NA004139CN Aftermarket Perkins Dual Oil Cooler 1-1/8 in Water Connections | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Perkins Dual Oil Cooler 1-1/8 in Water Connections - Replacement Part Number: NA004139CN

Long dual oil cooler for Perkins marine engine and transmission circuits.

⚙️ Key Features

• Marine-grade tandem shell-and-tube cooler

• 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:

• NA004139CN (primary reference)

OEM / Related Numbers:

• NA004139CN

Aftermarket / Verified Equivalents:

• Mr Cool: MRCNA004139CN

🚤 Compatibility

Commonly used on:

• Marine-grade tandem shell-and-tube cooler systems

Typically suits:

• Engine models:

• Perkins marine installations originally fitted with dual cooler NA004139CN

• Overall Length: 17-1/2 in

• Bundle Length: 12 in

• Water Connections: 1-1/8 in

• Oil Connections: 3/8 in NPT

🔌 Function

The tandem cooler uses separate oil passages and a common seawater circuit to control two fluid systems.

Common signs of failure:

• One or both fluid circuits run hotter than normal

• Pressure or performance falls as the oil heats

• Oil sheen or cross-contamination appears

• External leakage develops around fittings or seams

• Restricted seawater flow or internal tube failure

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging