Can anyone help? I got a late start this season, but I replaced the heat exchanger, manifolds, risers, elbows, spacers, stainless blockoff plates and gaskets on my port 270 fwc Crusader. After a 20 minute 5 mph ride from our marina to our mooring and back last Saturday, I lost a gallon of coolant. It’s not leaking out into my bildge, and it’s definately not a blown head gasket. Engine is running perfect, and at a 5mph ride the engine stays at 170 degrees. Also oil level is right where it should be, and oil is pristine! Has anyone had a similar issue. I’m thinking maybe a bad intake manifold gasket, but have found no posts in regards to a coolant leak due to a faulty intake manifold gasket. Can anyone help?! Thanks!! Ken