21418343 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D9 Intake Valve Seat - Part Number: 21418343

Replaceable hardened intake-valve seat insert for Volvo Penta D9 cylinder heads. It provides the precision sealing and heat-transfer surface for the intake valve and is used across D9A2 marine and TAD9 industrial engine variants.

⚙️ Key Features

• Genuine Volvo Penta intake valve-seat insert

• Hardened seat for D9 cylinder heads

• Supersedes earlier Volvo reference 20555102

• Requires precision machining and installed-height control

• Documented SLP replacement available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21418343 → Supersedes 20555102

• Related earlier Volvo reference: 1556148

OEM / Related Numbers:

• Use with the correct intake valve, guide and cylinder-head specification

• 21418352 - corresponding exhaust-valve seat; not interchangeable

Aftermarket / Verified Equivalents:

• SLP: VS-343

🚤 Compatibility

Commonly used on:

• Volvo Penta D9 marine and industrial cylinder heads

Typically suits:

• Engine models:

• D9A2A

• D9A2B

• D9A2C

• D9A2D

• D9A2E

• D9A2F

• D9A2G

• D9A2H

• D9A2J

• D9A2K

• D9A2L MH

• D9A2M MP

• TAD940GE

• TAD940VE

• TAD941VE

• TAD942VE

• TAD943VE

• HP Range: D9 rating dependent

• Engine Type: Volvo Penta D9 inline six-cylinder diesel

• Year Range: D9A2 / TAD94x generation; cylinder-head and serial controlled

🔌 Function

Provides the machined sealing surface against which the intake valve closes, retaining compression and transferring valve heat into the cylinder head.

Common signs of failure:

• Low compression or poor cylinder balance

• Pitted, recessed or burnt seat surface

• Excessive valve lash change

• Hard starting, smoke or reduced power

• Seat looseness or cracking found during cylinder-head overhaul

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging