K 2500 Truck 4WD V6-262 4.3L (1988)
Brake Rotor/Disc: Customer Interest
Suspension - Lower Control Arm May Contact Brake Rotor
Number:
88-23
Section:
3C
Date:
June, 1987
Subject LOWER CONTROL ARM MAY CONTACT BRAKE ROTOR
Model and Year 1988 C-1, 2
Some 1988 C-1, 2 model trucks may experience a condition where the brake rotor comes in contact with the lower control arm. This occurs only when
the steering wheel is turned to the full lock position and most often on left hand turns. The interference between the lower control arm and brake rotor
will cause a screeching noise as metal rubs metal. A gouge on the inner brake rotor is evidence that an interference condition does exist. On vehicles with
this condition, the nose area of the lower control arm should be ground away to provide additional clearance. If a gouge is found on the inside of the
brake rotor, then replacement of the rotor will be necessary.
SERVICE PROCEDURE:
1.
Inspect brake rotor for signs of contact with the lower control arm.
2.
If a gouge is found, replacement of the brake rotor will be necessary.
3.
Siphon 2/3 of the brake fluid from the master cylinder.
4.
Remove the wheel and tire assembly.
5.
Remove the brake caliper from the brake rotor. Suspend the caliper assembly with a wire hook away from the work area.
6.
Remove wheel bearing cap and nut from the spindle.
7.
Remove the brake rotor and discard if a gouge is found. Care should be used so that the outer bearing and spindle threads are not damaged. Save
the bearings.
8.
Remove the brake splash shield and gasket.
FIGURE NO. 1
9.
Mark the center nose portion of the lower control arm. Place another mark 2 inches on either side of center (Figure No. 1).
10.
Using a die grinder or equivalent, remove approximately 2 mm (.08 inches) of metal from the control arm nose to obtain clearance between the
