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I have a perkins 4108 diesel in my sailboat,last fall i removed the how water heater and ran the inline to the outline,i replaced the exhaust elbow , had the heat exchanger removed and cleaned and replaced the 160 ther4mostat with a 140.as soon as i put the motor under load(in gear) it heats up to about 220 and we can smell antifreeze in the cabin.currently it is 100 percent antifreeze in the cooling system.i replaced the old(original alternator with a 120 amp high output(this seems to put more drag on the motor)

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Two things spring to mind.

1. Are you sure that the system doesn't have an air lock?
2. Has the removal of the heater reduced the systems capacity to cool the engine?

Posted on Feb 08, 2010

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Posted on Jan 02, 2017

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e9c0b51.jpg

Fig. : Exploded view of the heater core and related components - 1991-92 vehicles without A/C


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