07-19-2021, 05:59 AM
It could be the Heat Exchanger as mentioned by jclark003. On my 1997 31 open w/454 (previous Tiara) the heat exchanger failed allowing antifreeze to get into the salt water side when running.. The indication I had was the overflow antifreeze bottle located on the engine started to overflow as seawater was sucked into the cooling system when the engine cooled down.
