This is a way of marking territory if they are rubbing the sides of their faces on the object. Cats have scent glands around their lips and on their chins. The facial pheromones that they mark with are signals of a happy or calm cat to other cats.
The part that simultaneously enables the axle to flex while transmitting the driving force is called a drive axle joint, and is also known as a constant velocity (or CV) joint. The CV Boot is a ribbed, rubber flexible boot that keeps water and dirt out of the joint and the special grease inside the joint.
Quick Answer. Antifreeze leaking from a car is an indication that one of the components of the car's cooling system is damaged or worn. Common problems include cracked and split radiator hoses, faulty hose ends and hose clamps, and leaks in reservoirs and radiators.