Proper torqueing technique?
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Tuned
Joined: Mar 2001
Posts: 383
Likes: 6
From: California
Proper torqueing technique?
Hi, I have a question about torqueing heads down. I am under the impression that using an extension changes the torque properties of the wrench. Is this correct and if so what tool or calculation is best used for the heads and the rest of the 302 engine. Please help I'd like to get started tommorow. Thanks. :7
More Turbo
Joined: May 2000
Posts: 655
Likes: 0
Proper torqueing technique?
Cold, use no oil. Make sure all your gaskets and surfaces are CLEAN!!! Torque to about 1/2 value first in order then proceed to 3/4 value in order then to full value in order. Then re-check each bolt in order. An socket extension is okay but don't use an extension for leverage. Use a quality torque wrench and not one that has been used for other things because of it's size. When in doubt check all the bolts for a third time in order.
Bob
Bob
Senior User
Joined: Apr 2002
Posts: 406
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From: cedar rapids usa
Proper torqueing technique?
The only thing I would add to the above post is that you are sure to start in the center of the head with the top bolt. Being sure to work your way out in a box X pattern. Do not stop until you have all the bolts done. In other words don't drink a 6 pack or stop for a sexual encounter with the cute UPS driver until you have the head completely torqued down.
Posting Guru
Joined: Jun 1999
Posts: 2,007
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From: Oregon
Proper torqueing technique?
Use the extention for your initial torque sequences. After the final, take the extention and check things again with just a socket, (or just use a deep well socket in the first place.) The longer the extention the more your actual value will be off.
Elder User
Joined: Oct 2001
Posts: 974
Likes: 0
Proper torqueing technique?
Yep, the extension can twist (although not much), and can "fool" the torque wrench in thinking it reached the proper torque. I recommend taking Howdy's advice and use the extension on the 1/2 value, and maybe even the 3/4 value, but not for the final value.
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May 17, 2011 08:51 AM
