1556332 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta valve seat is a precision cylinder-head valve-seat insert used in the cylinder-head inlet-valve seating. It is manufactured to the original Volvo Penta dimensions and interface requirements so the valve closes concentrically with the specified contact width and recession. 0.20 mm oversize inlet valve seat. In service, it provides a 0.20 mm oversize repair seating surface for the inlet valve. Fitment is controlled by the exact engine or product configuration and serialised parts list; confirm OEM number 1556332 against the installed assembly before ordering.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD1630G
• Volvo Penta TWD1630P
• Volvo Penta TWD1630V
• Volvo Penta TID162AG
• Volvo Penta TID162AGP
• Volvo Penta TD164KAE
• Volvo Penta TAMD162C-C
• Volvo Penta TAD1630G
• Volvo Penta TAD1630GE
• Volvo Penta TAD1630P
• Volvo Penta TAD1631GE
• Volvo Penta TAMD163A-A
• Volvo Penta TAMD163P-A
• Volvo Penta TAMD165A
• Volvo Penta TAMD165C
• Volvo Penta TAD1631G

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

⚙️ Key Features

• Genuine Volvo Penta OEM part number 1556332
• 0.20 mm oversize (O.S=0,20mm) service dimension
• System group: Engine
• Net weight approximately 0.039 kg
• Fits TAMD162, TAMD163, TAMD165, TAD1630, TAD1631, TWD1630, TID162 and TD164 series engines

🔌 Function

The valve seat is the hardened ring pressed into the cylinder head against which the intake or exhaust valve closes, forming the combustion chamber seal. It also transfers heat from the valve head into the cylinder head for cooling.

⚠️ Common Signs of Failure

• Loss of compression or hard starting caused by poor valve sealing
• Valve recession, where the valve sinks into the head and valve clearance disappears
• Burnt, pitted or cracked seating face visible during head inspection
• Loose or dropped seat insert causing severe combustion chamber damage
• Rough idle, misfire or exhaust leakage past a worn seat

🛠️ 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

• 1556148 related reference

📦 Condition

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