856904 Exhaust Manifold | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta exhaust manifold from the Inlet and Exhaust System group, weighing 20.412 kg and listed for 26 applications across the BB, DP, SP, MS and SHIELD groups. It supersedes 855975, which was catalogued earlier as an exhaust pipe. A second manifold in this run, 856908, is listed at 20.865 kg - 453 grams apart, so the two must be ordered by part number and fitment.

🚤 Compatibility

• Engine Family: BB, DP, SP, MS, S

Full model list at the end of this description.

⚙️ Key Features

• Inlet and Exhaust System exhaust manifold
• 20.412 kg
• 26 applications across BB, DP, SP, MS and SHIELD
• Supersedes 855975, catalogued earlier as an exhaust pipe

🔌 Function

Collects the exhaust gas from the cylinder ports and carries it, water-jacketed, to the riser or exhaust pipe.

⚠️ Common Signs of Failure

• Exhaust ticking or blowing along the head face
• Soot fanning from a port joint
• Rust scaling, blistering or weeping from the water jacket
• Seawater or coolant loss traced back to the manifold
• Water carrying back into the cylinders after shutdown

🛠️ Service Notes

• Renew the head-face and outlet gaskets; check all faces for flatness and corrosion
• Pressure-test the water jacket before fitting if the old one was suspected of internal breakthrough
• Freight-scale item at 20.412 kg - a two-person lift, and it needs supporting while the studs are located

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 856904 → Supersedes 855975

OEM / Related Numbers

• 855975 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 740B, 501B, 570A, 572A, 740A, 430A, 430B, 431A, 431B, 432A, 434A, 570, 500B, 430
• Volvo Penta DP-C, DP-C1, DP-D, DP-D1, DP-A, DP-A2
• Volvo Penta SP-C, SP-A2, SP-C1
• Volvo Penta BB740A
• Volvo Penta MS4B
• Volvo Penta Shield for 740A