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FAQ: Valve Adjustment

141K views 237 replies 72 participants last post by  SoakedKarma  
7 ft/lbs.... Can you even get a torque wrench that will read that low? Lowest I've see in 120 in/lbs (10ft/lbs).
What I would do is hold my wrench on the bolt, and then put a foot long length of pipe on the end of it and slide it all the way to the edge of the bolt. And then I would take a seven pound weight (Variable weight dumbells of course, or I could only do one torque rating. This situation would call for a 2.5 pound handle and 4.5 pounds of weights. That I would achieve by adding two each of two pounds and quarter pounds.) and attach it to the hole I drilled in the end of the pipe using wire. Naturally, this would only work if the wrench was being pulled in the direction I want the force to go, so my bike would be on it's side, making the valve cover bolts orthagonal to the ground. Alternatively, I could use a pulley system to change the direction of translation to be transferred to rotational motion so I could leave my bike standing up. Also, if you don't have the required weights, you can always use a block and tackle.

Just an idea.
 
Okay, new plan. A telescoping rod that fits on the end of my wrench and has sections about .07 inches long (measured from center of bolt). For every pound of torque I need, I'll pull out a section. So if I need 7 pounds of torque, I pull out seven sections, it takes me to (0.07*7) 0.49 inches. THEN I stand on the end of it, so my center of gravity is at the edge. So the force applied would be 168 pounds, 0.49 inches away from the center of the bolt. So the force moment would be (168lbs * 0.49in * 1/12 ft/in) 6.86 footpounds. This is pretty close, and if I need that extra push, I'll bounce a bit on my toes, or wear my work boots for added weight.

This will be known as the 'Telescoping Daniels Wrench**'. Of course it's weight specific, so if there isn't a model fit for you yet, buy the next size up and either wear some ankle weights, or have a friend stand on it with you.

**Patent pending
 
Found a cheap torque wrench today, so the 'Telescoping Daniels Wrench' will have to be put on hold. If you reserved one you'll be getting your money back, and you'll be the first to hear about them when they go into production!
 
I completely agree with you, Philip. My professors would tear me up if I used the wrong unit notation. Keep in mind everyone, in/lb is read inches per pound. Like mi/h is miles per hour.

Proper units lead to accurate dimension analysis, and much less confusion. It bothers me as much as poor grammar.