I have a 2002 aztek and it blew the headgasket, I wasn't sure about it initially and I spent alot of time trying to figure out what was wrong with it and lots of money on antifreeze and other crap. I was desperate due to my job required me to drive my car daily and it was early november in pennsylvania and freezing cold last year. I'm a pretty good back yard mechanic, but if it wasn't for your complete breakdown on how to accomplish this, I would of never took the chance to do it. My vehicle would overheat sometimes and at other times it would n't. Finally, it would just overheat just about all of the time. I had it checked out and was told that the headgasket was blown. I did the typical stuff hoping that I would not have to have the repair done. I used head gasket repairs, some worked for a little while but most failed after a week or two. I got desperate and bought this head gasket repair goop that cost $60.00 dollars a bottle and really messed things up. I read your post about 10 times, watched a guy do it on youtube and finally took the plunge in the freezing cold!!! It took me two weeks due to doing it at my parents house and only being able to stand working on it for about an hour at a time. Warm up and go out and try it again. It was like having a second job!! Most of the time spent was reviewing your steps and taking things apart, matching nuts and bolts with parts and trying to have hands like a chimpanzee to get into those tight spaces. One of my biggest mistakes was not taking out the radiator. It was hell trying to remove those bolts, I would never do that again!!!!! Take his advice and remove it. Also, I broke the little nipple on the powersteering pump and had to replace that. It was a bear to get that bugger back into the slot for it. Also, I spent alot of time second guessing myself and backtracking at various points. There was a few times that I wanted to run down the street screaming I got so frustrated at times. When I finally got the heads off, I had to clean out all of the gunk from the that expensive head gasket fluid. especially inside the water jacket at the lower intake manifold. use the cheap stuff " the silver or copper stuff" if you have to keep it going till you can take the time to get the job done. My suggestion is to let an antifreeze bottles worth of coolant out of the system. Put the sealer in the antifreeze bottle and shake it up real good and then put it in the radiator. Don't put anything in the radiator tank. The one thing that drove me nuts was the little metal shims for the header in the back. What a pain in the butt, but I finally got smart and put permatex on them and let them harden together and put the on. getting those bolts back in was hell in the back. Also, the number one spark plug was hell to get out and had to have new threads put in, but the head shop messed that up and when I got it back together, it was saying there was a misfire on that cylinder. Finally figured out how to fix it. There are these thing called "indexing rings" that racers put on spark plug threads so that all of the electrodes are pointing the same way. put one of those in with some permatex red hardening agent. Bang, runs like a brand new vehicle. I have also replaced the heater core in my car. What a pain, but I will let you know that the easy way is to take a box cutter and cut the plastic duct in the back and after you fold yourself in half to remove those nuts under the dash you can take it out without removing all of the stuff between the seats. It is a small space to work in but it can be done. The aztek is a fine vehicle, if you are willing to do the work and get familiar with the vehicle. Don't buy a versatek though unless your rich or own your own tranny shop. Thanks again for you attention to detail on your teardown. But I would suggest that a person start with removing the rear manifold before they start the teardown. I have done the following repairs: Head gasket, altenator, power steering pump, brake line under the engine, spark plugs and wires, fuel injector replacement, fuel filter, tie rod ends, wheel bearings, brakes: fron and back, heater core, replaced the ignition switch; ask me about that sometime, it was hell until I came across the easy way to do it in about 15 minutes. I have been thinking about buying two more if I can find them at the right price and re-selling them.