23526778 Cylinder Liner Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta matched one-cylinder piston and wet-liner package for selected D8 engines, classified as tolerance class 1. The piston and liner class must match the engine's documented cylinder classification. Six kits are required for a complete inline-six engine.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD570-72VE
• Volvo Penta TAD570-71VE-B
• Volvo Penta TAD870-73VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta D8 piston and liner kit
• Correct Volvo Penta part number 23526778
• Matched tolerance class 1
• Complete one-cylinder package
• Six kits are required for a complete D8 engine
• Engine type: Volvo Penta D8 7.7L inline six-cylinder diesel
• Quantity varies by assembly, most commonly four

📋 Kit Contents

• 1 × matched tolerance-class-1 piston - serviced within kit 23526778
• 1 × matched tolerance-class-1 wet cylinder liner - serviced within kit 23526778
• 1 × piston-ring kit - 22222394
• 1 × gudgeon pin - 22203232
• 2 × piston-pin snap ring - 21230282
• 1 × matched cylinder-liner sealing package - serviced within kit 23526778

🔌 Function

The liner provides the replaceable cylinder bore, while the matched piston and rings seal combustion, control oil and transmit force to the connecting rod.

⚠️ Common Signs of Failure

• Low compression, blow-by or oil consumption
• Liner cavitation, scoring or cracking
• Piston crown, skirt or ring-land damage
• Coolant leakage past liner seals
• Piston and liner tolerance classes are mismatched

🛠️ Service Notes

• Clean the liner seats and the O-ring grooves in the block thoroughly and check them for corrosion pitting or fretting before any liner goes in — a poor seat is the usual cause of a repeat failure
• Measure liner protrusion above the block face dry, without the O-rings fitted, taking readings at several points around each liner and comparing them with the figures in the workshop manual for your engine — and do not try to correct insufficient protrusion by stacking extra rings or shims under the liner flange
• Keep each liner with its own bore position once measured, and fit the O-rings in the order and orientation specified, lubricated as the manual directs
• Fit the liners with an appropriate press or drawing arrangement so they go in square, never by hammering
• Protect the finished bores from rust and knocks until the pistons go in, and never run a new liner against worn or reused rings

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23526778 → Supersedes 22953704 → Supersedes 21908091

OEM / Related Numbers

• 22953704 earlier number superseded by this part
• 21908091 earlier number superseded by this part
• 22222394 related reference
• 22203232 related reference
• 21230282 related reference

Other-Brand OEM Numbers

• VOE23526778
• Kolbenschmidt: 41263960 application-matched piston / liner kit; verify class-1 specification

📦 Condition

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