MRC4025341-13B Aftermarket Cummins 5.9L B-Series Aftercooler Service Kit B O-Ring Kit | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Cummins 5.9L B-Series Aftercooler Service Kit B O-Ring Kit - Replacement Part Number: MRC4025341-13B

Sealing kit for servicing the Cummins 5.9L B-Series marine aftercooler.

⚙️ Key Features

• Complete aftercooler service package

• Designed as a direct replacement for the listed reference numbers

• Helps maintain stable operating temperature under sustained marine load

• Marine connection sizes and mounting points must match the original assembly

• Suitable for professional marine cooling-system service and replacement

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• MRC4025341-13B (B-style service kit)

OEM / Related Numbers:

• 4025341 service-kit family

• MRC4025341-13B

Aftermarket / Verified Equivalents:

• Mr Cool: MRC4025341-13B

Included Components:

• Large end O-rings - Part Number: supplied in MRC4025341-13B

• Secondary housing O-rings - Part Number: supplied in MRC4025341-13B

🚤 Compatibility

Commonly used on:

• Complete aftercooler service package systems

Typically suits:

• Engine models:

• Cummins 6BTA 5.9 marine aftercoolers using the B-style sealing arrangement

• Engine Displacement: 5.9L

• Kit Type: B-style O-ring kit

🔌 Function

The service kit renews seals and support components after core removal, cleaning or pressure testing.

Common signs of failure:

• Boost-air temperature rises or power falls under load

• Coolant or seawater leaks from end joints

• Core movement or fretting occurs

• O-rings become flattened, hard or cut

• Pressure testing shows leakage

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging