brakes

Brake Bleed - All Four

for 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD
Difficulty
Moderate
Time
1.6 h
Tools
11
Steps
10

Complete bleeding of all four brake circuits to remove air from the hydraulic system, ensuring proper brake pedal feel and stopping performance.

Warnings

⚠️SAFETY-CRITICAL SYSTEM: Brake system failure can result in loss of vehicle control, serious injury, or death. If any step is unclear or components appear damaged, immediately seek professional service.
⚠️Never reuse brake fluid that has been bled from the system. Contaminated or aerated fluid must be properly disposed of.
⚠️Do not allow brake fluid to contact painted surfaces - it will permanently damage paint. Keep rags ready to catch spills.
Vehicle weighs over 7,000 lbs. Ensure jack and jack stands are properly rated and positioned on frame rails or designated lift points only.
Brake fluid absorbs moisture from air. Use only fresh, unopened DOT 4 fluid and keep master cylinder cap on when not actively bleeding.
Do NOT let master cylinder reservoir drop below MIN line during bleeding or air will re-enter system requiring complete restart.
ℹ️This procedure assumes ABS system is functioning properly. If ABS warning light is on, additional scanner-activated bleeding may be required.

Tools required

Brake bleeder wrench or 10mm box-end wrenchEssential
Clear brake bleeder hose (minimum 2 feet)Essential
Clear collection container (minimum 1 quart capacity)Essential
Turkey baster or brake fluid suction toolEssential
Torque wrench (5-200 Nm range)Essential
Floor jack rated for 7,000+ lbsEssential
Jack stands rated for 7,000+ lbs (set of 4)Essential
Wheel chocksEssential
21mm socket for lug nutsEssential
Assistant (recommended for two-person bleeding method)
Pressure bleeder (alternative method)

Parts

  • Mopar DOT 4 Brake Fluid × 2 — Use OEM specification

Fluids

  • Mopar DOT 4 Brake Fluid — 1.5 qt

Preparation

  1. Park vehicle on level, solid surface and place wheel chocks behind rear wheels if lifting front first
  2. Ensure engine is off and ignition key is removed
  3. Open hood and locate brake master cylinder reservoir on driver side firewall
  4. Remove master cylinder reservoir cap and inspect fluid level and condition - fluid should be clear amber, not dark or contaminated
  5. Using turkey baster or suction tool, remove old brake fluid from reservoir until approximately half empty
  6. Refill reservoir to MAX line with fresh Mopar DOT 4 brake fluid from unopened container
  7. Raise vehicle using floor jack at manufacturer-designated lift points and support securely on all four jack stands
  8. Remove all four wheels using 21mm socket, storing lug nuts in organized manner
  9. Inspect all four brake calipers and lines for leaks, damage, or corrosion - address any issues before bleeding
  10. Prepare clean collection container and attach clear bleeder hose to wrench

