20459326 Inlet Valve | Genuine Volvo Penta Part

🔧 Product Description

A genuine cylinder-head inlet valve for TAD1240GE engines from serial number 2012303404. It controls the intake-air path into the cylinder and must seal correctly against the matching seat during compression and combustion.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD1240VE
• Volvo Penta TAD1241GE
• Volvo Penta TAD1242GE
• Volvo Penta TAD1250VE
• Volvo Penta TAD1251VE
• Volvo Penta TAD1252VE
• Volvo Penta TAD1250-52VE
• Volvo Penta TAD1240GE
• Volvo Penta TAD1241VE
• Volvo Penta TAD1242VE
• Volvo Penta TAD1241-42VE

• Engine Family: TWD, TAD
• Serial Range: SN2012303404-

⚙️ Key Features

• Designed for the cylinder-head valve-train assembly
• Catalogued for TAD1240GE engines from SN2012303404
• Engine type: Volvo Penta D12 inline-six industrial diesel

🔌 Function

Opens to admit charge air into the cylinder and closes to seal the combustion chamber.

⚠️ Common Signs of Failure

• Compression falls in the affected cylinder
• The engine becomes difficult to start or produces reduced power
• Air leakage is detected during cylinder or valve testing
• The valve face, margin or stem is burnt, bent or excessively worn
• Abnormal valve-train noise or incorrect valve clearance develops

🛠️ Service Notes

• Keep valves in order and fit each one to the seat it is lapped to; a new valve must be lapped in until a continuous, even contact band shows right round
• Check the guide for wear before fitting a new valve — a good valve in a worn guide will not seat or seal for long
• Clean the deposits from the port and seat, wash every trace of lapping paste out of the head, and lubricate the stem with clean engine oil on assembly
• Fit new stem seals and check installed spring height and valve recess against the figures in the workshop manual for your engine
• Set the valve clearances on assembly and re-check them after the first running period, following the procedure for your engine

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20459326 → Supersedes 20441645

OEM / Related Numbers

• 20441645 earlier number superseded by this part
• 20459326 - Inlet valve, from SN2012303404
• 3169490 - Earlier or alternate inlet-valve reference
• 859171 - Related valve stem seal
• 3183211 - Related valve springs
• 21310068 - Related valve springs
• 20441486 - Related exhaust valve
• 20742698 - Related rocker arms
• 20742703 - Related rocker arms
• 3183207 - Related valve bridge

Other-Brand OEM Numbers

• TRW Engine Components: 48327 - inlet-valve cross-reference

Aftermarket / Verified Equivalents

• SLP: ILV-326
• TBt Parts: 85-5144

📦 Condition

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