torque wrench needle
Question on understanding torque?
So im going to replace my water pump and im reading the repair guide and it says to tighten bolts to 15-22 ft. lbs. (20-30 Nm). so my questions are is it 15-22 pounds of torque? cause that doesnt seem to be that much. and if so why does it say ft and lbs? and im not planing on using a torque wrench very much so i was going to buy this cheap one (see link 1). will it do the job good? or the one in link 2. more expensive but seems worth it.
http://www.amazon.com/Neiko-Classic-Needle-Style-8-Inch-2-Inch/dp/B0019VMI0Y/ref=pd_cp_hi_3
http://www.amazon.com/gp/product/B0031QPJZG/ref=cm_rdp_product
Agree with Bob about a quality Torque wrench being required for doing critical items....
Autozone, etc auto parts will loan you a decent quality Torque wrench for free when you use it on parts purchased there. Along with those big names....sears, cornwell even a good one from Home Depot would be better then not using one at all.
15 Ft-Lbs of torque would be the same as hanging a 15lb weight on the end of a 1 ft long bar (thus why it is called Foot-pounds -of rotational force-)
22 Ft-lbs would be 22 lbs on a 1 ft long bar. (or 11 pounds on a 2 foot long bar).
Although not CRITICAL on a water pump it still has a gasket and either over or under torque is bad for a gasket.
A look at what is currently available on eBay
 Neiko 1/2" and 3/8" Drive Needle Torque Wrench US $17.90 
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 150 LBS POUNDS NEEDLE TORQUE BEAM WRENCH TORK TOOL US $24.99
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 2 NEW 3/8" & 1/2" Inch NEEDLE TORQUE WRENCH 150 Foot Pounds Lbs US $30.99
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 1/2" 3/8" Simple Needle Gauge Torque Wrench 150 ft-lbs US $10.99
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 Brand New 1/2" Needle Torque Wrench US $23.75
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 MHH Torque Meter 1/4" drive TORQUE WRENCH 0-120 LB-INS with Marking needle US $74.33
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 3/8" AND 1/2" DR NEEDLE FOOT POUND READING TORQUE BEAM WRENCH TORQ TOOL US $24.99
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