'68 318 - Coolant left in heads when removed.
Need to drain each side of the block before removing heads or you will have a coolant bath.
Use a 9/16” 6 point socket on the plus so you don’t round them off. Best to use a 1/2” drive breaker bar to get them loose. Try tightening also to pop them loose.
Factory block plugs were a 9/16 hex. Aftermarket could be an Allen head or a square head. Don’t use pliers or a crescent wrench, you will ruin the head and not get it out. They do sell 8 point sockets for square plugs.
Use anti seize compound when they go back in. And they don’t need to be tighter than 30-35 ft lbs.
Need to drain each side of the block before removing heads or you will have a coolant bath.
Use a 9/16” 6 point socket on the plus so you don’t round them off. Best to use a 1/2” drive breaker bar to get them loose. Try tightening also to pop them loose.
Factory block plugs were a 9/16 hex. Aftermarket could be an Allen head or a square head. Don’t use pliers or a crescent wrench, you will ruin the head and not get it out. They do sell 8 point sockets for square plugs.
Use anti seize compound when they go back in. And they don’t need to be tighter than 30-35 ft lbs.
