Brake Lines - Complete Set

Complete replacement of all brake lines (hard lines) on a 2005 Dodge Viper, including front-to-rear main lines, junction block connections, and caliper feeds. This is a safety-critical procedure requiring complete system bleeding and verification.

Warnings

Tools required

Parts

• Complete brake line kit (front-to-rear main lines, junction to caliper lines) × 1 — Use OEM or DOT-approved stainless steel kit for 2005 Viper
• Brake line retaining clips × 1 — Replace all damaged clips during removal
• Brake fluid (DOT 4) × 2 — Use OEM specification
• Rubber brake line grommets (firewall and body pass-throughs) × 1 — Use OEM specification

Fluids

• DOT 4 brake fluid — 2 qt

Preparation

1. Park vehicle on level ground and place wheel chocks behind rear wheels
2. Ensure engine is cold before beginning work
3. Remove master cylinder reservoir cap and use turkey baster to remove as much old brake fluid as possible from reservoir to minimize spillage
4. Raise vehicle and support securely on four jack stands at manufacturer-specified lift points, ensuring adequate working clearance underneath
5. Place safety blocks under frame rails as secondary support
6. Remove all four wheels and set aside
7. Photograph existing brake line routing from multiple angles for reference during installation
8. Apply penetrating oil to all visible brake line fittings at master cylinder, ABS modulator, junction blocks, flexible hose connections, and calipers; allow 15-30 minutes soak time
9. Prepare catch pans and absorbent pads under all connection points

Procedure

1. 1

   Disconnect battery negative terminal
   Disconnect the negative battery terminal to prevent accidental ABS pump activation during line removal. Use a 10mm wrench to loosen terminal clamp. Secure cable away from battery post.
2. 2

   Remove front brake line connections at calipers
   At each front caliper, place a catch pan underneath. Use a properly-sized flare nut wrench to disconnect the hard brake line from the flexible brake hose connection (verify exact fitting size on the 2005 Viper before selecting the wrench to avoid rounding fittings). Immediately plug or cap open lines to prevent fluid loss and contamination. Note the routing of retaining clips securing lines to suspension components and remove clips.
3. 3

   Remove rear brake line connections at calipers
   At each rear caliper, place a catch pan underneath. Use a flare nut wrench (7/16") to disconnect the hard brake line from the flexible brake hose connection. Cap all open fittings. Remove any retaining clips securing lines to rear suspension or differential housing.
4. 4

   Disconnect lines at ABS modulator and junction blocks
   Locate the ABS modulator assembly (typically mounted in engine compartment or frame rail). Using appropriate flare nut wrenches, disconnect all hard line connections feeding to and from the modulator. The Viper ABS system has multiple junction points—carefully label each line with tape indicating its destination (LF, RF, LR, RR) before removal. Remove lines from any intermediate junction blocks along frame rails, noting exact routing.
5. 5

   Disconnect lines at master cylinder
   At the master cylinder, use a flare nut wrench to disconnect the primary and secondary outlet lines (verify exact master cylinder location and outlet arrangement against factory service documentation for the 2005 Viper). These are typically 3/8" or 7/16" fittings. Have towels ready as residual fluid will drain from master cylinder. Note which port feeds which circuit (front/rear or diagonal split).
6. 6

   Remove brake lines from vehicle
   Working from front to rear, release all remaining retaining clips and brackets securing brake lines to frame rails, subframe, and body. The lines pass through the firewall and along the frame—carefully note all mounting points and grommet locations. Remove the complete hard line assembly. Inspect mounting points for corrosion or damage that should be addressed before new line installation.
7. 7

   Inspect and prepare mounting points
   Clean all brake line mounting brackets and clips with a wire brush. Remove any corrosion from threaded fittings at master cylinder, ABS modulator, junction blocks, and caliper connection points using a wire brush or thread chaser. Inspect firewall and body pass-through grommets—replace if cracked or deteriorated. Verify all mounting clips are serviceable; replace bent or broken clips.
8. 8

   Route and install main brake lines
   Beginning at the master cylinder, route the new brake lines following the exact OEM path photographed during removal. Install new grommets at firewall pass-through. Feed lines along frame rails, ensuring clearance from exhaust components (critical on Viper due to side-exit exhaust routing), driveshaft, suspension arms, and steering components. Install retaining clips loosely at all mounting points but do not fully tighten—allow adjustment for final fitment.
9. 9

