Adding an air bypass baffle modification to cylinder 5 on a Lycoming IO-540
The back right cylinders on Lycoming engines are always the hottest on Van’s RV planes. I’ve not had any major issues (with CHT temperatures) on cylinder 5 until recently. Departing Las Vegas at 6:45am in 90+ degree temperatures it took a lot of playing with my climb rate and oil cooler dampener to keep the CHTs in line, and even…