Cirrus SR22 G2 — Service Bulletins

This document is an article from AOPA Pilot, focusing on the management of cylinder head temperatures (CHT) in piston aircraft engines, particularly in the context of the Cirrus SR22. It discusses the importance of maintaining reasonable CHT levels to ensure engine longevity and prevent catastrophic failures. The article provides insights into optimal CHT ranges for different engine types, diagnostic methods for high CHTs, and adjustments that can be made to improve engine performance. It is aimed at pilots and aircraft owners who seek to understand and manage their engine temperatures effectively.

• Maximum CHT for Continental engines: 460°F; for Lycoming engines: 500°F.
• Recommended CHT targets: 380°F for Continental, 400°F for Lycoming.
• Common causes of high CHTs include running too lean, cooling airflow issues, and advanced ignition timing.
• Adjust CHT targets downward by 20°F in cold conditions or with efficient cooling systems.
• Ignition timing should be set accurately, typically between 20° and 28° BTDC.