I've never know a 'mechanic in a can" to ever work.
You most likely have a blown head gasket, stuck thermostat or something like that.
Remove the thermostat and see if this steam goes away. It appears the engine is overheating and when you open that bleeder you get steam or boiling coolant/water.
If it still steams like that after the thermostat is out, you may have to replace a head gasket.
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Wednesday, May 29th, 2019 AT 1:32 AM