Hello, I am going to be replacing my air filter on the 86 4000CS. I was looking at it and it's kind of buried under some of the fuel injection and the owner's manual says you can damage it if you don't have the dealer do it.
Is there anything to watch when replacing it? Is there a speacial way to do it without screwing up the fuel injection part that sits over the top of it? Thanks for any words of wisdom anyone has on this subject.

...vaccum lines but don't rip out fi lines. I can't remember which car it was that I had to pull a gas line off, could have been ny 20vq. The box itself has four latches that pop off (i suggest you use a screwdriver to get the harder ones). the whole unit should come up enough to slip a new filter in. You may scratch you hand fighting with it but it shouldn't take you more than 20 minutes to make the switch. I did my 4kq, 20vq and my Urq at the same time in less than two hours. Go back a couple of pages on this forum, we had the same dicussion with a kid who yanked is whole fi system off. Not a good idea. HTH

Its very simple if you pull the passenger side headlight. After doing that, undo the air intake boot and remove it. Then undo the clips on the side of the airbox, I think there are 4. Grab a buddy and have him lift and move the fuel injection "system" up and towards the engine, and u can remove and replace the air filter.
The hardest part is struggling to get the headlight out, IMHO.

Mike

ok first things first easyist way is to take out the headlight. i know it sounds bunk and it is but its what ya gotta do its way easyer then trying to bend the filter in and damageing it. Refer to the bently on how to take the trim and light out.

then unbdo the lil clips.

then try prying the box uppppp with a flathead(what i did) and just kibda wiggle the lid till it come uppp enough to get the filter in/out

then put everything back togerther and presto.

i know its a pain in the ass. all our other cars just pop the filter out and done so audi screwed up that one for us but o well it practice takeing the lights out is how i looked at it

the the braket for the headlights is a bit of a pain but not overwelming.


the air intake boot is gonna be a pain to get back on and that was by far th most time consumeing part. also when its off why not wash it ;o) oh and wipe off all the oil under it . mine was filthy brothers was filthy so im betting youres is to

Thanks lots for the posts, I also ran into my cousin that gave me the car and he showed me how he did it the last time. So with all the inputs how can I go wrong...... wellll, don't answer that, I just might figure out a way to screw it up like take off the FI with a blow torch.. hehe...
I still laugh at how Audi placed it in a spot and made it as hard as they could to get to it. They must have spent long hours trying to figure out way's to keep the owner from doing their own tuneups so that they would be compelled to take it into a Audi mechanic to pay a lot for what should be a simple job. I still love the car though, It is a total pleasure to drive it. And when I get the basic's taken care of it should be real nice.
Got the lower A-arm bushings in the mail so I'm going to do those this week. Then see how it really handles without all the movement that is in the front end....
Thanks lots folks for the input....
Billcat