1543981 Compression Spring | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta compression spring from the engine group, supplied as a single component for the TD164KAE marine diesel engine. It provides the calibrated spring force that returns or preloads the assembly it is fitted within, and is a small but critical wear item during engine overhaul or component rebuild work.

🚤 Compatibility

Typically suits:

• Volvo Penta TD164KAE

• Engine Family: TD

⚙️ Key Features

• Dedicated cylinder-head valve-caliper spring
• Installed beside valve caliper 1556167
• Works within the rocker-arm and valve-actuation assembly
• Calibrated spring load for the original TD164KAE valvetrain
• Should be replaced if distorted, cracked or outside the service-length specification
• Engine type: Volvo Penta 16-litre diesel
• 12 used per assembly

🔌 Function

A compression spring stores energy when compressed and delivers a controlled return force to the component it supports, maintaining preload, seating pressure or positive return travel. In an engine assembly it keeps the mating parts loaded correctly through their full range of movement.

⚠️ Common Signs of Failure

• Loss of spring tension or a spring that no longer returns the component fully
• Visible corrosion, pitting or scaling on the coils
• Cracked, broken or collapsed coils found during inspection
• Permanent set - the free length measures shorter than specification
• Rattling, sticking or erratic operation of the assembly the spring controls

🛠️ Service Notes

• Compare the new spring with the one removed for free length and coil condition; a spring that has taken a set or lost length is past its useful life
• Look over the old spring for corrosion pitting, bright rub marks and cracked or broken coil ends, and check whatever it bears against for the same wear
• Never stretch, shorten, grind or heat a spring to alter how it behaves — fit the correct part instead
• Seat the spring squarely in its recess or over its guide with the ends fully home, so it cannot cock over or bind in service
• Where springs work as a group, renew them together so the load stays even across the set

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 1556167 - valve caliper
• 1543368 - adjusting screw
• 946911 - hexagon nut
• 1543441 - rocker arm

📦 Condition

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