I have a 1985 sa 200. It has no heat temp gauge or oil pressure gauge. It welds fine in all ranges with all sizes of rod. Has an oil leak on the pan. What else should i be looking for??? How hot will the machine get???? what is normal.? Coolant looks fine not discolored . Changed oil last week and welded for a few hours today. I guess if i burn for about 5 hours straight i will see if it has problems? This is my first machine , appreciate any info . Thanks alot.