Replacement Heat Exchanger for 400 HP Weichai Marine Diesel Engine

A replacement heat exchanger for a 400 HP Weichai marine diesel engine (commonly found on WD12 or WP12 series models) typically uses a dual-circuit shell-and-tube design to cool engine fresh water using raw seawater. Units or matching part numbers are sourced via specialized marine diesel distributors or global industrial marketplaces.

Engine Family: Weichai WD12 / WP12 series (350–400 HP inline 6-cylinder turbocharged diesel).

Cooling Type: Dual-circuit (Internal fresh water loop + external raw water/seawater loop).

Common Part Numbers: 1002240064Z, 1002791122Z, or series-specific equivalents.

Materials: Corrosion-resistant copper/cupronickel tube stacks with cast or treated end covers built for marine environments.