Well I did this maintenance today on my N52 engine(mainly because I've been having rough idle). Took about 2 hours(including breaks to smoke, drink some milk, watch some tv with my dad, and recover my back every 20 minutes from bending over[seriously working on this engine way down there is killer on my back].) I was thinking maybe I should have taken pics but oh well... After taking apart the entirety of the intake including engineering my ratchet wrench to a star driver so I could remove the 4 screws holding the adjuster unit in and the screw on the cable plate thingy and the screw on the resonator. After getting all of the bits and pieces of intake tubing out of my way that were necessary I finally got to the 4 screws on the adjuster unit. This was I pulled out my modified ratchet and went to work getting those screws out and to the side neatly placed on my work bench noting which screws came out of each hole just in case there was any variation.
Now I was ready to pull the adjuster out and discover any damage or carbon build up. I tugged, and pulled, and finally it popped out a little just to get stuck on that silly wire holder thing. After taking a break to relax my back and drink a big glass of milk I came back to the project excited to get back to work. I unscrewed that bracket thingy(just the screw at the top and turned the bracket). Now I was ready again to see what it looked like and I really should have taken a picture! It was emaculately clean with no play at all in the mechanism... :headbang: ..
Ok, well after figuring that out I went to take a break and show my dad how clean it was and then came back and put everything back together.. well except for the main tube.. I couldn't get it put back on the resonator. So I took it out and examined the situation of course after almost killing my arm and back trying to get that little tube back on. I decided to go get my star modded wrench again and pull out the resonator. After doing so I needed to use the bathroom so I gave the main tubing and the resonator to my dad and told him to connect them... I get back and he says he couldn't do it. So I examined it a bit more taking note of the design with the little nitch on the bottom to lign up with the nitch on the tube etc.. After a little toying around with it I finally got it on and suprisingly with less effort than I had been.(idk maybe I was trying too hard)... I went back to the z4 and put everything back together also taking note of the little nitches in which the metal screw parts of the clamp fit in. Everything is now nice and tightly fitted into the car. I started her up and let her idle for 10 minutes without the A/C then 10 with. Drove an 8 mile round trip and she seemed to be driving pretty decent but it kind of sounds a little different. The idle also seems to be a little more balanced but still rough around the edges. I know that there is a second adjuster unit on the exhaust manifold side of this car and am wondering if it may be dirty.
So a little while ago I went into wal-mart and got some seafoam. Poured it into the gas tank(well some of it went down the side of the car cause it wasn't going in very fast and I was getting impatient). Gonna put some in the oil tomorrow too and get everything nice and clean on the other sides of things.
If by the next oil change the idle doesn't level out good I'm probably going to take it in under warranty and see about it.
I also find it kind of odd that I didn't do anything and she sounds less whiny and more roary(she went from whiny to upset).. i don't get it... maybe it's just in my head though.(probably just dreaming it up) I'm sure I'll drive it tomorrow after she takes a nap and she will sound normal...
