OEM 2003 Chevrolet Monte Carlo Brake Disc

2003 Chevrolet Monte Carlo Brake Disc Parts Questions & Experts Answers

• Q: How can the assembled lateral runout (LRO) of the front brake disc be corrected on 2003 Chevrolet Monte Carlo?

  A: To fix the assembled lateral runout (LRO) of the brake rotor, it is necessary to examine the thickness variation of the brake rotor initially because exceeding the maximum allowed variation may cause brake pulsation. Start by lowering the conical brake rotor washers (J45101-100) and the lug nuts that were put in during the assembled lro measurement. I will examine the mating surface of the hub/axle flange and the brake rotor for presence of any foreign particles or debris. Then, re-index the brake rotor in a different orientation compared to the hub/axle flange. Hold the rotor firmly against the hub/axle flange and install one conical brake rotor washer(J45101-100) and one lug nut on the upper-most wheel stud and snug the lug nut securely by hand. Keep on holding the rotor as you install the rest of the conical brake rotor washers (J45101-100) and lug nuts onto the wheel studs in a star-pattern and fasten them securely by hand to prevent loosening at highways speeds. Employ the help of the torque-limiting socket set (J39544-KIT) to properly tighten the lug nuts in a star-pattern at specification to confidently position the rotor. Compare the assembled lro of the brake rotor to the original. In case the measurements are within specifications, then install the brake caliper and press the brake pedal several times to lock the rotor then remove the conical brake rotor washers (J45101-100) and lug nuts. If the measurement is over spec repeat the indexing and measurement process repeatedly till the best result for the assembled lro measurement is gotten and mark the final rotor location on the wheel studs if the direction is unlike the original. If the assembled lro is determined to be still higher than the maximum allowable specification, additional correction may be required.