This Haynes do-it-yourself repair and service manual, covers 1990-1993 Acura Integra and 1991-1995 Acura Legend automobiles.
Book Excerpt: Acura Integra 1990-1993, Acura Legend 1991-1995 Repair Manual BRAKES

MASTER CYLINDER | REMOVAL AND INSTALLATION NOTE: If the master cylinder is defective, it must be replaced with a new one - the manufacturer does not recommend rebuilding it. REMOVAL (Refer to illustration 6.4)

1. The master cylinder is located in the engine compartment, mounted to the power brake booster.
2. Remove as much fluid as you can from the reservoir with a syringe, such as an old poultry baster. Warning: If a baster is used, never again use it for the preparation of food.
3. Place rags under the fluid fittings and prepare caps or plastic bags to cover the ends of the lines once they are disconnected. CAUTION! Brake fluid will damage paint. Cover all painted surfaces and be careful not to spill fluid during this procedure.
4. Loosen the fittings at the ends of the brake lines where they enter the master cylinder (see illustration). To prevent rounding off the corners on these nuts, the use of a flare nut wrench, which wraps around the nut, is preferred. Pull the brake lines slightly away from the master cylinder and plug the ends to prevent contamination.
5. Remove the strut brace from the engine compartment (if equipped).
6. Disconnect the electrical connector at the brake fluid level switch on the master cylinder, and then remove the nuts attaching the master cylinder to the power booster (see illustration 6.4). Pull the master cylinder off the studs and out of the engine compartment. Again, be careful not to spill the fluid as this is done.
INSTALLATION (Refer to illustration 6.8)
7. Bench bleed the new master cylinder before installing it. Because it will be necessary to apply pressure to the master cylinder piston and, at the same time, control flow from the brake line outlets, it is recommended that the master cylinder be mounted in a vise, with the jaws of the vise clamping on the mounting flange.
8. Attach a pair of master cylinder bleeder tubes to the outlet ports of the master cylinder (see illustration).
9. Fill the reservoir with brake fluid of the recommended type (see Chapter 1).
10. Slowly push the pistons into the master cylinder (a large Phillips screwdriver can be used for this) - air will be expelled from the pressure chambers and into the reservoir. Because the tubes are submerged in fluid, air can't be drawn back into the master cylinder when you release the pistons.
11. Repeat the procedure until no more air bubbles are present.
12. Remove the bleed tubes, one at a time, and install plugs in the open ports to prevent fluid leakage and air from entering. Install the reservoir cover.

LEGEND ENGINE

VALVE COVERS | REMOVAL AND INSTALLATION INSTALLATION

10. The mating surfaces of each cylinder head and valve cover must be perfectly clean when the covers are installed. Use a gasket scraper to remove all traces of sealant and old gasket material, and then clean the mating surfaces with lacquer thinner or acetone. If there's sealant or oil on the mating surfaces when the cover is installed, oil leaks may develop.
11. If necessary, clean the mounting bolt and nut threads with a die to remove any corrosion and restore damaged threads. Make sure the threaded holes in the head are clean - run a tap into them to remove corrosion and restore damaged threads.
12. The gaskets should be mated to the covers before the covers are installed. Apply a bead of RTV sealant to the front and rear camshaft towers where the corners of the gasket contact them, and then position the gasket firmly inside the groove around the cover.
13. Install the round seal on top of each spark plug well.
14. Carefully position the cover on the head and install the bolts.
15. Tighten the bolts and nuts in three or four steps to the torque listed in this Chapter's Specifications.

Subject: 1990, 1991, 1992, 1993, 1994, 1995 Acura Integra, Acura Legend service, maintenance, repair. ISBN-10: 1563923351 | ISBN-13: 9781563923357 | Haynes 12021