Freshwater Cooling Full System for Mercruiser 357 Magnum Engines with Serpentine Belt (#MFH-5456)

High Capacity On-Engine Block & Manifold Freshwater Cooling Kit for Mercury Remanufacturing 357 Engines Instructions. NOTE: This kit will fit Mercruiser Remanufactured 357 Model serpentine belt engines with the low Port side mounted alternator.

This cooling system has several benefits versus other standard after market systems. This system is based on the high capacity, "OEM" products, even manufactured by the same company that produces the OEM systems for Mercruiser, Volvo Penta, Yanmar, Westerbeke, Polaris, and others. This system utilizes a higher number of cooling tubes, more passes on the sea water portion of the cooler, as well as includes "sealed" dividers. This is the same design technology used by Mercruiser and Volvo Penta on their OEM systems. Will NOT fit engines with high mounted alternators and/or v-drives. Heat exchanger extends from extreme starboard side of a normal exhaust manifold towards port side clearing most high mounted power steering pumps if any (See above illustration). Plastic expansion tank mounts either on front of heat exchanger or if space is limited on vertical surface next to engine. Full system - Block and manifold. Engine block and exhaust manifold on fresh water system. Exhaust elbows remain on raw water system.

Kit includes heat exchanger, heavy duty translucent plastic expansion tank plus all other components necessary to complete conversion. Some components from engine such as hoses are re-used. Heat exchanger painted black. Brackets and other components painted black or zinc plated. All hose clamps are stainless. Shell and tube type. C12200 all copper alloy construction made to the highest industry standards.

MFH-5456 Installation Instructions