Brake Systems - DELCO-Moraine Single Piston Disc - Front: Overhaul: Reassembly

Lubricate bore in caliper and new piston seal with clean brake fluid. Position seal in caliper bore groove. Lubricate piston with clean brake fluid. Assemble new boot into groove in piston with fold facing open end of piston.
Insert piston into caliper bore using care not to unseat seal. Do not force piston to bottom of bore. Position outer diameter of boot in caliper counterbore. Seat boot using suitable tool (J-26267 on Starfire and Skyhawk or J-22904 on all other models).

Check boot installation to make sure retaining ring moulded into boot is not bent and that boot is installed completely below caliper face. Install brake hose, using a new copper gasket.

NOTE: After caliper has been overhauled and installed, it must be bled.

TIGHTENING SPECIFICATIONS

Application

Ft. Lbs.

Brake Hose-to-Caliper

Buick & Chevrolet

Cadillac

⁽¹⁾30

Oldsmobile

Omega & Starfire

Cutlass, 88 & 98

Toronado

Pontiac

Caliper-to-Mounting Bracket

Buick, Chevrolet & Pontiac

Cadillac

Oldsmobile

Wheel Attaching Bolts

Buick

Century, Regal, Skylark & Skyhawk

All Others

Cadillac

100

Chevrolet

Oldsmobile

Cutlass, Omega & Starfire

88 & 98

100

Toronado

130

Pontiac

Bonneville & Catalina

All Others

⁽¹⁾	Maximum torque value.

DISC BRAKE ROTOR SPECIFICATIONS

Application

Disc Diameter

Lateral Runout

Parallelism

Original Thickness

Minimum Refinish Thickness

Discard Thickness

Buick

Skyhawk

9.88"

.005"

.0005"

.880"

.830"

.815"

Skylark, Century, Regal

11.00"

.004"⁽¹⁾

.0005"

1.040"

.980"

.965"

All Others

11.86"

.005"

.0005"

1.290"

1.230"

1.215"

Cadillac

Limousine & Commercial

Chassis

12.00"

.005"

.0005"

1.285"

1.220"

1.215"

Eldorado

11.00"

.008"

.0005"

1.205"

1.195"

1.170"

All Others

11.81"

.005"

.0005"

1.037"

.980"

.965"

Chevrolet

Monza

9.74"

.004"

.0005"

.880"

.830"

.815"

Vega

9.88"

.005"

.0005"

.500"

.455"

.440"

Chevelle, Nova, Camaro

11.00"

.005"

.0005"

1.035"

.980"

.965"

All Others

11.86"

.005"

.0005"

1.280"

1.230"

1.215"

Oldsmobile

Starfire

9.88"

.005"

.0005"

.880"

.850"

.815"

88, 98

11.88"

.005"

.0005"

1.290"

1.230"

1.215"

Toronado

11.00"

.002"

.0005"

1.245"

1.185"

1.170"

All Others

11.00"

.004"

.0005"

1.040"

.980"

.965"

Pontiac

Astre

9.88"

.004"

.0007"

.500"

.455"

.440"

Sunbird

9.74"

.004"

.0007"

.880"

.830"

.815"

Ventura, Firebird

11.00"

.004"

.0007"

1.030"

.965"

.950"

LeMans, Grand Prix

11.00"

.004"

.0007"

1.00"

.965"

.950"

All Others

11.86"

.004"

.0007"

1.250"

1.215"

1.200"

⁽¹⁾	Skylark has lateral runout of.005"