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425 V-8 `78 Deville-- Cooling system self bleeding or not?

2476 Views 6 Replies 4 Participants Last post by  larryinalabama
Been thinking of changing coolant in my `78 Deville 425 V8.
Is it self bleeding or not?
If not--what`s best way to get air out of system?
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No bleeding necessary but the level will drop after the thermostat opens. Run it a while. When the level drops top it off.

ALWAYS change the thermostat when doing any cooling system work that requires draining. A crapped up thermostat is one of the easiest ways to ruin an otherwise good engine.
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