[Cesar Ruvalcaba]

Help! Broke water pump screw. tried drilling and undoing with the screw remoing tool purchased at local auto part but tool broke inside the broken screw. Any ideas?

[oldbogie]

Originally Posted by Cesar Ruvalcaba

Help! Broke water pump screw. tried drilling and undoing with the screw remoing tool purchased at local auto part but tool broke inside the broken screw. Any ideas?

These are made from a hard tool steel, ordinary drill bits won't take them out.
You can try a carbide or diamond tip bit, these will work but are hard to keep aimed on the hard broken tool rather than the softer material of the bolt or surrounding part. Another option with better control is to use a Dremel type tool with a grinding stone, carbide or diamond grinding bit to chew the broken tool out of the hole. This will be slower but is a lot more controllable than twist bit.

Most decent size towns have a company that specilizes in such removals using an electric arc to burn the broken tool out. This usually isn't too expensive, but you've got to bring them the part.

Bogie

[Rogers Performance]

Put a flat washer over the broke bolt hole one with a hole slightly smaller then the bolt . Weld the washer to the bolt and then weld a nut to the washer most of the time the heat from the welding will heat the bolt and it should back out with a wrench. Let it cool first.