I have a coolant leak, and it's in a crap spot.

The flange on the thermostat housing that bolts to the block has two or three 5mm hex bolts in it, including a shorter one. This shorter one doesn't tighten up on my car....and the bolt is fine, so it's the block that has been stripped.

To give an idea on how quickly it leaks, I'll fill it up and it will be 10 minutes before the coolant light starts to flash on my cluster.

Help?