21393038 Inlet Manifold | Genuine Volvo Penta Part

🔧 Product Description

Cast intake manifold for specified Volvo Penta D9 marine and generating-set engines. It distributes charge air evenly from the inlet system to the cylinder-head intake ports and incorporates the correct mounting, sealing and sensor/plug provisions for the applicable D9 configuration.

🚤 Compatibility

• Engine Family: D, TAD
• HP Range: Approximately 500 HP

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta D9 inlet manifold
• Distributes charge air across all six cylinders
• Supersedes the earlier 20708331 manifold reference
• Correct machined flange and threaded port arrangement
• Suitable for replacement following cracking, corrosion or sealing-face damage
• Engine type: Volvo Penta D9 inline six-cylinder turbocharged diesel

🔌 Function

Receives compressed intake air and divides it between the six intake ports. Correct manifold sealing is essential for stable boost pressure, balanced cylinder filling and accurate air-system readings.

⚠️ Common Signs of Failure

• Boost leakage, hissing or oil mist around the manifold joint
• Cracked casting or damaged threaded ports
• Uneven engine response or reduced rated power
• Intake-pressure fault codes or unstable boost readings
• Gasket failure, soot/dust tracking or loose mounting fasteners

🛠️ Service Notes

• Blank the open ports as soon as the manifold is off, so nothing can drop into a cylinder or the head while it is away
• Clean both mating faces without scoring them, check the manifold for flatness, cracks and corrosion, and fit new gaskets and seals throughout
• Clean out oil, soot and carbon deposits from the manifold interior before refitting, and look at the crankcase breather arrangement if the build-up is heavy — refitting a fouled manifold puts the restriction straight back
• Tighten the fasteners evenly, working outwards from the centre in stages to the figures given in the workshop manual for your engine
• Refit and check all charge air, breather and sensor connections and their clips; an air leak on a pressure-charged inlet shows up as lost power and smoke rather than an audible leak

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21393038 → Supersedes 20708331

OEM / Related Numbers

• 20708331 earlier number superseded by this part
• 947281 - associated gasket
• 960628 - associated threaded plug
• 996457 - configuration-specific flange screws
• 984740 - configuration-specific flange screws
• 1161231 - specified sealing compounds used during assembly
• 1161277 - specified sealing compounds used during assembly
• 1546517 - associated spacer

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D11C1-A MP, D11C3-A MP, D11C2-A MP, D11C4-A MP, D11B3-A MP, D11B4-A MP, D11A-A, D11A-B, D11A-C, D11A-E, D11B2-A MP, D11A-C MP, D11A-D MP, D11A-E MP, D11A-C (IPS), D11B1-A MP
• Volvo Penta D9A2J, D9A2G, D9A2L MH, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2M MP, D9A2A, D9A2C, D9A2E
• Volvo Penta TAD940GE, TAD940VE
• Volvo Penta TAD941VE, TAD941GE
• Volvo Penta TAD942VE
• Volvo Penta TAD943VE
• Volvo Penta TAD950VE
• Volvo Penta TAD951VE
• Volvo Penta TAD952VE