Inliners International Forums General Discussion Engines 250 block coolant drain.

Is there a coolant drain hole/tap somewhere I am missing on a 250? I want to flush the block but I can't seem to find a drain point.

There is a small drain plug drive side Not very big either a 1/2 or 9/16 plug. But there is a Flush kit that you can buy and install into the heater hose lines. to back flush the block Or you can back flush through the upper Rad. hose. Best to take out the thermostat back flush thought and take off the lower Rad. hose to let it drain.

There is a flat area down the back end of the block which may be where it was supposed to be, but there is no hole on that side of the block.

After contorting under the engine I found a 3/8" plug under the manifold which is the one.

That be it.