21489972 Exhaust Manifold | Genuine Volvo Penta Part

🔧 Product Description

A water-cooled exhaust manifold used on Volvo Penta D3 marine diesel engines. It collects exhaust gas from the cylinders and directs it to the turbocharger.

🚤 Compatibility

• Engine Family: D
• HP Range: 110-220 HP

Full model list at the end of this description.

⚙️ Key Features

• Water-cooled marine exhaust construction
• Integrated exhaust-port passages
• Correct D3 turbocharger mounting
• Designed for the specified gaskets and O-rings
• Supports D3-D through D3-G engine configurations where specified

🔌 Function

The manifold combines cylinder exhaust flow, transfers it to the turbocharger and uses engine coolant to control exhaust-component temperature.

⚠️ Common Signs of Failure

• Soot or coolant leakage
• Cracks between exhaust and water passages
• White smoke or coolant loss
• Exhaust ticking
• Reduced turbocharger response
• Corrosion around the outlet or sealing faces

🛠️ Service Notes

• Treat the manifold as a wear item on a raw-water-cooled engine: check the water jacket and gas passages for corrosion, scale and cracks whenever it is off, and replace rather than clean up a casting that is heavily wasted
• Check the mating faces against a straightedge, renew all gaskets, and renew any studs, nuts or bolts that are corroded
• Blank off the open ports while the manifold is away so nothing can drop into a cylinder head
• Tighten the fixings in the sequence and to the figures given in the workshop manual for your engine, and re-check for gas and water leaks once the engine has been up to temperature
• Inspect the riser, elbow and exhaust hose at the same time; corrosion is rarely confined to one part of the system

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21489972 → Supersedes 21117071

OEM / Related Numbers

• 21117071 earlier number superseded by this part
• 21163289 - Turbocharger
• 30777682 - Manifold gasket
• 21252495 - Turbocharger inlet pipe
• 967962 - Plugs
• 948811 - Plugs
• 982292 - O-rings
• 8631549 - Gasket
• 21454204 - Hose
• 961665 - Hose clamps
• 21506563 - Oil pressure pipe
• 995343 - Hollow screws
• 25167 - Hollow screws

OEM Reman Alternatives

• 3801387 - Remanufactured turbocharger

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D3-220I-G, D3-140A-D, D3-170A-D, D3-200A-D, D3-220A-D, D3-140I-D, D3-140A-E, D3-170A-E, D3-200A-E, D3-220A-E, D3-140I-E, D3-140A-F, D3-170A-F, D3-200A-F, D3-220A-F, D3-140I-F, D3-140A-G, D3-170A-G, D3-200A-G, D3-220A-G, D3-140I-G, D3-110I-D, D3-150I-D, D3-170I-D, D3-200I-D, D3-220I-D, D3-110I-E, D3-150I-E, D3-170I-E, D3-200I-E, D3-220I-E, D3-110I-F, D3-150I-F, D3-170I-F, D3-200I-F, D3-220I-F, D3-110I-G, D3-150I-G, D3-170I-G, D3-200I-G, D3-110I-H, D3-140A-H, D3-170A-H, D3-200A-H, D3-220A-H, D3-150I-H, D3-170I-H, D3-200I-H, D3-220I-H, D3-140I-H