HGE8870 Aftermarket Volvo Penta 3.0L GM Exhaust Manifold | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Volvo Penta 3.0L GM Exhaust Manifold - Part Number: HGE8870

A water-jacketed GM 181 CID / 3.0L exhaust manifold for Volvo Penta and OMC marine engines. It replaces several 385 and 986-series service numbers.

⚙️ Key Features

• For GM 3.0L inline-four marine engines

• Water-jacketed marine cast-iron construction

• Crosses to Volvo Penta and OMC numbers

• Matches HGE8870 / MAR870 pattern

• Use new head and elbow gaskets

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3858870 → Later service number related to 3854045, 3857450 and 3858871

OEM / Related Numbers:

• HGE8870

• 3858870

• 986985

• 3854045

• 3857450

• 3858871

• OMC 986371

Aftermarket / Verified Equivalents:

• HGE: HGE8870

• Recmar: MAR870

• GLM: 51450

• Barr Marine: BAOMC-1-3858870

🚤 Compatibility

Commonly used on:

• Volvo Penta and OMC GM 3.0L exhaust systems

Typically suits:

• Engine models:

• Volvo Penta 3.0GL / 3.0GS / 3.0GSP / 3.0GSM families using 3858870

• OMC 3.0L GM inline-four applications using 986371 or 986985

• Engine Displacement: 181 CID / 3.0L

• Engine Type: GM inline-four petrol marine engine

🔌 Function

The manifold collects exhaust from all four cylinders while the water jacket controls casting temperature.

Common signs of failure:

• External exhaust or cooling-water leakage

• Internal water leakage into the exhaust ports or cylinders

• Restricted cooling passages or abnormal manifold temperature

• Cracked casting, warped flange or corroded sealing face

• Loss of power caused by an internally restricted exhaust passage

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging