Question: Can You Over Tighten Wheel Nuts?

Should you grease wheel nuts?

The owners manual says: clean threads and no lube (in many cases).

I say: definitely use lubricant on wheel nuts (actually on the studs).

The lube increases the stretch of the thread for any given amount of applied torque..

How do you know how much torque?

Car manufacturers specify a proper tightening level, a torque value expressed in foot-pounds, that can usually be found in your vehicle’s owner’s manual. Torque is a rotational force applied around a point or, in this case, a nut. Put a 1-foot-long wrench on a nut and apply 10 pounds of force to the opposite end.

Do you really need a torque wrench for wheels?

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.

Can you over tighten lug nuts by hand?

The problem with impact guns is they’re so powerful, one can easily over-tighten the nuts. A torque wrench measures the tightening force applied, allowing the user to accurately follow the manufacturer’s recommendations. If your lug nuts were tightened by hand I wouldn’t be too concerned.

Can wheel nuts come loose?

One of the most frequent reasons lug nuts are loose is because they were over-tightened with an air impact wrench. Over tightening stretches the studs, reducing (not increasing) clamping force. That lets nuts back off. Final tightening should always be done with a torque wrench by hand.

How much torque does it take to break a bolt?

If you add 33% to the torque figure listed, that should tell you the torque required to snap it. For example, if it takes 75 ft/lbs to torque to 75% yield, add 33% (25 ft/lbs) to get to the 100% yield (breakage) figure.

How tight should I tighten my wheel nuts?

Push the wheel home on the hub and using your socket wrench, tighten the wheel nuts just enough to hold the wheel snugly. Work in a criss cross pattern, tightening the nut that is almost directly opposite from the nut that you just tightened.

How much torque does it take to tighten a tire?

And when you look at that, and realize that the average torque required on a lug nut, to hold the wheel on, is 80 to 90 ft-lbs, well you can imagine how over-tightened some of these lug nuts are.

Do screws loosen over time?

Over time, the threads can deform inelastically, reducing the amount of normal force available to create friction between the screw and the hole. As a result, it becomes easier for vibrations to rotate the screw. … This is why screws will often loosen over time to a point and then stop.

How much torque is too much?

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.

Is it bad to use a torque wrench to loosen?

So long as users operate with caution and do not exceed the maximum torque, most torque wrenches can be used for undoing. … By exceeding the maximum torque limit during a bolt loosening you can affect the wrench accuracy, causing problems for future use. If in any doubt, use another tool for loosening bolts.

Why do my wheel nuts keep coming loose?

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 …

What causes wheel nuts to come loose?

Where fasteners are to blame, several factors can cause nuts to work loose. Excess paint, rust, scale or dirt between mating areas of wheel end components will lead to low clamping force. … Fractured or worn out nuts with deformed threads have also been linked to loss of sufficient clamping force at the nut flange.

What happens if you over torque a nut?

Everyone who has ever worked with fasteners has accidentally messed one up at some point. One of the most damaging ways to do that is by over-tightening, or over torquing the fastener. This can result in stripping screws, snapping screw heads and damaging pre-tapped threading.

Do you have to jack up your car to tighten lug nuts?

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.