Procedure

  1. 1
    Bleed right rear brake caliper
    Begin with the wheel furthest from master cylinder (right rear). Locate bleeder screw on back of caliper assembly, typically covered with rubber cap. Remove rubber cap and clean area around bleeder screw. Attach clear bleeder hose to bleeder screw and place other end in collection container. Have assistant slowly depress brake pedal to floor and hold. While pedal is held down, open bleeder screw 1/2 to 3/4 turn using brake bleeder wrench. Observe fluid and air bubbles flowing through clear hose. When flow stops, close bleeder screw finger-tight, then have assistant release pedal. Wait 3-5 seconds, then repeat process 5-10 times until no air bubbles appear in hose and only clean fluid flows. Check master cylinder reservoir level after every 3-4 pumps and refill to MAX as needed.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  2. 2
    Verify right rear completion and torque bleeder
    After final bleeding cycle with pedal down, close bleeder screw and torque to 10 Nm (7 lb-ft) - DO NOT OVERTIGHQUE as bleeder screws are brass and strip easily. Have assistant release pedal. Perform final check by having assistant pump pedal 3-4 times and hold - no air bubbles should appear when bleeder is momentarily cracked open. Remove bleeder hose, wipe area clean, and reinstall rubber cap. Top off master cylinder reservoir to MAX line.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  3. 3
    Bleed left rear brake caliper
    Move to left rear wheel (second furthest from master cylinder). Repeat same bleeding process as right rear: remove rubber cap, attach clear hose to bleeder screw, have assistant pump and hold pedal, open bleeder 1/2 to 3/4 turn, observe fluid flow, close bleeder, release pedal. Continue until no air bubbles appear and fluid runs clean. Monitor master cylinder reservoir level constantly - refill to MAX every 3-4 pumping cycles. Never allow reservoir to drop below MIN line.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  4. 4
    Verify left rear completion and torque bleeder
    Close and torque bleeder screw to 10 Nm (7 lb-ft). Perform verification check by pumping pedal and cracking bleeder - no bubbles should emerge. Remove hose, clean area, reinstall rubber cap. Top off master cylinder reservoir to MAX line.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  5. 5
    Bleed right front brake caliper
    Move to right front wheel (third in sequence). This caliper may have bleeder screw on top or rear of caliper body depending on caliper type. Remove rubber cap and attach clear hose. Repeat bleeding procedure: assistant pumps and holds pedal, open bleeder 1/2 to 3/4 turn, observe flow through clear hose, close bleeder, release pedal. Continue 5-10 cycles until fluid is completely clear with no air bubbles. Check and refill master cylinder reservoir frequently.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  6. 6
    Verify right front completion and torque bleeder
    Torque bleeder screw to 10 Nm (7 lb-ft) after final bleeding cycle. Verify no air remains by test-cracking bleeder with pedal held. Remove hose, clean area, reinstall rubber cap. Refill master cylinder reservoir to MAX line.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  7. 7
    Bleed left front brake caliper
    Move to left front wheel (closest to master cylinder, bled last). Remove rubber cap from bleeder screw and attach clear hose. Execute final bleeding sequence: assistant pumps and holds pedal, open bleeder 1/2 to 3/4 turn, monitor fluid flow for air bubbles, close bleeder, release pedal. Repeat until absolutely no air bubbles appear and fluid is crystal clear. This final wheel should produce clean fluid relatively quickly if previous wheels were done correctly.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  8. 8
    Verify left front completion and torque bleeder
    Torque final bleeder screw to 10 Nm (7 lb-ft). Perform verification by cracking bleeder with pedal held - should see only solid fluid stream with zero air. Remove hose, clean area, reinstall rubber cap. Fill master cylinder reservoir to MAX line with fresh DOT 4 fluid.
    Torque spec
    Bleeder Screw10 Nm (7 lb-ft)
  9. 9
    Perform complete system verification
    With all bleeders closed and torqued, have assistant pump brake pedal 10-15 times. Pedal should become firm and hold pressure when depressed. If pedal feels spongy or sinks slowly to floor, air remains in system and bleeding must be repeated starting from right rear. Once pedal is firm, go back to each wheel in sequence (RR, LR, RF, LF) and crack each bleeder screw briefly while assistant holds pedal - no air should emerge from any corner. If air appears at any wheel, re-bleed that corner completely.
  10. 10
    Reinstall wheels and perform final checks
    Install all four wheels, threading lug nuts by hand initially. Lower vehicle slightly so wheels contact ground but suspension is not fully loaded. Torque all lug nuts to 140 Nm (103 lb-ft) using star pattern (tighten opposite nuts in sequence, not consecutively around wheel). Fully lower vehicle and remove jack stands. Torque lug nuts again in star pattern to verify proper seating. Inspect ground under vehicle and around all brake components for any fluid leaks. Check master cylinder reservoir one final time and top off to MAX line if needed. Securely install reservoir cap.
    Torque spec
    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

  1. Verify all four bleeder screws are torqued to 10 Nm (7 lb-ft) and rubber caps are installed
  2. Confirm master cylinder reservoir is filled to MAX line with fresh DOT 4 fluid and cap is securely tightened
  3. Verify all four wheels are installed with lug nuts torqued to 140 Nm (103 lb-ft) in star pattern
  4. Wipe down any brake fluid spills on components or frame with clean rags
  5. Dispose of old brake fluid according to local environmental regulations - do not pour down drain

Verification

  • With engine off, pump brake pedal 10-15 times - pedal should be firm and hold position when held with moderate force
  • Pedal should not slowly sink to floor when held with constant pressure for 30 seconds
  • Start engine - pedal should drop slightly as brake booster activates, then remain firm
  • With assistant watching, press pedal firmly while checking all four calipers, brake lines, and master cylinder for leaks
  • In safe area with no traffic, perform low-speed brake test (15-20 mph) - brakes should engage smoothly without pulling to either side
  • Perform moderate brake test from 30-40 mph in safe area - vehicle should stop straight without pulsation or excessive pedal travel
  • If pedal feels spongy, travels too far, or vehicle pulls during braking, DO NOT DRIVE - repeat bleeding procedure or seek professional service
  • Test ABS function if equipped by performing controlled stop on gravel or low-traction surface at 15-20 mph - ABS should pulse normally without warning lights
  • Re-check master cylinder fluid level after test drive - should remain at MAX line with no significant drop indicating leaks

More procedures for this vehicle

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