It will be fine if your drum is shorter than that.įor example, setting it to the 10-inch mark for a drum with a length of 10.5 inches shall be merely a picnic, but not vice versa. The next vital tool you must have is the micrometer, with a length of no less than 15 inches. Remember to check the condition of the drum’s center for any indications of brake drum cracks or grooves.Īfter that, make a visual inspection on the region where the rim encounters inside.ĭoing so will help you make sure there are no chips or flakes that might fly off and possibly damage micrometer anvils in the system. This measuring procedure of your drum’s internal diameter will first need you to position it on a flat surface with the inside diameter pointing up. You’re halfway there, with only a few steps to go! Now, it’s time to keep track of any permitted run-out (to gauge excessive wear) and carefully compare measurements to other automobile makes and models. In addition to drums in the system, sensors are also another essential component used by the majority of manufacturers.Ĭheck up on the brake drum thickness chart that lists the brake drum specification guide and maximum diameter for disc-brake assemblies employed in cars from the identical manufacturer, or have a look at a table that contains information on this sensor or its replacement.ĭo whichever way you wish to, as long as you do not neglect this step, and you’ll be on your way to getting the task completed! It will be important to look over the rotor and record the largest possible size or diameter if your car features a drum braking system. Certain drums might need to get removed with the aid of a drum puller. Now, to remove the drum, turn the bolt in a counterclockwise direction and pull it off. You may also need to prepare a wrench or other tool occasionally just to be in case so you can locate the bolt retaining the drum.

Then, depress the retention clip using a little screwdriver and a small-sized spoon to take off the star adjuster from the brake shoes. How to measure a brake drum? Let first commence the process by removing the whole drum brake assembly from the wheel.īy the time you do so, don’t forget to clean out any grit or dirt that has developed on the brake shoes and drums as well.

99 e350 drum brake size chart