23558933 Cylinder Liner Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta matched piston and 131mm cylinder-liner package for one cylinder of TAD1250VE, TAD1251VE and TAD1252VE engines. Six kits are required for a complete inline-six engine.

⚙️ Key Features

• Genuine Volvo Penta D12 one-cylinder piston and liner kit
• Correct Volvo Penta part number 23558933
• Nominal cylinder bore 131mm
• Six kits are required for a complete engine
• Engine type: Volvo Penta D12 12.1L inline six-cylinder industrial diesel

📋 Kit Contents

• 1 × matched standard piston - serviced within kit 23558933
• 1 × 131mm cylinder liner - serviced within kit 23558933
• 1 × matched piston-ring set - serviced within kit 23558933
• 1 × cylinder-liner sealing-ring package - serviced within kit 23558933
• 1 × gudgeon pin and retaining components - supplied within the OEM kit where specified by engine build

🔌 Function

The liner provides the replaceable cylinder bore, while the piston and rings seal combustion and transmit force to the connecting rod. The liner seals prevent coolant and crankcase-oil cross-contamination.

⚠️ Common Signs of Failure

• Scored, cracked or cavitated liner
• Piston crown, skirt or ring-land damage
• Coolant leakage past the liner seals
• Liner protrusion or piston clearance is outside specification

🛠️ 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

• 23558933 → Supersedes 20820358

OEM / Related Numbers

• 20820358 earlier number superseded by this part
• 20515059 related reference
• 20531592 related reference
• 276921 related reference
• 85101452 related reference
• 85103175 related reference

Other-Brand OEM Numbers

• VOE23558933
• Kolbenschmidt: 40338960
• Kolbenschmidt components: piston 40338600, liner 89593110 and liner-seal set 50006667
• MAHLE: 0385690

Aftermarket / Verified Equivalents

• ENGITECH: ENT056020 STD
• ENGITECH components: piston ENT054000 STD, ring set ENT044019 STD and liner 51-06083-000
• OE Germany: 030329D12000
• MEC-DIESEL: MEC793200
• Olsson Parts: 55400
• NÜRAL: 89-123200-10

📦 Condition

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