20521400 Piston Pin | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta piston pin is an OEM service component used in the Piston / Connecting-Rod Piston Pin. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta 16-litre TAD16/TWD16 and shared Volvo D16 diesel application. Technical identification: Fully floating piston pin joining the piston to the connecting-rod small end; supplied as an individual pin and also used in Volvo 40005838 overhaul-kit configurations. In service, it forms the articulated connection between the piston and connecting rod while carrying alternating combustion and inertia loads. Selection must be confirmed by OEM part number 20521400, the exact model/product number, serial number and installed assembly configuration.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1650VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta OEM piston pin
• OEM part number 20521400
• Technical distinction: Fully floating piston pin joining the piston to the connecting-rod small end; supplied as an individual pin and also used in Volvo 40005838 overhaul-kit configurations
• Measure pin, piston-bore and connecting-rod clearances, lubricate during assembly and renew retaining components where required.

🔌 Function

Forms the articulated connection between the piston and connecting rod while carrying alternating combustion and inertia loads. Measure pin, piston-bore and connecting-rod clearances, lubricate during assembly and renew retaining components where required.

⚠️ Common Signs of Failure

• Piston slap or metallic knocking that changes with load
• Excessive pin-to-bore or small-end clearance
• Scoring, heat discolouration or material transfer on the pin
• Metal particles in the oil or accelerated piston/rod wear
• Cracked piston boss or connecting-rod small-end damage

🛠️ Service Notes

• Measure before assembling: pin, piston bore and rod bush must all be checked against the wear limits in the workshop manual for your engine, and a pin that has picked up or lost its finish is scrap
• Assemble spotlessly clean and generously oiled with clean engine oil or the specified assembly lubricant; a dry pin galls on the first turn of the engine
• Confirm piston and rod are the correct way round and correctly paired before the pin goes in
• Where the manual specifies a warm fit, warm the piston evenly by the method it sets out and push the pin home in one movement — never drive a pin in with a hammer
• Fit new circlips or retaining rings, compress them no more than needed to enter the bore, seat them squarely in the groove, and check each is fully home and cannot be rotated by finger pressure

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 40005838 overhaul kit (includes piston pin 20521400)

Aftermarket / Verified Equivalents

• SRP: PP-21400

📦 Condition

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