🔧 Product Description
Aftermarket Perkins 6.354 Long Heat Exchanger 20-1/2 in - Replacement Part Number: NA001831
Long-version heat exchanger for Perkins 6.354 marine diesel engines.
⚙️ Key Features
• Marine-grade shell-and-tube heat exchanger
• 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:
• NA001831 (long-version reference)
OEM / Related Numbers:
• NA001831
• MRCNA001831
• NA004490 short-version counterpart
Aftermarket / Verified Equivalents:
• Mr Cool: MRCNA001831
🚤 Compatibility
Commonly used on:
• Marine-grade shell-and-tube heat exchanger systems
Typically suits:
• Engine models:
• Perkins 6.354 six-cylinder engines using the long exchanger
• Overall Length: 20-1/2 in
• Flange Diameter: 4-1/8 in
• Package Content: exchanger with mounting flange
🔌 Function
The heat exchanger keeps closed-loop coolant separate from seawater while transferring heat through the tube stack.
Common signs of failure:
• Engine or generator temperature rises above normal under load
• Coolant loss or seawater leakage around the exchanger
• Restricted seawater flow from scale, debris or damaged tubes
• Coolant contamination caused by an internal tube failure
• Corroded end covers, tube stack or sacrificial anode
📦 Condition
• Brand new aftermarket replacement part
• New and unused
• Supplied in manufacturer or equivalent protective packaging