   Connect lines at master cylinder
   Thread brake lines into master cylinder ports hand-tight first to ensure proper thread engagement. Use flare nut wrench to tighten connections to the factory-specified torque for the 2005 Viper brake line fittings (verify exact torque values against the OEM service manual before final tightening). Do not overtighten or use standard wrenches that can round fittings. Verify no cross-threading before final tightening.
10. 10

    Connect lines at ABS modulator and junction blocks
    Using your labeling from removal, connect each line to the correct port on the ABS modulator and any intermediate junction blocks. Hand-start all fittings first, then tighten with flare nut wrench. Verify each connection is secure and properly seated with no visible gaps at flare seats.
11. 11

    Connect lines to caliper flexible hoses
    At each corner, route the hard line to the flexible brake hose connection point. Ensure adequate loop or routing to allow full suspension travel without line tension. Connect fittings hand-tight first, then torque with flare nut wrench. Verify lines do not contact suspension components, tires, or frame through full steering lock and suspension compression/extension.
12. 12

    Secure all line retaining clips and brackets
    Working front to rear, verify all brake lines are properly seated in mounting clips and brackets. Tighten all bracket bolts and secure all retaining clips. Double-check clearance at critical points: exhaust system, driveshaft, suspension arms at full droop and compression, and steering components at full lock. Adjust routing as needed before final clip installation.
13. 13

    Fill master cylinder and begin bleeding procedure
    Fill master cylinder reservoir to MAX line with fresh DOT 3 (or DOT 4 equivalent) brake fluid. Bleed brakes in the following sequence (furthest from master cylinder first): passenger rear, driver rear, passenger front, driver front. At each wheel, attach bleeder hose to bleeder screw and submerge other end in catch bottle with clean fluid. Have assistant pump brake pedal 5-10 times and hold, then open bleeder screw 1/2 turn. Close bleeder before pedal reaches floor. Repeat until no air bubbles appear in discharged fluid. Maintain reservoir level above MIN throughout bleeding—never allow to run dry.
14. 14

    Perform ABS modulator bleeding procedure
    The Viper ABS system requires activation of the ABS pump to purge air from the modulator. This requires a scan tool with ABS bleeding function capability. Connect scan tool and follow manufacturer bleeding procedure to cycle ABS solenoids. After ABS bleeding cycle, repeat manual bleeding at all four wheels in standard sequence. If a scan tool with ABS bleeding capability is not available, do not attempt to complete this repair—the modulator cannot be reliably bled without it. Have the vehicle finished at a shop equipped with the appropriate diagnostic tool before returning it to service.
15. 15

    Verify brake pedal feel and inspect for leaks
    With vehicle still raised, have assistant apply firm brake pedal pressure (50+ lbs) and hold for 60 seconds. Inspect every connection point for fluid seepage or leaks: master cylinder outlets, ABS modulator connections, junction blocks, caliper hose connections, and all line unions. Wipe all fittings dry, reapply pressure, and re-inspect. Pedal should feel firm with no spongy feel or pedal fade. If pedal is soft, repeat bleeding procedure.

Reassembly

1. Reinstall all four wheels and hand-tighten lug nuts in star pattern
2. Lower vehicle to ground and torque lug nuts to specification in star pattern
3. Reconnect battery negative terminal
4. Top off master cylinder reservoir to MAX line with DOT 4 brake fluid and reinstall cap
5. Clean any spilled brake fluid from painted surfaces immediately with water

Verification

• Start engine and verify brake warning light extinguishes and ABS light cycles normally
• Pump brake pedal 10-15 times with engine running—pedal should remain firm and high with no fade
• Perform low-speed brake test in safe area (5-10 mph) to verify even braking with no pull
• Perform moderate brake test (30 mph) to verify stopping power and ABS function
• Re-inspect all brake line connections for leaks after test drive
• Check master cylinder fluid level—should remain at MAX with no significant drop indicating leaks
• Verify brake pedal height and feel match pre-repair condition
• Advise owner to avoid aggressive braking for first 50-100 miles to allow system to fully stabilize and any residual microscopic air to purge

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