This has just started happening a few days ago. The overflow bottle was going low, put in new coolant. There has been no overheating issues, the engine is running at normal temp, no white smoke from tailpipe and normal power. But,there is a coolant drip, which appears to be fresh coolant, coming from the rear of the right hand head. I cant seen exactly where it originates, maybe up further, since on one cold day last week I seen vapors coming up from the middle of the top of the engine? from coolant hitting something hot. The drips are coming off what looks like a plate held on with one bolt, to which a ground strap (?) is bolted. Any ideas??