1543964 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta valve seat from the lubricating and oil system group, part number 1543964. It provides the machined seating surface against which the oil system valve closes, maintaining a controlled seal for correct oil pressure regulation. It suits the TWD, TID, TAD and TAMD 162, 163, 165, 1620 and 1630 series engines.

🚤 Compatibility

• Engine Family: TWD, TID, TD, TAMD, TAD

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1543964
• System group: Lubricating and Oil System
• Net weight 0.043 kg
• Fits TWD, TID, TAD and TAMD 162, 163, 165, 1620 and 1630 series engines
• Supplied as an individual seat component, not a complete valve assembly
• Engine type: Volvo Penta 16-litre six-cylinder diesel

🔌 Function

The valve seat forms the fixed sealing face that the oil system valve seals against when closed. A correctly formed seat is what allows the valve to open and reseat at the intended pressure, keeping lubricating oil pressure within specification.

⚠️ Common Signs of Failure

• Low or fluctuating oil pressure readings
• Oil pressure warning light or alarm during operation
• Pitting, wear ridges or erosion on the sealing face
• Valve failing to reseat fully, allowing continuous bypass flow
• Noisy or chattering valve operation under load

🛠️ Service Notes

• Seat inserts are an interference fit in the head, so the counterbore has to be clean, round, flat and square before a new seat goes in; normal practice is to chill the insert and warm the head so it drops into place rather than forcing it
• This is machine-shop work — the seat must be cut concentric with the valve guide after installation, so check or renew the guides at the same time and cut the seat angles once the insert is secure
• Inspect the head casting for cracks and for a pounded or spread counterbore before committing to a new seat; a seat that has come loose has usually damaged its pocket
• Use the interference fit, insert size and seat angles specified for your engine rather than any general figure, as they differ between heads
• Check each valve on its finished seat for an even contact band right the way round, and confirm valve position and any permitted recession against the workshop manual for your engine

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 1543608 - housing
• 1543630 - compression spring
• 1543610 - control peg
• 1556177 - related oil pump
• 1556730 - related oil pump

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD162C-C, TAMD162A, TAMD162B, TAMD162C, TAMD162C-B
• Volvo Penta TAD1630G, TAD1630GE, TAD1630P, TAD1630PB
• Volvo Penta TID162AG, TID162AGP, TID162AP, TID162APB
• Volvo Penta TWD1630G, TWD1630P, TWD1630PP, TWD1630V
• Volvo Penta TAMD165A, TAMD165C, TAMD165P
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAMD163A-A, TAMD163P-A
• Volvo Penta TD164KAE
• Volvo Penta TWD1620G