Sound deadening a 306

[Niall]

Doors:
I've done my doors with a combi of cloud 9 and silent coat.
We all know 306 doors rattle big time and you need to reduce these first before deadening the doors. No point of covering up a problem. The main two rattles are the door lock and the exterior rubbing strip.
If your door lock rattles, use white lithium grease and cover all the moving parts. It's messy but it keeps everything lubed up and stops the mechanical parts still nicely. Make sure all wiring is clipped to the door where it should be and it might be an idea to get the Hoover in the bottom of the door to get rid of all the rattling crap in the bottom!

Using small squares, dot some patches of silent coat around on the outer door skin. You don't need to do the entire door skin as we are only trying to weight the panel to stop reverberation.
Next, do the inner door skin. Remove all the foam covers and clean up the door. You will want to cover the entire door here making sure you don't cover holes for the door card clips.
You will never seal a door completely but the better you do, the better sound you will get and that is the main reason for covering the entire inner door skin. Not only that but also, this is the panel that rattles the most. Remember to heat the silent coat before applying it otherwise it will all fall of eventually.

Now, take your door card and a suitable size piece of cloud 9. Glue down the cloud 9 working it into all the grooves and holes. Don't cover the big chunk of foam on the card (like I did at first in the photo) otherwise the card won't go back on. Leave suitable gaps for cables and the mounts and try and keep it all trimmed around the trim clips. Glue it down paper side down. It's the foam side that absorbs the sound mostly so we always want this facing outwards on the car.
Refitting the door card is a VERY tight fit but it does work well as it also helps to stop various rattles on the card and absorb road noise. Once it's on, you won't want to take it off again!



Next: roof. Most people overlook the roof but doing the roof makes a massive difference to road noise and also heavily reduces very low, reverberance in the car that you get with low bass.