Wilwood W4A Big Brake Rear Brake Kit For OE Parking Brake - Manual (Page 5)

• Lubricate the caliper mounting studs (10) with lightweight oil.
Initially place two .030” thick shims (11) on each stud between
the caliper and the bracket, as shown in Figure 1 and Photo 3.
With the bleed screws pointing up, mount the caliper (7) onto the
bracket (1) using lock nuts (8) and washers (9), Figure 1 and
Photo 4. Temporarily tighten the lock nuts and view the rotor
through the top opening of the caliper. The rotor should be
centered in the caliper, Photo 5. If not, adjust by adding or
subtracting shims (2) between the bracket and the upright.
Always use the same amount of shims on each of the two
mounting bolts. Once the caliper alignment is correct, remove
the bracket mounting bolts one at a time, apply red Loctite
® 271
to the threads, and torque to 65 ft-lb.
• Remove the two pad retaining pins from the caliper (7) by
carefully popping out the pin retaining clips and sliding out the
pins. Insert the brake pads (12) into the caliper, with the friction
material facing the rotor, as shown in Photo 6. Check that the
top of the brake pad is flush with the outside diameter of the
rotor, Photo 7. If not, adjust by adding or subtracting shims (11)
between the caliper and the bracket. After the caliper pad height
is set, secure the brake pads in place with the pad retaining pins
and clips. Torque the caliper lock nuts (8) to 47 ft-lb.
• Temporarily install the wheel and torque the lug nuts to the
manufacturer’s specification. Ensure that the wheel rotates
freely without any interference.
•NOTE: OEM rubber brake hoses generally cannot be adapted to Wilwood calipers. The caliper inlet
fitting is a 1/8-27 NPT. The preferred method is to use steel adapter fittings at the caliper, either straight,
45 or 90 degree and enough steel braided line to allow for full suspension travel. Wilwood offers a
brake flex line hose kit to fit this application, order P/N 220-11383 for the Camaro, or P/N 220-13001
for the Cadillac. Hose kit includes hoses, fittings, etc., all in one package for this application. Carefully
route hoses to prevent contact with moving suspension, brake or wheel components. NOTE:
Wilwood hose kits are designed for use in many different vehicle applications and it is the installer's
responsibility to properly route and ensure adequate clearance and retention for brake hose
components.
•NOTE: Specified brake hose kits may not work with all Years, Makes and Models of vehicle that this
brake kit is applicable to, due to possible OEM manufacturing changes during a production vehicle's
life. It is the installer's responsibility to ensure that all fittings and hoses are the correct size and
length, to ensure proper sealing and that they will not be subject to crimping, strain and abrasion
from vibration or interference with suspension components, brake rotor or wheel.
•The OEM brake line bracket must be modified to remove the flat, Photo 8, making the hole round to accommodate the new bulkhead
fitting.
•In absence of specific instructions for brake line routing, the installer must use his best professional judgment on correct routing and
retention of lines to ensure safe operation. Test vehicle brake system per the 'minimum test' procedure stated within this document
before driving. After road testing, inspect for leaks and interference. Initially after install and testing, perform frequent checks of the
vehicle brake system and lines before driving, to confirm that there is no undue wear or interference not apparent from the initial test.
Afterwards, perform periodic inspections for function, leaks and wear in a interval relative to the usage of vehicle.
• Bleed the brake system, referring to the additional information and recommendations on page 7 for proper bleeding instructions. Check
system for leaks after bleeding.
Page 5
Assembly Instructions (Continued)
Photo 4 Photo 5
Photo 6 Photo 7
Photo 8