In follow up to my other post, I think I'm going to change the intake manifold gaskets on my port engine. I did the Stb engine when I first got the boat because there was coolant showing when I removed one of the bolts. This one I'm going to do because of the oil leak picture I posted and I just noticed that my overflow tank is empty? Hmmm.. the H/E level if fine but I swear I thought the oil looked a little "thin" when I checked it during the season.... the color looked ok. I read another post from someone who also was losing coolant in the overflow tank and it was the intake gaskets that fixed it. So, maybe two reasons to change them out. Where should I be draining the block so I don't dump coolant into the engine like I did last time? Don't I just need to get the level below the height of the intake manifold? thnks Bob