21318269 Piston Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta standard piston kit for one cylinder in selected D2-50F and D2-55 marine diesels. The Volvo crankshaft parts list for your engine lists the piston ring set, gudgeon pin and retaining clips separately, so those components should not be assumed to be included with piston kit 21318269.

🚤 Compatibility

Typically suits:

• Volvo Penta D2-55
• Volvo Penta D2-55B
• Volvo Penta D2-55C
• Volvo Penta D2-55D
• Volvo Penta D2-55E
• Volvo Penta D2-55F
• Volvo Penta D2-50F

• Engine Family: D
• HP Range: 50-55 HP
• Year Range: Approximately early 2000s onward

⚙️ Key Features

• Genuine Volvo Penta OEM standard piston kit
• Correct Volvo Penta part number 21318269
• Used on D2-50F and D2-55 engine families
• Four piston kits required for a complete engine
• Related rings, pin and clips separately serviceable
• 4 used per assembly

📋 Kit Contents

• Piston assembly - part number 21318269 - quantity 1
• Piston ring kit 3583693, gudgeon pin 3580550 and two lock rings 3580551 are separate and are not included unless the sealed Volvo package specifically states otherwise

🔌 Function

The piston receives combustion pressure and transfers force to the connecting rod while supporting the ring pack and controlling combustion-chamber geometry.

⚠️ Common Signs of Failure

• Piston crown, skirt or ring-land damage
• Excessive piston clearance
• Gudgeon-pin bore wear
• Low compression after piston damage
• Ring, pin or clips incorrectly assumed to be included

🛠️ Service Notes

• Check the bore or liner condition and measure piston-to-bore clearance against the figures in the workshop manual for your engine before assembly; a new piston in a worn bore will not fix oil consumption
• Observe the piston's orientation mark and fit it the specified way round in the bore, with the connecting rod the correct way about
• Fit the rings the right way up where they are marked, check ring gap and ring-to-groove fit, and stagger the gaps as the manual sets out, then oil the piston, rings and bore and use a proper ring compressor — never lever a piston into a bore, and never reuse old rings on a new piston
• Use new gudgeon pin retainers and new connecting rod bolts or nuts where the manual calls for them, and tighten to its figures and method
• Turn the engine over by hand as you build to confirm free rotation, and run the engine in as the manual directs before applying full load, rather than loading fresh rings hard from cold

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21318269 → Supersedes 3583692

OEM / Related Numbers

• 3583692 earlier number superseded by this part
• 3583693 separate piston-ring kit
• 3580550 separate gudgeon pin
• 3580551 separate lock ring - quantity 2
• 3583683 related connecting rod

Other-Brand OEM Numbers

• Kolbenschmidt: 40253600
• Mahle: 043 PI 00133 000

📦 Condition

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