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Hot take: I was wrong about the torque spec for Honda crank pulley bolts
The manual for a 2012 Civic says 181 ft-lbs, but I found a TSB from a Honda tech forum showing it should be 94 ft-lbs plus a 90-degree turn. What's the most surprising spec you've ever found?
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west.anna5mo ago
That 94 ft-lbs plus the 90-degree turn thing is wild. My buddy rebuilt an old Ford 300 straight-six and the manual said something like 60 ft-lbs for the head bolts. He found a factory service bulletin that basically said "ignore that, torque to yield, just turn them another 180 degrees." He was so mad he'd already bought a new torque wrench for the wrong spec.
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the_margaret5mo ago
Yeah, the Ford 300 was 80 ft-lbs, not 60. Then you did the extra 180-degree turn on those old torque-to-yield bolts. That bulletin caused so much confusion.
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josephl675mo ago
See this all the time with old manuals and service updates. @the_margaret is right, that 180-degree turn spec is a classic example. It's like the people writing the book and the people fixing the problems later never even talked. Makes you wonder how many engines got put together wrong before the bulletin came out.
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