thermostat replacement

Old 12-07-05, 02:26 AM
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thermostat replacement

I have always noticed in repair manuals under replacing the thermostat they say to drain all the coolant out of the system, replace the thermostat, then refill. Is this really necessary. I need to change a thermostat but don't want to drain the whole system. I realize when changing you probably lose some of the coolant but not that much. Thanks
Old 12-07-05, 04:04 AM
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I've never drained it down to just change a t-stat.
Old 12-07-05, 07:17 AM
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You will lose coolant down to whatever level the thermostat housing is. If not flushing or cleaning the cooling system I just top the radiator off with antifreeze.
Old 12-07-05, 10:26 AM
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Just drain it down a little so that when you remove the T-stat housing it doesn't pour coolant all over the top of the engine. Remember that coolant tastes good to animals, but can poison and kill them.

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