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wheres my coolant going?!?

J

jrdowd79

New member
1989 merc 350 bravo inboard closed loop cooling overheating and leaking coolant. Not in bilge, spark plugs and oil look good. Doesnt look like its going through the exhaust. Any idea where to look next? Any help or tips appreciated. Dont think its going through head to crankcase but if it does, could it go anywhere else after that? oil level is good and oil isnt murky cloudy or separating.
 
Pull the heat exchanger and pressure test it. If your not getting coolant in the oil it is most likely going out with the raw water? If you have a oil cooler you should probably give it a close look as well.
 
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