering — this piston suits a bore taken out 0.75 mm and will be loose in a 0.5 mm one
• Fit the matching oversize ring set and check the end gaps in the bore before assembly
• Observe the fitting direction marked on the crown

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 875579 → Supersedes 875497

OEM / Related Numbers

• 875497 earlier number superseded by this part

📦 Condition

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