07-08-2019, 10:16 PM
Before we get all excited and dramatic about Torque wrench accuracy consider this, take a sample of all the bolts tightened by a myriad of owners without torque wrenches and see what range you get...... a dam sight more the the range of those using torque wrenches I wager. Maybe someone who regularly fits heads and who has a good feel can achieve consistent results, but I doubt many can. Another point besides the actual pressure applied is the consistency of tightness across the head, this is where a torque wrench scores. Chris has made note of lubrication, it is also worth repeating that Nuts/Bolts should run up freely along threads with your fingers, if you need to use a spanner the thread is dirty or damaged and you will not achieve consistent torque results.
Black Art Enthusiast