Impreza WRX STI F4-2.5L DOHC Turbo (2007)
2. Remove the piston boots from each piston end.
3. Place a wooden block in caliper body as shown in the figure to prevent the piston from jumping out and avoid being damaged.
4. Gradually supply compressed air via the installation hole of brake hose to force the piston out.
5. Remove the piston seal from caliper body cylinder.
CAUTION: Do not damage the cylinder and piston seal groove.
ASSEMBLY
1. 15 INCH TYPE
1. Clean the caliper body interior using brake fluid.
2. Apply a coat of brake fluid to the piston seal and fit piston seal in groove on caliper body.
3. Apply a coat of brake fluid to the entire inner surface of cylinder and outer surface of piston.
4. Apply a coat of specified grease to the boot and install the piston boot to the groove on ends of cylinder.
Grease: NIGLUBE RX-2 (Part No. K0779GA 102)
5. Insert the piston into cylinder.
CAUTION: Do not force the piston into cylinder.
