Drain radiator

I drained my rad of water to set for the winter in the race trailer. We only run water at the track. Its the rules. You dump antifreeze and you are out for a couple weeks.

So After winter I backed the car out of the race trailer and and two of my core plugs were setting on the floor one from each side. I have braded hoses and the lower was off to drain it. When we reinstalled the core blugs we put drains in the block. I believe if it was a factory block and not an extra thick high nickel race block it would have cracked into the pan as I have seen many that come here do. Pull the drains plugs out of the block on each side and install pet-cocks.

Don't just count on it nit to freeze with just draining the water. Also take a heater hose off and blow the core out or it will also freeze and swell the core. Even if it doesn't leak it won't blow air through the core after it swells and you heat won't be hot.