FordExcursions.com Forums
E. Long
 
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• Subscriber since 1/1/2001 |
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• Atlanta, GA, USA |
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• Registered on 1/23/2001 |
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• 2,229 posts |
• 1 Vehicle
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 Posted:5/29/2003 06:49 |
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| Quote: | Explain the torque vs impact wrench problem. By torqueing within a set range you insure the rim is pulled up straight and even? Impact wrench may have it off center? I just had cross drilled and slotted rotors along with high performance pads put on my wife's Pathfinder(because of pre-mature rotor warpage). I know these were impact wrench tightened, also. Take me to school guys.  |
An impact wrench could be torquing the lug nuts too tight or not tight enough. It is also not precise, either. It's not a matter of the wheel being off-center but rather having the stresses on the wheel/rotor being distributed unevenly when braking. If you think about it, uneven torquing of the lug nuts will force the brake pads to rub against the rotors unevenly. The uneven rubbing of the pads on the rotor will cause excess heat in one area of the rotor and cause the rotor warpage because the heat isn't evenly dispersed throughout. You don't feel this immediately because it takes several thousand miles to accomplish this.
This never used to be a problem on past Ford trucks. These rotors must be a little thinner (or something) because you never had to be this precise when tightening lug nuts. The cryogenically frozen rotors will put up to this type of abuse for a longer period of time because they are hardened, but they are not invincible.
-Eric
'67 Galaxie 500 - 390 FE, .030" over, FE to AOD adapter, disc brake conversion. The Daily Driver.
'00 Excursion - 7.3L PSD, LANDYOT Gen-II Radius Rods, Factory Tech Valve Body, 200K+ miles and going |
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Wheels
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• Visalia, CA, USA |
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• Registered on 1/20/2003 |
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• 214 posts |
• 1 Vehicle
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Posted:5/29/2003 10:58 |
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I always have my tire guys torque them not air gun them. For this particular reason. If you check the nuts that are airgunned, some will be on there like nobodies business and others...not so much. unequal pulling strength on the lugs = premature warpage. |
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203008581
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• MONTGOMERY, AL, USA |
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• Registered on 11/22/2002 |
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• 73 posts |
• 1 Vehicle
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Posted:5/29/2003 19:03 |
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Thanks guys. Had never heard of this until now. Time to get out the torque wrench. |
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steve holtyn
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• seattle, WA, USA |
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• Registered on 3/21/2003 |
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• 29 posts |
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Posted:6/2/2003 14:40 |
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If the reccomended torque is 150to165 lbs on the lug nuts if I go and get my tires rotated and tell the tire guys this reccomendation from ford, how can i test to see if they really did tighten them to spec is there a correct tool for this?  thank you for all the info guys its very good to know! |
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E. Long
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• Subscriber since 1/1/2001 |
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• Atlanta, GA, USA |
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• Registered on 1/23/2001 |
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• 2,229 posts |
• 1 Vehicle
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Posted:6/2/2003 21:38 |
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| Quote: | | If the reccomended torque is 150to165 lbs on the lug nuts if I go and get my tires rotated and tell the tire guys this reccomendation from ford, how can i test to see if they really did tighten them to spec is there a correct tool for this? thank you for all the info guys its very good to know! |
Steve,
You need a torque wrench. You can pick one up at an auto parts store or Sears for about $50, I believe. They have a dial on them that allows you to select the torque rating. When you tighten bolts/lugs, the torque wrench will click when it reaches the proper torque rating. The clicking will also prevent you from over-torquing the lug nuts.
Check out the torque wrenches that Sears has:
http://www.sears.com/sr/mercado/searchall.jsp?keyword=torque+wrench&BV_SessionID=@@@@0608684270.1054608799@@@@&BV_EngineID=ccfeadcihimdddlcehgcemgdffmdflh.0&bidsite=CRAFT&targetPage=%2Fmercado%2Fsearchall.jsp&vertical=SEARS
The ones that are in the $50 range are what you'd want.
-Eric
'67 Galaxie 500 - 390 FE, .030" over, FE to AOD adapter, disc brake conversion. The Daily Driver.
'00 Excursion - 7.3L PSD, LANDYOT Gen-II Radius Rods, Factory Tech Valve Body, 200K+ miles and going |
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Wheels
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• Visalia, CA, USA |
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• Registered on 1/20/2003 |
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• 214 posts |
• 1 Vehicle
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Posted:6/3/2003 09:29 |
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I don't know if you have a Harbor Freight in your neck of the woods. But I got my torque wrench there for $19. I'm sure it's not the greatest(does have a lifetime guarantee), but for what I use it for (Tires mostly) at least I know all of the nuts are the same. |
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