3860907 Aftermarket Volvo Penta 8.1 GI/8.1 IPS Petrol Heat Exchanger | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Petrol Engine Heat Exchanger - Replaces Part Number: 3860907

New copper-nickel replacement heat exchanger for Volvo Penta 3860907. The approximately 4-inch × 21-inch assembly is used on GM 8.1L big-block petrol packages, including specified Gi/GXi and IPS installations.

⚙️ Key Features

• Direct replacement for Volvo Penta 3860907

• Approximately 4-inch diameter × 21-inch tube-bundle length

• Copper-nickel seawater core

• Designed for 8.1L big-block petrol engines

• Supports specified sterndrive/inboard/IPS cooling layouts

🧰 Kit / Assembly Contents

• 1 × Complete heat exchanger assembly - P/N 3860907

• 1 × integrated copper-nickel tube bundle

• End caps, seals, zincs, hoses and mounting hardware are renewed separately unless included

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3860907 (Volvo Penta OEM heat-exchanger reference)

OEM / Related Numbers:

• 3860907CN

Aftermarket / Verified Equivalents:

• Mr Cool: MRC3860907CN

• Lenco: LE3860907

• Seakamp copper-nickel 8.1L replacement

🚤 Compatibility

Commonly used on:

• Volvo Penta GM 8.1L petrol marine engines

Typically suits:

• Engine / Equipment models:

• 8.1Gi model families

• 8.1GXi model families

• 8.1 IPS petrol installations specifying 3860907

• Output / Engine Rating: Approximately 375HP - 420HP

• Engine / System Type: 8.1L GM big-block fuel-injected petrol marine engine

• Year Range: 8.1L Volvo Penta production era

• Serial / Model Identification: Confirm engine serial, mounting bracket and hose arrangement.

🔌 Function

The heat exchanger transfers engine or generator coolant heat into the raw-water circuit while keeping the two fluids separated. This maintains the correct closed-circuit operating temperature and protects the engine from direct seawater circulation.

Common signs of failure:

• Engine or generator overheating under sustained load

• Coolant loss without an obvious external hose leak

• Saltwater and coolant cross-contamination

• Restricted raw-water discharge or uneven end-cap temperature

• Corrosion, green staining, cracked solder joints or pressure-test failure

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging