Do you put drill a small hole in your thermostat?

MOPAROFFICIAL said

Many come with the riveted bleed hole.

Some people simply loosen the heater hose to get the initial air pockets out.

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THIS!! Remove heater hose on intake connection, I usually try and remove at heater and "rig" hose up in air or add a scrap of hose. Fill until you "hit water" and reconnect hose.