3858870 Exhaust Manifold | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta exhaust manifold from the Inlet and Exhaust System group, weighing 20.480 kg and listed for 19 applications. It supersedes part number 3858871, which appeared earlier both as a manifold assembly and as a manifold and plug, so the current number covers what were previously two different descriptions of the same listing.

🚤 Compatibility

Typically suits:

• Volvo Penta 3.0GLM-A
• Volvo Penta 3.0GLM-B
• Volvo Penta 3.0GLM-C
• Volvo Penta 3.0GLP-A
• Volvo Penta 3.0GLP-B
• Volvo Penta 3.0GLP-C
• Volvo Penta 3.0GLP-D
• Volvo Penta 3.0GLP-E
• Volvo Penta 3.0GLP-J
• Volvo Penta 3.0GLP-N
• Volvo Penta 3.0GSM-A
• Volvo Penta 3.0GSM-B
• Volvo Penta 3.0GSM-C
• Volvo Penta 3.0GSMWTR
• Volvo Penta 3.0GSP-A
• Volvo Penta 3.0GSP-B
• Volvo Penta 3.0GSP-C
• Volvo Penta 3.0GSPEFS
• Volvo Penta 3.0GSPWTR

⚙️ Key Features

• 20.480 kg - a heavy, two-person lift
• Supersedes 3858871, previously listed as a manifold assembly and as a manifold and plug
• 19 applications
• Inlet and Exhaust System group

🔌 Function

Collects exhaust gas from the cylinder head ports and carries it to the exhaust pipe while its water jacket keeps the surface temperature down.

⚠️ Common Signs of Failure

• Coolant loss with no external leak, or water in the exhaust or a cylinder
• Steam or a salty crust at the manifold joints
• Rust staining and scaling on the outer casting
• Exhaust leak, ticking or soot tracks at the head face
• Overheating or hot spots after internal passages silt up

🛠️ Service Notes

• At 20.480 kg this is a freight-weight item - plan for handling and support it during removal
• Renew the manifold gaskets and the joint hardware when fitting, and check the plugs and any drain fittings on the old casting before discarding it
• Exhaust pipes 3858873 and 3858874 sit downstream of this manifold

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3858870 → Supersedes 3858871 → Supersedes 3857450 → Supersedes 3854045

OEM / Related Numbers

• 3858871 earlier number superseded by this part
• 3857450 earlier number superseded by this part
• 3854045 earlier number superseded by this part

Aftermarket / Verified Equivalents

• Recmar: MAR870

📦 Condition

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