MikeLima
Pre-Flight
1976 C-182 Continental 0-470
Single probe EGT- gauge has no numbers but each line is 25 degree increment
Yesterday partner saw from the outset of his flight egt reading approx 75 degrees higher than normal. If applied carb heat, it would drop and as altitude increased, it dropped. This happened once about 15 hours ago but cleared up and has been as per usual sense and I had suspected egt gauge/probe issue. Today I went down and flew it to get more info. Still reading higher than usual. At cruise power, left mag alone would increase egt 25 degrees and right mag alone jumped it 50-60 degrees. (Based on the incremental lines each being 25 degrees apart)
Talked to mechanic and he said exhaust valve. I suspected mag timing issue or something in that line. I can imagine a slight difference in turns when I pull the prop through but obviously that's subjective and I don't even know if it's the cylinder the probe is on. Input?
If it's exhaust valve, is it likely to be a cylinder replacement? If it's exhaust valve is damage already done and flying it won't kill something else or is flying it gonna burn something up?
Be gentle.
ML
Single probe EGT- gauge has no numbers but each line is 25 degree increment
Yesterday partner saw from the outset of his flight egt reading approx 75 degrees higher than normal. If applied carb heat, it would drop and as altitude increased, it dropped. This happened once about 15 hours ago but cleared up and has been as per usual sense and I had suspected egt gauge/probe issue. Today I went down and flew it to get more info. Still reading higher than usual. At cruise power, left mag alone would increase egt 25 degrees and right mag alone jumped it 50-60 degrees. (Based on the incremental lines each being 25 degrees apart)
Talked to mechanic and he said exhaust valve. I suspected mag timing issue or something in that line. I can imagine a slight difference in turns when I pull the prop through but obviously that's subjective and I don't even know if it's the cylinder the probe is on. Input?
If it's exhaust valve, is it likely to be a cylinder replacement? If it's exhaust valve is damage already done and flying it won't kill something else or is flying it gonna burn something up?
Be gentle.
ML
