My 3010 is overheating. I used it on a wood splitter for about an hour last week - it seemed to pull down a bit then poured out steam. Shut everything down and after it cooled off I took off the hood thinking it was the top hose. The hose is ok. I filled up the radiator and then ran it a while. Saw no leaks until it got warm, then it started to leak around the cap. Do you think this is the thermostat? How hard is it to change that? Also - the temp gage does not work - is that hard to replace while I have this apart? Not sure what I am doing, would appreciate guidance. Thanks!!