1543871 Valve Spring | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta valve spring from the Engine group, used in the cylinder head valve train of the TD164KAE marine diesel engine. It provides the closing force that returns the intake or exhaust valve to its seat after each camshaft-driven opening event. Valve springs are normally replaced as a matched set during cylinder head overhaul to keep valve control consistent across all cylinders.

🚤 Compatibility

Typically suits:

• Volvo Penta TD164KAE

• Engine Family: TD
• HP Range: Approximately 500-770 HP
• Year Range: Approximately late 1980s-2005

⚙️ Key Features

• OEM Volvo Penta part number 1543871
• System group: Engine
• Net weight: 0.073 kg
• Fits the TD164KAE marine diesel engine
• Valve train component for cylinder head service and overhaul
• Engine type: 16.1L inline-six turbocharged/aftercooled diesel
• 12 used per assembly

🔌 Function

The valve spring closes the engine valve and holds it firmly against its seat once the camshaft lobe releases the valve. Correct spring force keeps the valve following the cam profile at high speed, maintaining compression sealing and valve timing accuracy.

⚠️ Common Signs of Failure

• Noisy valve train, ticking or clatter from the cylinder head
• Loss of compression or power due to valves not seating fully
• Valve float or misfire at higher engine speeds
• Visible cracking, corrosion pitting or a broken spring coil
• Reduced free length or measured spring force below specification

🛠️ 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

• 1543870 outer exhaust valve spring
• 1543866 exhaust valve-spring washer
• 1543860 exhaust valve seat

Aftermarket / Verified Equivalents

• Crom: 112236

📦 Condition

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