Actually found 2 freeze plugs laying in the bottom of the boat. I KNOW what a dumbass. It got down to 16 & 18* a couple nites last week. I was busy making sure pipes were wrapped on my house & at the wifes shop & forgot all about the boat.
I checked the oil after fixing freeze plugs & oil was slightly milky like from normal condensation. I ran to the lake & ran it on the trailer for 5-10 minutes. Checked oil & didnt seem any worse , so I made 2 1/2 passes, put on the trailer & checked again. Seemed just a little milkier. Went home drained oil overnite , put new filter & fresh oil in & ran it on the hose. I ran it for 10- 12 minutes with thermostats in the heads reading 175* . Again slightly milky. Maybe from left over residual condensation ? Can I somehow pressure test it to see if I cracked the block ? . What else can I do b-4 I have to tear it down. As stupid as it sounds , can I used the bucket method to circulate warm water thru the engine with some moroso block sealer or would I just be asking for it ? This is a real bad time for me to have to tear the block down or find another, I been off work since Sept. from shoulder surgery