Raze wrote:
The best guide is a wrench + time + a car you can disassemble / reassemble without relying on it for transportation. Think of a project car as a cadavre, the more time you spend doing various procedures, the easier working on any vehicle will become...
but yeah, for general procedural knowledge grab chilton or haynes, factory service manuals are really nice but can be $$$ if you can even find them, unless someone's eBaying them on CD, got the FSM + Electrical diagrams for our XR4Ti off there for $8 shipped, it's worth many, many times that...
QFT!
I had done some various tasks for years... brakes, oil changes and what not... but didn't get serious until I met my g/f and her '97 M3 back in 2002... Next thing I know, I'm replacing suspension bits and doing a full Inspection II on the car, mainly using a Bentley manual as a guide... 8 years later and there isn't much I won't attempt, but some hi-lites: clutch and transmission replacement (twice) in a (new) MINI; complete tear-down and restoration rebuild of the engine bay of a Volvo 1800ES while doing a auto-manual conversion; installing a custom, aftermarket wiring harness in a Spitfire; Timing belt change in a TDI (a fairly involved job, now done 2x); and more MINI's torn apart and put back together than I can remember...
FWIW, if you only work on one car, you can usually get away with a minimal collection of tools... but when you start working on a lot of different cars by different makes and from different eras, you begin to understand why pro wrenches have $50K+ worth of tools...
Also, I generally consider myself an "advanced" DIY'er... which means I'm a better than average "parts replacer"... but when it comes to diagnostics, that's where training and experience come into play and I find myself lacking.