in your case it looks like it's set up for heater hoses the connection on the thermostat housing appears to be above the thermostat, as for a bypass most of the time they are to prevent air locking of the pump or thermostat,Detroit had petcocks on the thermostat housing never had to open one until one night we blew a radiator pipe coupling hose on an 8V71 in a bus it had two separate radiators, two water pumps, one filler cap couldn't get it to take water on the closed side it would try to get hot idling, after myself and the field mechanic had ran out of things to try the man that hauled fuel for us walked by an opened one of the petcocks it swallowed the water and we were able to fill the system one of the pumps was air locked never had that before ,but the radiators were mounted above the engine one on each side
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Today's Featured Article - Show Coverage: Central Illinois Strawberry Festival - by Cindy Ladage and Janna Seiz. Every year the coming of summer is highlighted by different events for different people. For some, it is heralded with the end of school, tilling the garden, or completion of the planting season. To us, connoisseurs of find food, antique tractors, farm toys, crafts, and downright fun, the annual Strawberry Festival means summer is here. Every year, in Carlinville, Illinois, the Macoupin County Historical Society and the Macoupin Agricultural Antique Association team up to fill th
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