maifolds checked out and risers are good no leaks. and no leaks in the intake maifold. here what i have stubled apon though condinsation. i changed out the thermostat housing with my new engine combo from the older style to the new low profile one. my best guess is the water is way to cold going in to the maifolds boat runs at 150 degrees but on the newer thermo housing not muchof the water is heated before the riser so the water is cold pretty crazy and dumb.