I'm looking for a little help to figure out why my number 4 EGT is usually 100 degrees hotter that my other EGT's. I have a RV6a with an IO-320 160hp Lycoming engine with an Advanced 5600 10" screen that shows all 4 EGT's and all 4 Cyc head tempts.
I have owned this airplane for 4 months and use it to commute to work. My commute is normally 3.5 hour flight. I usually fly between 8000' and 12000' msl. This is a new problems that just started with the last 2 weeks.
I usually fly lean of peak using Mike Buschs information and I realize he says not to worry about Higher EGT's. However my #4 EGT is much higher than the others. Yes, the cylinder tempt is well within limits at 343 with the EGT being 1458 (in the Red). (#1 330/1365, #2 357/1380, #3 353/1320, #4 343/1458) its certainly annoying since it sets the alarms off on the display screen both visual and audio. The number #4 EGT has recently went above 1500, above the limits on my screen. I was at 11300 msl and an OAT of 40F, on last weeks flight. Yesterday, taking off and flying at 2500 msl I saw almost a 200 degree difference in tempts. #4Cyl head of 339 (good) with an EGT of 1551 super high. The other 3 EGTs were 1376/1393/1331. 3 hours later into the flight at 8500msl an OAT of 52F #1 329/1380, #2 351/1383, #3 350/1328, #4 341/1495.
Can I clean or replace the probe? or is there other trouble shooting that I should look at?
V/R Brent
I have owned this airplane for 4 months and use it to commute to work. My commute is normally 3.5 hour flight. I usually fly between 8000' and 12000' msl. This is a new problems that just started with the last 2 weeks.
I usually fly lean of peak using Mike Buschs information and I realize he says not to worry about Higher EGT's. However my #4 EGT is much higher than the others. Yes, the cylinder tempt is well within limits at 343 with the EGT being 1458 (in the Red). (#1 330/1365, #2 357/1380, #3 353/1320, #4 343/1458) its certainly annoying since it sets the alarms off on the display screen both visual and audio. The number #4 EGT has recently went above 1500, above the limits on my screen. I was at 11300 msl and an OAT of 40F, on last weeks flight. Yesterday, taking off and flying at 2500 msl I saw almost a 200 degree difference in tempts. #4Cyl head of 339 (good) with an EGT of 1551 super high. The other 3 EGTs were 1376/1393/1331. 3 hours later into the flight at 8500msl an OAT of 52F #1 329/1380, #2 351/1383, #3 350/1328, #4 341/1495.
Can I clean or replace the probe? or is there other trouble shooting that I should look at?
V/R Brent