Is it documented anywhere on what's involved in doing the headgaskets on a 3.0 (1992)? I need to change the knock sensor and wire I know but is there a step by step list of what to do? Is it worth it to send in the injectors as well, I have 148k on the dial. Where do I get the gaskets, head bolts, etc...? New "O" rings for the injectors I would assume. I'll be doing the timing belt as well, I've done that before. Should I get the heads redone or just mill them flat? I had the HG's done (Toyota recall) at 48,000 miles. I get the air bubbles in the heater when I turn it on and it's been burped, they keep coming back. I also have a small coolant/oil leak from behind the engine that I can't locate. It looks like it's coming from the rear of the drivers side head. I'm going to be doing a compression test before I dive in to double check and see where I stand. Any other ideas from someone who's been there? Doesn't seem too hard, just complex, do to all the stuff that needs to come off. Thanks for your help.