I took off the manifold gaskets and cleaned as much of the crud out of the exhaust manifold as I could. Then I took off the valve covers and rocker arms and injectors/lines. You have to remove the clamps on the lines or you will not be able to remove the lines out of the injectors or move them out of the way for that matter. The injectors were stuck in the ports. The TMs have a DIY slide hammer for the job, but it was not needed. I used a small rubber mallet and tapped the bottom flange. DON"T BEAT ON THEM! It will take time, but they will loosen up. The injector by the compressor was more work because there was not a lot of room, so I used the handle on a crescent wrench-JUST TAP TAP TAP! Then I started on the head bold nuts.... What a pain. I heard of guys spinning the bolt so I loosened at an 1/8 of a turn until they spun freely. I worked on them in this sequence, 1. Passenger Side, 2. Middle, 3. Driver's Side. The Passenger Side and Middle, I used a breaker bar and an impact socket. REMEMBER: TURN IN SMALL INCREMENTS!!!. For the Driver's Side nuts, I DID NOT USE THE HEAD WRENCH! I didn't want to break it loosening them up. Instead I used a closed end box wrench that had a about a 30 degree bend at the ends. STILL WAS A PITA! I just used a bigger rubber mallet to loosen the nuts. TOOK FOREVER! The nut that gave me the most headache was by the firewall. I got it to a point where I thought I could loosen it with my fingers, but the thing fought me until the bitter end. Turning probably a 1/16 at a time all the way up. Then I ran out of room and could not put the wrench on the nut, so I had to use a flat head screwdriver to spin the nut, then use the wrench, then the screwdriver, then the wrench. Just used the head as a brace for the screwdriver and torqued it against the angle on the nut. I did remove the oil cooler to get at the nut behind it. Then after about 1.5 hours they were off. UGH.