Originally Posted by mantonas
my son's Polk speakers did not look like yours (they were on rectangular plastic plates, with a 4" round speaker and a tweeter); if you had been using the exact same speakers as his, you would have definitely grabbed my attention.
I installed 4x6 oval speakers when I did that write up. The OP put in what's referred to as Plate Style speakers. There isn't a template with measurements, I just used the old speaker as a guide.
Drilling out the studs makes a lot of sense if you want to avoid removing lots of stuff, folding the windshield or having to jam your hands up behind the dash and awkwardly put a socket on the nuts. The CFE Kit with Kicker speakers is the one that comes with a drill template. They only have you drill out one stud per side (the one that's hard to get to.) They supply a neat little wrench they call a Speed Nut Tool so you don't have to use a regular wrench or socket. It looks like a thick washer with the right size hex hole in the middle. It's a pretty cool way of dealing with the dash speakers. Check out the install sheet here...
If you had the template or could locate the stud locations here's the procedure. This involves drilling out all the studs.
1. Drill out the studs. This lets you remove the speaker without having to reach behind the dash with a socket or wrench. It should just drop down.
2. Remove the old speaker, remove the nuts and the studs. Remove the wiring.
3. Take your new speaker and put it face to face with the old one. See if the mounting holes line up. If not mark where they should be and drill new ones.
4. Put the new speaker behind the dash to see if it fits in the space and if the mounting holes line up. Trim as needed. You can use the old speaker as a template.
5. Once you're happy with the fit and the mounting holes line up nicely use 4 Speed Clips if you can or epoxy 4 lock nuts on the back of the speaker behind the mounting holes. Make sure you don't block any threads with epoxy. Note that you may need to use a spacer ring.
6. Wire up the new speaker.
7. Pop the speaker behind the dash, align the hole and tighten up the screws. Be gentle if you used epoxy so the nuts don't break off.
Yeah, you now have 8 screw heads showing on your dash but just paint them. If all went well this could take as little as 15 or 20 minutes a side.
If anyone can create a template I think the YJ community could benefit from it.