1543872 Valve Spring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve spring for the engine group, serving the cylinder head valvetrain on the 16-litre inline-six marine and industrial diesel family. It maintains valve closing force and controls valve motion throughout the engine's operating range. Supplied as a single spring, so order the quantity needed for the cylinder head being rebuilt.

🚤 Compatibility

• Engine Family: TWD, TID, TD, TAMD, TAD
• HP Range: Approximately 500-770 HP
• Year Range: Approximately late 1980s-2005

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1543872
• System group: Engine
• Net weight 0.077 kg
• Fits TWD1620G, TWD1630, TID162, TD164, TAD1630/1631, TAMD162, TAMD163 and TAMD165 series 16-litre diesel engines
• Sold as an individual spring for per-valve replacement
• Engine type: 16.1L inline-six turbocharged/aftercooled diesel
• 12 used per assembly

🔌 Function

The valve spring holds the intake or exhaust valve closed against its seat and returns it after the camshaft lobe lifts it, keeping the valve train in constant contact with the cam profile. Correct spring force prevents valve float and ensures proper cylinder sealing at high engine speeds.

⚠️ Common Signs of Failure

• Loss of free length or reduced spring tension measured against specification
• Valve float, misfire or power loss at higher engine speeds
• Ticking or clattering noise from the cylinder head area
• Visible cracking, corrosion pitting or a fractured coil
• Poor compression or valve seat leakage caused by a valve not fully closing

🛠️ Service Notes

• Renew valve springs as a complete set for the engine rather than replacing individual springs, and never mix new springs with used ones in the same head
• Check free length and squareness of the new springs against the figures in the workshop manual for your engine, and reject any that are out
• Fit the spring the specified way up where the coils are closer together at one end or where the spring carries a marking, and use the correct seat and retainer for that spring
• Fit a new valve stem seal where one is used, and make sure the collets are fully and evenly seated before the compressor is released — then tap the retainer lightly and confirm nothing has moved
• Keep valves, springs and collets in cylinder order if any used parts are being refitted, and turn the engine over by hand before starting to confirm nothing binds

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 1543046 inlet valve-spring washer
• 1543861 inlet valve seat

Aftermarket / Verified Equivalents

• Crom: 112237

📦 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 TID162AG, TID162AGP, TID162AP, TID162APB
• Volvo Penta TAD1630G, TAD1630GE, TAD1630P
• Volvo Penta TWD1630G, TWD1630P, TWD1630V
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAMD163A-A, TAMD163P-A
• Volvo Penta TAMD165A, TAMD165C
• Volvo Penta TD164KAE
• Volvo Penta TWD1620G