1543611 Compression Spring | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta compression spring from the lubricating and oil system group, serving as the oil pressure reduction (relief valve) spring. It sets the calibrated load that determines when excess oil pressure is bled off, protecting the lubrication circuit from over-pressurisation during cold starts and high engine speeds. It suits the 16-litre TWD, TID, TAD, TD and TAMD engine families.

🚤 Compatibility

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

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1543611
• Oil pressure reduction (relief valve) compression spring
• System group: Lubricating and Oil System
• Net weight 0.023 kg
• Fits TWD1620G/1630, TID162, TD164, TAD1630/1631 and TAMD162/163/165 series engines
• Engine type: Volvo Penta heavy-duty inline-six diesel engine

🔌 Function

The spring applies a calibrated preload to the oil pressure reduction valve, holding it closed until system pressure exceeds the set limit. Once that limit is reached the valve lifts against the spring and diverts surplus oil, keeping lubrication pressure within the designed range.

⚠️ Common Signs of Failure

• Low or erratic oil pressure readings at operating temperature
• Excessively high oil pressure, particularly on cold start-up
• Fatigued, shortened or collapsed spring found during valve inspection
• Corrosion, pitting or broken coils on the spring body
• Relief valve sticking or chattering, producing fluctuating pressure

🛠️ 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
• 1542267 - Valve cover
• 3826150 - Later oil-filter housing
• 3826373 - Later oil-filter housing

📦 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