So from searching and reading the threads about this, it appears that the removal of the plug on even a brand new engine (mine is only two months old) is a real bear, with the prospect of also having to lower the exhaust header. There does appear to be a perfect location to hang a tank type circulating heater on the drivers side rail toward the front. The heater's outlet would be below the heater core's inlet hose and the heater's inlet would be above the lower radiator hose, both requirements. All of these heaters seem to have 5/8" nipples which I believe the Forester's hoses are. This type of heater is also considered the most efficient. Are any of you aware of any issues with this install? Correct me if I'm wrong about the difficulty of removing the plug. Thank You!