Go with the beam torque wrench for engine rebuild.
I do use a "clicker" for lug nuts, just easier to
"feel" but I hate using it on a engine rebuild.
Many moons ago I built a simple "calibrator".
Nothing more than a piece of steel - 2' long from
the center to the end. It would pivot on a bearing,
and had a socket head on the "pivot end". Other end
would attach to a string holding a small bucket...
into the bucket went scrap metal. So with 25# of
scrap metal, 2' length, and the bar HORIZONTAL when
the weight was lifted... I had a simple way of checking
my torque wrench.
[Note, the 25# figure was really less 1/2 the beam
weight, and less the weight of the bucket. I did
a similar thing with a plywood wheel and string...
to calibrate a 6 in-0z torque measurement. Nice thing
about the wheel... string would always be 90 degrees to
the torque, so no sin/cos error.]
Yes, there were some errors involved with it, but
did the trick. My beam wrench was pretty accurate.
My click wrench under read by 20% towards the high
end.
Tom
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