Today I took the cowl off for an oil change and other maintenance where I discovered a thin but good size (about 1/3 the pipe) crack in my number one exhaust about 4-5 inch from the header. Recently, about 5-6 tac hours ago, I have seen that my #2 EGT peaks up before my #1 which was the other way around before. The temp difference has not been much 10-15F at most but my #1 cylinder consistently peaked second which was not the norm for my setup (it was always the hottest before). I was suspecting other issues, maybe a bit of clogged injector or the gasket in my intake or the prob iteself but now I am wondering if the crack has been the source of this change.
Today for warming up the engine before the oil change, I went for a short flight and during my mag check, I leaned much more to see if the EGTs misbehave, they did not though #1 was still lagging behind (again compared to norm).
On the exhaust pipe issue, I called Larry Vetterman to see if they sell only the part that is cracked instead of taking it to a welder and he informed me that there has been a recall on this type of exhaust (for IO-360-M1B) and he had me to send it in to repair it (for free) great service, great person.
Today for warming up the engine before the oil change, I went for a short flight and during my mag check, I leaned much more to see if the EGTs misbehave, they did not though #1 was still lagging behind (again compared to norm).
On the exhaust pipe issue, I called Larry Vetterman to see if they sell only the part that is cracked instead of taking it to a welder and he informed me that there has been a recall on this type of exhaust (for IO-360-M1B) and he had me to send it in to repair it (for free) great service, great person.