20459851 Valve Spring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta TAD420VE/TAD620VE Valve Spring - Part Number: 20459851

A genuine Volvo Penta valve spring used in the cylinder-head valve-return system. It is supplied as an individual service component under part number 20459851 and is intended to restore the original fit, sealing, alignment, retention or operating function of the specified assembly. This listing supplies the named part only; adjoining components shown in the engine diagram are serviced separately unless explicitly stated.

⚙️ Key Features

• Genuine Volvo Penta service component

• Designed for the cylinder-head valve-return system

• Manufactured to the specified OEM dimensions and material requirements

• Suitable for maintenance, repair or overhaul of the matching engine assembly

• Exact engine and serial-number confirmation is recommended before installation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20459851 - Current genuine Volvo Penta service reference

OEM / Related Numbers:

• 20459851 - Current genuine Volvo Penta service reference

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta TAD420VE industrial diesel engines

• Volvo Penta TAD620VE industrial diesel engines

• Shared D5/D7 cylinder-head, rocker and valve-cover service applications

Typically suits:

• Engine models:

• TAD420VE

• TAD620VE

• Engine Type: Volvo Penta D5/D7 industrial diesel engine family

• HP Range: Determined by the exact engine model and rating

• Year Range: Engine-generation and serial-number controlled

• Serial Applicability: Confirm the cylinder-head casting, valve-cover version and exact schematic position

🔌 Function

Returns the valve to its seat and maintains valve-train contact throughout the operating cycle.

Common signs of failure or reasons for replacement:

• Valve-train noise or valve float develops at higher engine speed

• The spring is cracked, distorted, corroded or shorter than specification

• The valve does not return firmly to its seat

• Compression and cylinder performance become inconsistent

• Spring pressure tests below the applicable service limit

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging