The Stovebolt Site Forums The Shop Area Engine Shop 235 engine block coolant drain.

I found joy. Without tearing the engine apart. Thanks for all the suggestions.

After cleaning all the major points around the cylinder walls and got clean water running thru. The drain remained.

I took a 1/8" steel cable and cut it to about 18" in length. Put about 2" of shrink wrap around one end. Cut a 12" piece of 3/8 copper tubing and put the cable thru it. Put the shrink wrap end into my drill. Running the drill backward (CCW), the cable stays intact. Running it forward (CW), the cable begins to splay out like a wire brush.

After a little prodding and wiggling in the drain hole with the cable running mid speed, got a little hole up into the block. A few drops came out. Then reversed the drill (CW) and essentially made a steel brush out of it. The gunk came out like a deer in church. Ran that wire brush in/out for about 10 minutes. Then hooked up a water hose to the drain and got quite a bit of gunk out of the water pump hole.

Hooked up a lever action drain valve as shown in the picture. Also drilled a small hole in the new thermostat.

Nailed everything back together, filled her up and ran the engine. Water flowed clear, drain drained clear and fast. Me be a happy camper.

I appreciate all the good advice. Couldn't have done it without it.