As the saying goes, when people gather firewood, the flame burns high, but in some things, this rule cannot be followed. When the car we are driving has a tire blowout or other issues that require lifting the car for maintenance, using a jack to lift the car is sufficient. If the number is 2 or more, it may have serious consequences.

From a common sense perspective, using two jacks to lift the roof diagonally, even if the pivot points are selected correctly, the other two unsupported pivot points may tilt, increasing the risk of vehicle overturning. If four jacks are used to lift, it may seem to increase the stability of the vehicle, but it requires arranging four people to press the handle at the same time to ensure that the lifting height of the lifting sleeve is consistent in order to improve the safety factor of the lifting operation. If only one person keeps lifting four jacks, there is still a possibility of vehicle overturning.

Therefore, when repairing cars, we try to use a jack to lift the vehicle as much as possible, and only press the handle to start the lifting operation on the basis of ensuring that the ground is hard and flat.