1542154 Heat Shield | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta injector heat shield used in the injector and heat-shield mounting stack on 30- and 40-series indirect-injection diesel engines. The part is installed at every injector position and must be assembled in the sequence shown in the engine fuel-system arrangement. Four are normally required for a complete 30-series engine and six for a complete 40-series engine. The heat shield, waved washer, injector washer and support washer are separate service parts and should not be interchanged.

🚤 Compatibility

Typically suits:

• Volvo Penta MD40A
• Volvo Penta TMD40A
• Volvo Penta TMD40B
• Volvo Penta TMD40C
• Volvo Penta AQAD40B
• Volvo Penta AQAD30A
• Volvo Penta MD30A
• Volvo Penta TAMD30A
• Volvo Penta TD30A
• Volvo Penta TMD30A
• Volvo Penta AQAD40A
• Volvo Penta AQD40A
• Volvo Penta TD40A
• Volvo Penta TAMD40A
• Volvo Penta TAMD40B

• Engine Family: MD, TMD, AQAD, TAMD, TD, AQD
• Year Range: Approximately 1970s-early 1990s

⚙️ Key Features

• OEM Volvo Penta part number 1542154
• System group: Fuel System
• Net weight: 0.009 kg
• Fits MD30, MD40, TMD30, TMD40, TAMD30, TAMD40, TD30, TD40, AQD40 and AQAD series marine diesel engines
• Single-piece heat shield for direct replacement
• Engine type: Volvo Penta four- and six-cylinder indirect-injection diesel
• Quantity varies by assembly, most commonly six

🔌 Function

The heat shield deflects and blocks radiated heat from hot engine and exhaust surfaces so that nearby fuel system components stay within safe operating temperatures. This helps maintain stable fuel delivery and reduces heat-related deterioration of adjacent parts.

⚠️ Common Signs of Failure

• Visible warping, buckling or distortion from prolonged heat exposure
• Cracking or splitting around mounting points
• Corrosion, scaling or burn-through of the shield material
• Loose, rattling or missing fasteners allowing the shield to shift out of position
• Signs of heat damage or hardening on the fuel lines and fittings the shield is meant to protect

🛠️ Service Notes

• Fit heat shields before anything else is routed near the exhaust, and check there is clear air space between the shield and every hose, cable, fuel line and belt
• Renew any insulation, gaskets, spacers or standoffs supplied with the shield; a shield clamped flat onto a hot surface loses much of its effect
• Tighten the fixings evenly and only to the figure in the workshop manual for your engine — the tabs and brackets are thin and distort easily
• Never run the engine with a shield missing or loose: bare exhaust surfaces are a fire risk in an engine space and a burn risk to anyone working alongside
• Check the shield and its fasteners whenever the exhaust is disturbed, as vibration works them loose and a rattling shield soon cracks at its mounting tabs

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 1542157 heat-shield washer
• 1542158 waved washer
• 1542159 injector washer
• 1542197 related retaining washer
• 1542155 original injector assembly
• 924068 → 980226 injector retaining stud
• 955782 retaining nut
• 1542167 related injector leak-off pipe
• 1544137 related injector leak-off pipe

OEM Reman Alternatives

• 3803239 exchange / later injector assembly

📦 Condition

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