22-07-2019, 11:34 PM
As long as the engine is submerged boiling is unlikely to be damaging.
The main threat is probably to the core if the overflow pipe is not of adequate diameter. Because of the loss of water due sloshing, often been pinched near closed.
From the days of the Model T the folklore is that retarded spark causes overheating. But from experience with other makes excessive advance very often the factor. (not so likely with harsh Sevens).
At higher cyl temps cyl wear to all intents ceases. Even the humble Bradford, with no fan, and very prone to boil, was fitted with a thermostat.
The main threat is probably to the core if the overflow pipe is not of adequate diameter. Because of the loss of water due sloshing, often been pinched near closed.
From the days of the Model T the folklore is that retarded spark causes overheating. But from experience with other makes excessive advance very often the factor. (not so likely with harsh Sevens).
At higher cyl temps cyl wear to all intents ceases. Even the humble Bradford, with no fan, and very prone to boil, was fitted with a thermostat.