I put in an 8-probe EI engine analyzer in my Cherokee 180 a few months ago (4 CHT and 4 EGT probes). The EGT spread varies from ~1320F on Cylinder 1 to ~1120F on Cylinder 4 (4000 feet at 2450RPM is typical). The Hottest to coldest EGT spread is around~ 140-200F depending on cruise and altitude. This is a carbureted O360-A3A. The hottest EGT is always Cyl1 and the coolest EGT is Cyl4. All CHT's are relatively consistent at ~300F. (289-308F spread).
The engine appears to be running fine ... 200 hours after rebuild.
All temps remain within reasonable bounds. I was just wondering what would cause cylinder 4 EGT to be so much colder than the others? (assuming it is not a faulty probe and it is installed correctly. )
The engine appears to be running fine ... 200 hours after rebuild.
All temps remain within reasonable bounds. I was just wondering what would cause cylinder 4 EGT to be so much colder than the others? (assuming it is not a faulty probe and it is installed correctly. )
