23526770 Piston Ring Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta standard-size piston-ring package for one cylinder of selected D8 generating-set and industrial engines. Six kits are required for a complete inline-six engine.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD840GE
• Volvo Penta TAD841-43GE
• Volvo Penta TAD552VE
• Volvo Penta TAD853VE
• Volvo Penta TAD851-53GE
• Volvo Penta TAD880-82GE
• Volvo Penta TAD880-84VE
• Volvo Penta TAD580-83VE
• Volvo Penta TAD570-72VE
• Volvo Penta TAD550-51VE
• Volvo Penta TAD540-42VE
• Volvo Penta TAD840-43VE
• Volvo Penta TAD850-52VE
• Volvo Penta TAD840GE-B
• Volvo Penta TADH880-82GE
• Volvo Penta TADH880-84VE

• Engine Family: TAD, TADH

⚙️ Key Features

• Genuine Volvo Penta D8 piston-ring kit
• Correct Volvo Penta part number 23526770
• Complete three-ring package for one piston
• Six kits are required for a complete engine
• Piston and liner tolerance class must be confirmed before installation
• Engine type: Volvo Penta D8 7.7L inline six-cylinder diesel

📋 Kit Contents

• 1 × upper compression ring - serviced under kit 23526770
• 1 × second compression ring - serviced under kit 23526770
• 1 × oil-control ring assembly - serviced under kit 23526770

🔌 Function

The compression rings seal combustion pressure and transfer heat to the liner, while the oil ring controls the lubricating-oil film on the cylinder wall.

⚠️ Common Signs of Failure

• Blue smoke and high oil consumption
• Broken, stuck or worn rings
• Scored liner or damaged piston grooves
• Incorrect ring set fitted to the piston revision

🛠️ Service Notes

• Check the end gap of each ring in the bore it will run in and compare it with the figure in the workshop manual for your engine; a worn or rebored cylinder changes it
• Fit the rings the right way up — where a face is marked or the section is stepped, that face goes towards the piston crown, and an oil control ring's expander must be fitted without overlapping its own ends
• Use a ring expander rather than levering rings on with a screwdriver, and open them only as far as they need to go; cast rings snap and the groove edges nick easily
• Stagger the ring gaps round the piston as the manual for your engine directs, so that no two gaps line up
• Oil the rings, bore and compressor lightly, enter the bore with a ring compressor, and never force the piston in — if it resists, back it out and find out why

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23526770 → Supersedes 23093056

OEM / Related Numbers

• 23093056 earlier number superseded by this part
• 23526777 class-0 liner kit
• 23526778 class-1 liner kit
• 23526780 class-0 D5 liner kit
• 23526781 class-1 D5 liner kit

Other-Brand OEM Numbers

• VOE23526770

📦 Condition

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