1543615 Compression Spring | Genuine Volvo Penta Part

🔧 Product Description

This is the genuine Volvo Penta compression spring for the by-pass valve within the lubricating and oil system. It provides the calibrated spring load that sets the point at which oil is diverted through the by-pass, protecting the circuit from excessive pressure. The by-pass designation is what distinguishes this spring from other springs used elsewhere in the oil system.

🚤 Compatibility

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

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1543615
• By-pass application within the oil circuit
• System group: Lubricating and Oil System
• Net weight 0.027 kg
• Fits TWD1620/TWD1630, TID162, TD164, TAD1630/TAD1631, TAMD162, TAMD163 and TAMD165 series engines
• Engine type: Volvo Penta heavy-duty inline-six diesel engine

🔌 Function

The spring applies a preset load to the oil by-pass valve so it stays closed until system pressure reaches the designed opening point. Once that point is exceeded, the valve lifts and excess oil is routed away, limiting pressure in the lubricating circuit.

⚠️ Common Signs of Failure

• Low or unstable oil pressure readings caused by a weakened or collapsed spring
• Oil pressure warning light or alarm activating at operating temperature
• Visible fatigue, shortened free length or permanent set in the spring
• Cracked or broken coils, or corrosion and pitting on the spring surface
• By-pass valve sticking or chattering, producing irregular pressure behaviour

🛠️ 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

• 1543608 - Oil valve housing
• 1543610 - Oil valve peg
• 1543964 - Oil valve seat
• 1543577 - Housing sealing ring
• 471634 - Related coolant pipe
• 1543572 - Related sealing ring

📦 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 TAD1630G, TAD1630GE, TAD1630P, TAD1630PB
• Volvo Penta TID162AG, TID162AGP, TID162AP, TID162APB
• Volvo Penta TWD1630G, TWD1630P, TWD1630PP, TWD1630V
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAMD163A-A, TAMD163P-A
• Volvo Penta TAMD165A, TAMD165C
• Volvo Penta TD164KAE
• Volvo Penta TWD1620G