1543870 Valve Spring | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta valve spring from the Engine system group, used in the cylinder head valve train of the 16-litre TAMD, TWD, TAD, TID and TD engine families. It maintains valve closing pressure and keeps the valve in controlled contact with the camshaft actuation train throughout the engine's operating range. Springs are normally replaced as a complete set per cylinder head during valve service or overhaul.

🚤 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 1543870
• System group: Engine
• Net weight 0.11 kg
• Fits TAMD162, TAMD163, TAMD165, TWD1620/1630, TAD1630/1631, TID162 and TD164 series engines
• Valve train component, typically renewed as a matched set at cylinder head overhaul
• Engine type: 16.1L inline-six turbocharged/aftercooled diesel
• 12 used per assembly

🔌 Function

The valve spring applies the closing force that seats the intake or exhaust valve and returns it after the cam lobe lifts it. It also keeps the valve, bridge and rocker gear in constant contact so valve timing and sealing remain accurate at all engine speeds.

⚠️ Common Signs of Failure

• Fractured or collapsed spring coils found during head inspection
• Loss of free length or spring tension measured below specification
• Valve float, misfire or power loss at higher engine speeds
• Noisy valve train, tapping or irregular rocker movement
• Poor compression or valve leakage caused by a valve not seating fully

🛠️ 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

• 1543871 inner exhaust valve spring
• 1543866 exhaust valve-spring washer
• 1543860 exhaust valve seat

Aftermarket / Verified Equivalents

• Crom: 112235

📦 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