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Well they are not the easiest thing to do; to start you have to get the old one off. To do that you really should pull the pillar cover off so you can get at the tab (the factory Q panel has a portion that goes up under the pillar and is a pain to get at with it in place). Then you have to cut a line back by the gas door since the factory unit was a one piece; make sure you leave enough to fit up to the replacement when the time comes. Then you have to get the old one off; it will be bonded to the chassis and care must be taken to get it off without breaking anything that stays. The best advice is to go slow and be careful; you will get it but it takes some time. My race car is sitting with the driver’s side Q panel removed if you need to see what it looks like under there...
Instead of mixing some up by hand I bought a tube of (brand name) EVERCOAT maxim adhesive. You can put it right in a caulking gun and use it to bond the quarter panel on. It comes in slow,medium or fast setting time. I bought the medium so I had time to align everything before it set up. The adhesive and hardener are both in the same tube so you pierce the foil on both sides at the top of the tube and it mixes as it comes out the tip. Cool stuff alot less mess. An auto body supply should have it. Pipe
Someone had a whole new rear clip, in a box, for sale awhile back.
Posted some nice pictures that show all the seams and substructures you will have to deal with.
Might help to look them over
I used a hammer and sharp flexable putty knife to cut the bond under the B pillar. A sharp wood chisel to cut the rest of bonds.
Be sure and look at how the hatch glass and bumper line up with the 1/4 before you remove the old one. First time I did one I was really bummed when I shut the hatch and the gap was not even. Then I looked at other C4s that were never crashed. Mine was better.
I remembered a magazine article that I pulled out on this, when I did mine.
Had a little time to scan it in for you, but this %$#& website.
I can't log on to my homepage to save them full size.
Argggggg ... it keeps logging me out here to
Anyway, here they are (smaller) in phpotobucket, hope you can read them....
I don't know how bad your quarter is but they make patch panels and you don't need to replace what is not dammaged .
That helps with the pillar and hatch issues.
There are books that detail repairs for sale.
I recommend poly original bumper covers.
Make sure patch panels or qtrs are SMC which cars built after 1972 use.