Sucks about your Dad's 4Runner, Martin. A friend of mine is from Detroit, with roots in the auto business. She's not allowed to even consider owning anything other than American. Hopefully your dad will give it another go. Sounds like a freak occurrence.
Your post had me dig up the history of the VZ engines. Fascinating... http://en.wikipedia.org/wiki/Toyota_VZ_engine
p.s. check your pm's when you have a minute.