Belt dressing, or belt conditioner, is a spray for the rubber belts that are used in cars, trucks, lawn mowers, and tractors. Spraying belt dressing on a belt softens the rubber and keeps it from drying out and slipping. You can use it on lawn mower drive and deck belts, tiller, tractor, and automotive belts to keep them limber and prolong their life. It can also prevent and stop squeaks caused by a slipping belt.
Should I use belt dressing on my serpentine belt?
Yes. You should apply it to the grooved side of the belt every 3,000 miles or with every oil change. Doing this will help prolong the life of your belt and prevent any belt slip problems.
If my belt is already squeaking, will belt dressing stop it?
Sometimes, depending on the cause of the squeak. Belt dressing is intended as a tool to help you maintain your belts. It’s not an easy fix for all squeaks. If your belt is slipping because the rubber is starting to dry out, then belt conditioner will stop the squeak by softening it and moisturizing it. If your belt is getting dried out, spray both sides with belt dressing and let it soak into the belt before spraying it again. Once you put the belt back on, the squeak will seem louder than before, but will start to go away as you drive the vehicle.
However, there are a lot more causes of squeaking belts than just dryness. Applying belt dressing is the first fix you should try if you have a squeaky belt. It may work at first, but if the squeak comes back, your tensioner pulleys could be misaligned or one of the pulley bearings could be worn out. Belt dressing will not fix the squeak in these cases. To check your pulley bearings, you’ll have to remove the serpentine belt and turn each pulley by hand. All of the pulleys should all spin freely. If you feel resistance in one of them, it has a bad bearing and you should replace it. If all of the pulleys spin easily, or if you replace a sticky pulley and the squeak is still there, you most likely have misaligned pulleys. You should take your car or truck to a professional service technician to have your pulleys checked if this is the case.