1543188 Cap Screw | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta cap screw from the cooling system group, used as a threaded fastener securing cooling system components on the TAMD, TAD, TWD and TID 16-litre engine families. It is a small, precision fastener with a net weight of approximately 0.007 kg, supplied as a single piece. Correct fasteners are essential to maintaining clamping force and sealing integrity at cooling system joints.

🚤 Compatibility

• Engine Family: TWD, TID, TD, TAMD, TAD
• Year Range: Approximately late 1980s through the 2000s

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta OEM part number 1543188
• System group: Cooling System
• Net weight approximately 0.007 kg (6.8 g)
• Supplied as an individual cap screw
• Fits TWD, TID, TAD and TAMD 162, 163, 164, 165, 1630 and 1631 series engines
• Engine type: Volvo Penta 16-litre inline 6-cylinder turbocharged diesel

🔌 Function

The cap screw clamps and retains cooling system components against their mating surfaces, maintaining the correct joint pressure for gaskets and seals. Correct torque on this fastener keeps coolant contained and the assembly securely located under engine vibration and thermal cycling.

⚠️ Common Signs of Failure

• Coolant seepage or weeping at the joint the screw secures, indicating lost clamping force
• Corrosion or pitting on the shank or head from prolonged coolant and moisture exposure
• Damaged, rounded or stripped drive head preventing correct torque application
• Stripped or galled threads causing the screw to spin without tightening
• Screw loosening or backing out under vibration, allowing component movement

🛠️ Service Notes

• This screw sits in the cooling system, so when it is removed, check the surface it seats against for coolant staining or corrosion — that shows a joint has been weeping even if nothing was visibly leaking while the engine ran.
• It is a small precision fastener rather than a structural bolt — clean the thread in the casting rather than running a tap through by feel, since the 16-litre cooling-system castings it fits are easily damaged by a mis-started fastener.

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 8149980 related coolant pump
• 276636 related coolant-pump overhaul kit
• 1543452 related coolant-pump drive gear
• 1675920 related pump shaft
• 1543906 related stop ring
• 1556331 related impeller
• 958811 and 1676432 related oil seals

📦 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 TAMD165A, TAMD165C, TAMD165P
• Volvo Penta TWD1630G, TWD1630P, TWD1630PP
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAMD163A-A, TAMD163P-A
• Volvo Penta TD164KAE
• Volvo Penta TWD1620G