1984 Jeep J10 2 things - Insulation Mat and Starter motor /

Engine Mechanical problem
1984 Jeep J10 6 cyl Four Wheel Drive Manual

Thanks for your help,

The thick insulation mat under the hood of my ute came down the other day. Do I need to stick it back on to stop warping of the hood or anything else (like overheating)? And what should I use to stick it on, obviously I can't use a flamable glue.

The other thing is that I may have to replace the starter motor sometime soon. Is this very difficult? If I'm careful and mark the wires etc, I should be ok?

What is the solenoid? I keep getting told I have an "intermittent solenoid problem". Basically the old beast doesn't always want to start (particularly when there is a chance the engine is damp from humidity or really cold in the mornings). If I replace the starter motor, am I still going to have a problem with this solenoid, or will I heve to replace something else too (probably sopmething more costly!)

I think I'm fairly handy under the hood of this thing and am keen to have a go myself if I can, but only if you think it's worthwile.

Cheers,
Adan