20459332 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat insert in the 0.20 mm oversize grade, from the Engine group, weighing 0.032 kg and listed for 11 fitments across the TWD and TAD series. The oversize grade is the ordering detail - it suits a cylinder head whose recess has already been machined out.

🚤 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

⚙️ Key Features

• 0.20 mm oversize grade
• 0.032 kg
• Engine group
• Listed for 11 fitments across the TWD and TAD series

🔌 Function

Provides the precision sealing and heat transfer surface the valve closes against.

⚠️ Common Signs of Failure

• Compression leakage traced to the valve running on that seat
• The seat found cracked, burnt, pitted, recessed or loose in the head
• Valve clearance closing up repeatedly as the seat recedes into the head
• The valve unable to be refaced to give the specified sealing contact
• Hot spots or misfire on that cylinder under load

🛠️ Service Notes

• Measure the cylinder head recess before ordering - the oversize seat only suits a head that has already been machined to take it
• Seat replacement is a machine shop job: the recess must be cut concentric and the seat angle cut once the insert is in

📦 Condition

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