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I've got 16 years experience and a degree working on diesel / heavy equipment. Now and again, I do pass on the torque wrench. I know some people obviously disagree with this, but a little common sense and experience will often times suffice. Or maybe I'm just really lucky.
i have 30 years pulling wrench's, and use common sense on a lot of things too. but after seeing 3 spark plugs blow out and destroy the heads after "perfeshionals" did not use a torque wrench, i take fords word for bible truth, and do what they say when it comes to spark plug torque on the mod engines. and i have not had any blowouts on the 8 mod engines i maintain.
I think it has to do with it being a "modular" family of engines, v6, v8, v10, all of which share some common design features, dimensions, and parts. Like all would use same valves, pistons, con rods, COP's, etc
Actually, the name 'modular' came from the fact that the plant and its tooling could be changed out in a matter of hours to manufacture different versions of the engine family; not due to shared engine components.
Yep, right there in Wiki. Cool pictures in there too, (Go to full screen too). I guess the name is one of those names without any real significance that keeps everyone wondering.