ISM, ISMe, and QSM11 – 008-053   Heat Exchanger

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Remove

TOC

Disconnect the coolant vent line from the expansion tank.

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Disconnect the wiring harness from the coolant level sensor.

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Remove the two capscrews from the lower sea water pipe flange at the aftercooler assembly.

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Remove the two capscrew and tube clamps.

Remove the sea water inlet pipe from the heat exchanger assembly.

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Remove the two capscrews from the marine gear oil cooler and disconnect it from the outlet side of the heat exchanger assembly.

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Remove the two capscrews from the flange at the coolant water pump inlet.

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The coolant tube is a floating connection.

Remove the coolant tube and o-ring from the heat exchanger by twisting and pulling the coolant tube straight out.

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Remove the two capscrews and coolant return tube from the upper portion of the expansion tank.

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Loosen the two hose clamps at the thermostat housing and remove the coolant return tube.

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Remove the two mounting capscrews from the front of the heat exchanger.

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Remove the two mounting capscrews from the lower heat exchanger rear mounting bracket.

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Remove the two mounting capscrews from the upper heat exchanger mounting bracket.

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 WARNING 

This component or assembly weighs greater than 23 kg [50 lb]. To prevent serious personal injury, be sure to have assistance or use appropriate lifting equipment to lift this component or assembly.

Remove the heat exchanger and expansion tank assembly from the engine.

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Last Modified:  08-May-2008