LeSabre V6-181 3.0L (1986)
bushings.
(Caliper to bracket stop clearance should be checked with calipers in position and the mounting bolts torqued to specification. Clearance,
measured at the two locations shown in Figure 2, should be within specifications for the vehicle tested. If clearance is too great, the caliper may
move and cause a clunking noise when brakes are applied. If there is not enough clearance, the caliper may drag on the knuckle. Caliper bracket
stops can be filed to adjust clearance.)
When servicing calipers, caliper mounting bolts should be cleaned and inspected for rust corrosion. Always replace corroded mounting bolts; do
not attempt to polish away corrosion. To prevent binding, the mounting bolt sleeve bushings should be coated with silicone lubricant, Part
Number 1052863 or equivalent. Refer to Figure 3. A light application of silicone lubricant should also be applied to the caliper bracket stops.
1989 cars are equipped with a new caliper mounting bolt and sleeve bushing assembly that reduces the possibility of binding. New parts are
available for service of past model front wheel drive cars as follows:
Carline
Part Number
C-H-A/Hvy
18016163
J-N-L-A/Light
18016164
Parts are currently available from GMSPO.
3.
Abrasive Lining Material
For uneven rotor wear to occur, shoe lining material must be abrasive enough to cause wear while rubbing against rotor highspots. Some types of
brake lining material are more abrasive than others. The more abrasive the material, the more quickly wear will occur when rotor high spots
contact the lining.
Product engineering selects the type of brake lining material to be used based on the friction coefficient requirements of a particular vehicle.
Brake linings and other components should be replaced only with the parts recommended in the parts catalog or the latest service bulletin.
