|Hardware Bolt or Stud Size||Typical Torque Range in Ft/Lbs||Minimum Number of Turns of Hardware Engagement|
|14 x 1.25 mm||85 – 90||9|
|7/16 in.||70 – 80||9|
|1/2 in.||75 – 85||8|
|9/16 in.||135 – 145||8|
If the lug nuts on the wheels are not tightened properly, the lug nuts are likely loose. To test the tightness of the lug nuts, check the torque settings with a torque wrench. Place the torque wrench on the lug nut and then turn it clockwise to see how tight the lug nuts are. Tighten the lug nuts if they are too loose.
An impact gun uses compressed air and a hammering effect to quickly and noisily zip the lug nuts tight. The problem with impact guns is they’re so powerful, one can easily over-tighten the nuts. … If your lug nuts were tightened by hand I wouldn’t be too concerned.
Most automotive lug nuts are tightened to 90 – 120 ft. lbs., trucks will be more, about 120-150 ft.
Temperature. Most wheels today are made of an aluminum alloy and are held to the hub with steel lug nuts. These two different metals expand and contract at different temperatures which can cause them to loosen as they heat up and cool down. This can cause lug nuts to loosen even if they are torqued to factory standards …
A torque wrench is a tightening tool.
It is a very sensitive and precise tightening tool, and should never been used to loosen bolts.
While a torque wrench is not absolutely required, it’s a good idea. You need to ensure the wheel is evenly clamped onto the hub. This prevents the wheel from warping and causing other issues. Using the lug wrench which comes with the car will get you down the road.
It’s possible to damage the wheel, rotor, and hub assembly. The wheel can come off if over-torquing the nuts/bolts is done.
3 Answers. Nope, doing it with the wheels on the ground if fine, no need to lift the weight of the wheels. It’s easier that way because the wheels can’t turn while you are torquing the lugs.
Overtightened Lug Nuts and Brake Rotors
Over-torquing a wheel can result in a warped brake rotor and possible hub flange damage. Rotors get extremely hot and improper, and over-torquing a wheel can result in warpage as the rotor heats up and cools back down in service.
You shouldn’t need to use a breaker bar for tightining down the lug nuts as it’s long enough. … Yes, this is what a breaker bar is for; to give someone more leverage when loosening or tightening a bolt or nut. Although, I would not use a breaker bar to tighten lug nuts as it may cause damage.
The reason for this is that the wheel bolts can loosen over time, meaning the wheel is no longer seated as tightly as it should be. After all, car tyres are subjected to heavy stresses on the road. You can prevent this by tightening the wheel nuts using a torque wrench whenever necessary.
Storing your torque wrench
However, when storing a torque wrench for an extended period of time, users should always wind it down to the minimum scale setting and never to zero. A fully loaded torque wrench, left in storage for a long period, can cause a set in the spring, causing it to weaken over time.
When you’re tightening a bolt, one click is enough. Many users allow their wrenches to click more than once, but this means they’re applying added torque to the bolts. Use your tool in a smooth, steady fashion and let it click just once. Torque wrench square drives CAN be fitted with “crow’s foot” style fittings.
Is it OK to use an oversized torque wrench to break loose small tight bolts? Never ok. … This torque wrench may be preset to a torque value for small repetitive work, such as receptacle or switch terminations.
Engines that are running, tend to vibrate. … In the case of insufficient torque, it’s the stud or the bolt itself that suffers all the impact, causing it to shear. Alternatively, the engine’s vibrations can cause the bolt or nut to come undone, displacing the tensioner.
Too tight and something will break, it may be the thread on the bolt, or much worse the thread on in the hole. Bolts will also break, sometimes leaving a very hard to remove bit in your frame. Not tightenough and it will work loose, and then you know to do it a bit tighter next time.
If the lug nuts are too tight, they can cause severe problems such as stripping the fastener threads or stretching the wheel studs. They could also warp the brake drums, rotors, or hubs. With loose nuts, meanwhile, there’s a small risk that the wheel could come off while you’re on the road.
Most 2WD road cars – even with large grippy tires – can’t handle more than 400-500 lb/ft of torque. AWD cars can handle as much as 600 lb/ft without losing traction.
Over tightening can warp your rotors. You’re never supposed to use an impact gun to put lug nuts on because there’s no way to accurately control the torque that’s being applied. Mechanics do it is because it saves time.
Always tighten to spec w tires on the ground. The lugs may loosen when the tires are back on pavement even when torqued to spec when car’s jacked up. We drive on roads, not in the air.
The brake rotors withstand a lot of heat during the process of braking, and need to dissipate this heat quickly so that the brake pads will be able to be pressed down again. Because of this mass amount of heat, the surface of the brake rotors can become uneven over time, which is often referred to as warping.
Overtorquing the lugs will cause a vibration via rotor warping, but only during brake application, it will not cause a static vibration, unless the warp is so huge that braking would be dramatically effected.
Will warped rotors fix themselves? No, it’s not possible for brake rotors to unwarp themselves. Rotors rarely “warp.” If they actually did so, they you would notice vibration even when the brakes are not applied (think about it, the pads on either side scarely clearly the rotors but by a few thousandths).
150 ft-lbs will break a 3/8″ drive usually and about 300 ft-lbs will break a 1/2″ drive. These are on regular breaker bars that are partially hollow and have the little ball in the space of the head to hold the socket. A SOLID 1/2″ heat treated impact rated drive anvil will go up to about 1200 ft-lbs.
The purpose of the breaker bar is to break loose stubborn lug nuts or bolts. A ratchet is used to quickly remove or install fasteners that have good threads and are not stuck or otherwise damaged. … The purpose of the breaker bar is to break loose stubborn lug nuts or bolts.
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