Complete Repair Documents online
If you need repair information IMMEDIATELY and none of the 10w40.com articles could help, the fastest, cheapest solution is $25 for Alldata's online service manuals and Technical Service Bulletins.
Even if you decide to take your car to a mechanic, the included shop hours estimates let you know in advance how much you should be charged for the repair. This info alone is worth the $25 !!!
Alldata.com

Toyota 1990 Supra Factory Service Manual
Brought to you by: freesite      Article Usefulness: Very High   Complexity: Medium   
The complete 1990 Toyota Supra factory manual - all scanned into GIF files and put online. Includes full diagrams of all systems including the electrical systems.
Keywords: car, truck, auto, fix, repair, service, manuals, toyota, supra, mfg, book, instruction, factory, online, free, manufactor, mechanic, service

Nissan 300ZX Service Manual Online
Brought to you by: 300zx-twinturbo.com      Article Usefulness: High   Complexity: High   
Nissan 300ZX Online Service Manual (z32) online
This is the whole service manual, scanned in. Site is focused on twin-turbo model, but it isn't clear what year the manual is for (doh!)
Keywords: car, truck, auto, manuals online nissan 300zx

Nissan technical service bulletins 2002 Altima - Sentra - Maxima
Brought to you by: altima.net      Article Usefulness: High   Complexity: Medium   
nissan altima technical service bulletins and problem diagnostics procedures // 2002 Nissan Altima - Sentra - Maxima
Keywords: car, truck, auto, manuals online nissan technical service bulletin