S10/T10 Blazer 4WD V6-4.3L VIN W (1997)
Brake Master Cylinder: Vehicle Damage Warnings
CAUTION:
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Always use the correct fastener In the proper location. When you replace a fastener, use ONLY the exact part number for that application. General
Motors will call out those fasteners that require a replacement after removal. General Motors will also call out the fasteners that require thread
lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion Inhibitors)
on threaded fasteners or fastener Joint Interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may
damage the fastener. When you Install fasteners, use the correct tightening sequence and specifications. Following these Instructions can help you
avoid damage to parts and systems.
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Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers and fender covers to prevent brake fluid
from contacting these areas. Always reseal and wipe off brake fluid containers immediately after use to prevent spills.Use Delco Supreme 11
Brake Fluid GM P/N 1052535 or an equivalent DOT-3 motor vehicle brake fluid. Brake fluid should always be stored in a closed, sealed
container. Never use previously opened containers of stored brake fluid. Always use new fluid from a sealed container. Brake fluid left in an open
or improperly sealed container will absorb moisture. This can lower the fluid's boiling point and result in system contamination, corrosion, or
deterioration of rubber components.
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Do not hone the master cylinder bore. When the brake master cylinder is overhauled, it is recommended that the cylinder body be replaced rather
than "cleaned up" by honing the bore. The master cylinder has a hard, highly polished "bearingized" surface, which is produced by diamond
boring followed by ball or roller burnishing under heavy pressure. Honing will destroy this hard smooth surface and cause rapid wear of the rubber
cups.
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Use approved solvents only when cleaning or flushing the master cylinder and related components. The use of these liquids as cleaning solvent
will damage the rubber parts in the system if they have any trace of mineral oil or other contaminants.
