Type of improvement: Coolant water overpressure valves
Explanation of proposals: Implimentation of coolant water overpressure valves. VO101_Tom has entered a feature request at
http://www.il2bugtracker.com/issues/30 for Bf 109E series, but this was present on many aircraft. Historically there was a valve that lead away coolant glycol steam when pressure become critical.
Benefits: Improved gameplay immersion, historical accuracy, preventing immidiate damage to engine, visual feedback (whitish steam over cowling) of critical water temperatures.