Torque Wrench

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A quick video that explains what torque is and why its important to use a torque wrench when working on your vehicle. Demonstrated in this video is the clicker style which are very accurate and reliable. When replacing parts that seal with a gasket it is a must that the bolts be tightened to the correct torque specified by the manufacturer. A good example of this are your cars head bolts. They must be tightened in a special pattern 3 seperate times, increasing the amount of torque as you go. So with the 2.2L sohc honda motor you would follow the tightening sequence (found in the service manual) and tighten the bolts to 22ft lbs. Then follow the sequence and tighten them all to 51 ft lbs, finally follow the sequence again and bring them to their final torque which is 78ft lbs. You cannot just initally tighten head bolts to their maximum specified torque. The gasket between the block and the head will eventually start leaking. Some people don't always use torque wrenchs when tightening single bolts. They claim they can tighten it by "feel". More often than not these are the people that snap bolts and wind up needing to use a Tap & Die set to fix a big mess (see my other videos). Following the manufactures specified torque will save you a lot of headaches. Be sure never to use your torque wrench to loosen bolts, you only want to use it to apply torque. These wrenches need to be be recalibrated every 6-8 months or depending on use. Do not attempt to recalibrate yourself !

Also there are times when torque is measured in degrees. Occasionally you will see specs that call for 28ft lbs and an additional 90 degrees. For situations like this a special attachment must be used called a torque degree gauge. This can be used on a regular socket wrench, it does not have to be attached to a torque wrench. Torque wrenchs will only measure ft lbs and in lbs.

Category:

Howto & Style

Tags:

• torque wrench
• torque
• rachet
• socket
• extension
• calibration
• tension
• tools
• craftsman
• snap on
• harbor freight
• mac
• garage
• auto
• rebuild
• repair
• engine
• block
• cylinder head
• force
• lug nuts
• bolt
• nut fastener
• 3/8
• 1/2
• foot pounds
• inch pounds
• degrees
• head bolts
• tightening sequence
• recalibrate
• warranty
• rotational axis

[ncrdisabled]

I do not know if you know this or not but at least 70 percent of all craftsman tools are made in china . I went to sears to replace some of my bad sockets and a broke torque wrench I had bought in the 90s I looked at them and they are all made in China . I was going to buy Ace hardware tools made in Ohio but now there made in China too . Maybe Snap on?

[NJprepper321]

@ncrdisabled Snap on, Mac and Precision Instruments are definatley the best brands as far as torque wrenchs go but can run upward of 500 bucks. For the home mechanic like myself thats way too pricey, personally i just dont use the tool enough for that kind of investment.

[NJprepper321]

@ncrdisabled I've never had a problem with the craftsman brand, but thats just me. This video is just to demonstrate how to operate a clicker style regardless of the brand. People who buy a $500 torque wrench usually know how to operate it and dont have to watch videos like this. In my opinion craftsman is a good brand but definatley not the top of the line. But be realistic its 2012 whats not made in china now a days?

[ncrdisabled]

@NJprepper321 Not much and that is sad.