Posted by Hugh MacKay on September 15, 2008 at 14:58:48 from (209.226.106.143):
In Reply to: Re: 47 SA radiator posted by chesshircat on September 15, 2008 at 14:26:34:
Pressurized or non pressurized and thermosyphon are two different items. There were both pressurized and non pressurized thermosyphon systems. All A, B, C and SA up to serial number 336711 were non pressurized thermosyphon cooling systems. SA after 336711 were pressurized thermosyphon cooling systems.
Thermosyphon is nothing more than the cooolant circulation system. The cooled coolant entered the engine through bottom radiator port, as the engine heated the coolant it rose to the top and back to radiator through top port. This system had no water pump or thermostat, coolant flow was controlled by size of radiator core. The cores are a specific size for that
Water pump cooling systems use a thermostat to controll coolant flow.
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