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- Jan 31, 2010
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Ferrari first used a Goniometer back in the 80's to tighten head bolts. Basically it's just a device to precisely spec/measure how many degrees a bolt is turned once a certain, very minimal" torque is reached. Pretty much just ensuring the bolt head is "bottomed" This is common now with "torque to yield" bolts but back when Ferrari first did it, the bolts were "standard" bolts. The process produced a more consistent tightening than a torque wrench and does away with the issue/difference of wet/dry.
Here's a good video on the process:
Here's a good video on the process: