I need to run cables through my firewall (the wall between the engine bay and the seating area) but I can't seem to find any factory placed holes to pull cables through.
Now a lot of people told me its pretty easy to find a place to drill through safely, drill a hole through the firewall and then seal it off so water can't flow through. I agree with them but is there a good and smart way to do this?
- Specific drill(bit) to use?
- What kind of sealant to use?
- Do I need to apply some anti-rust of any kind?
- Any other suggestions?
TLDR; What do I need to pay attention to when drilling through the firewall?
PS. I don't know the proper name of the metal sheet that's between the engine bay and seating area, since its goal is to stop fire from spreading I called it a firewall (feel free to improve if you see fit).