* Drill with a set of drill bits
* Safety goggles
* Hammer
* Punch
* Socket wrench
* Replacement bolt and gasket
1. Wear safety goggles. This will protect your eyes from any debris that may fly up while you are drilling.
2. Use a hammer and punch to center the broken bolt. This will help to prevent the drill bit from slipping and damaging the thermostat housing.
3. Start with a small drill bit and gradually increase the size as needed. This will help to avoid damaging the threads in the housing.
4. Drill slowly and carefully. Do not apply too much pressure or the drill bit could break.
5. Once the bolt is drilled out, use a socket wrench to remove the old bolt and gasket.
6. Install the new bolt and gasket. Tighten the bolt until it is snug, but do not overtighten it.
Here are some additional tips for drilling out a broken bolt:
* Use a cutting fluid to lubricate the drill bit and help it to cut through the metal.
* If the bolt is particularly stubborn, you may need to heat it up with a heat gun or torch before drilling it out.
* Be patient. Drilling out a broken bolt can take some time and effort.
