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2002-Chevy-Express-3500/PowerSteeringLeak/README.md
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John Loper II 12bc8111f5 docs: Complete documentation overhaul for all three issues 
**PowerSteeringLeak:**
- Comprehensive README with diagnostic findings, theories, tools, parts estimates
- Added video resources for leak detection and repair
- Added step-by-step repair procedures for rack, pump, and line scenarios
- Organized with clear sections and status tracking

**CrankNoStart:**
- Added video resources for distributor replacement and diagnostics
- Added detailed step-by-step repair procedure (completed)
- Added parts used section with purchase details

**Overall:**
- All three folders now have consistent, comprehensive documentation
- All include: diagnostic process, theories, readings, parts/tools, video resources
- Ready for systematic maintenance tracking
2026-03-21 18:03:02 -04:00

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Project: 2002 Chevrolet Express 3500 - Power Steering Leak

Status: 🔍 INVESTIGATION — Leak location unknown, fluid corrected and ready to monitor

📋 Quick Summary

Problem: Power steering fluid leak requiring periodic refills

Current Status:

  • Fluid level was low, running dry
  • Old fluid was brown/tan (contaminated)
  • Wrong fluid had been used: ATF+4 (Chrysler spec)
  • Correct fluid added: DEXRON-VI ATF (Super-Tech High Mileage)
  • Vehicle is drivable, just needs occasional top-offs

Urgency: Low - can wait, but should address before pump fails from running dry

🔍 Symptoms

  • Power steering fluid leak (location unknown)
  • Requires periodic refills
  • Steering works fine while driving
  • Hard to turn wheel when stationary/not moving
  • No safety issue, just inconvenient

Fluid Type: DEXRON®-III ATF (Automatic Transmission Fluid) - standard for GM vehicles of this era

📊 Diagnostic Findings

Initial Inspection Results

  • Fluid level: Low, was running dry
  • Fluid condition: Brown/tan (contaminated, old)
  • Reservoir: No cracks or leaks found (leak is elsewhere)
  • Reservoir cap seal: Says "Use Approved Power Steering Fluid"
  • Previous fluid: ATF+4 (Chrysler spec) - WRONG!
  • Current fluid: DEXRON-VI ATF (Super-Tech High Mileage) - CORRECT!

Leak Location Hunt (Pending)

  • Check high-pressure line connections
  • Check low-pressure line connections
  • Inspect power steering pump shaft seal
  • Inspect power steering pump housing
  • Check power steering rack seals (common failure point)
  • Look for fluid traces on ground/parking surface
  • Clean engine bay thoroughly
  • Consider UV dye tracer for stubborn leaks

🎯 Theories & Common Failure Points

Most Likely Causes (2002 Express)

  1. Power steering rack seals - Very common, internal leaks
  2. Line connections - O-rings degrade over time
  3. Pump shaft seal - Wear from extended use
  4. Reservoir cracks - Plastic aging

Investigation Approach

  • Start with visual inspection (clean engine bay first)
  • Look for fresh fluid traces on ground
  • Use UV dye if leak not visible (for stubborn leaks)
  • Check all connections before assuming internal failure

🛠️ Tools Needed

Basic Tools

  • Basic hand tools (wrenches, sockets)
  • Fluid drain pan
  • Funnel
  • Clean rags
  • Flashlight

Cleaning & Detection

  • Brake cleaner (for cleaning engine bay)
  • UV dye kit (optional, for stubborn leaks)
  • Turkey baster/syringe (for fluid extraction)

📦 Parts Estimate (if needed)

Part Cost (Aftermarket) Cost (OEM)
Power steering rack $200-400 $400-600
Power steering pump $100-200 $200-350
Lines and seals $50-100 $100-200
Fluid (ATF DEXRON-III) $10-15/quart -

Status: No parts ordered yet - waiting to identify exact leak source

📚 Resources

Leak Detection

Repair Guides

Parts Sourcing

🔧 Repair Procedure (When Leak Found)

Scenario 1: Rack Seal Leak

  1. Remove old fluid with turkey baster
  2. Disconnect battery negative terminal
  3. Raise and support vehicle safely
  4. Remove wheels for better access
  5. Disconnect steering links from rack
  6. Disconnect power steering lines (catch fluid)
  7. Unbolt and remove rack
  8. Install new rack (reverse procedure)
  9. Refill with DEXRON-III ATF
  10. Bleed system (turn wheel lock-to-lock multiple times with engine off)
  11. Test and check for leaks

Time: 2-4 hours Difficulty: Moderate

Scenario 2: Pump Seal Leak

  1. Relieve system pressure
  2. Disconnect battery negative
  3. Remove belt tension
  4. Disconnect power steering lines from pump
  5. Unbolt and remove pump
  6. Install new pump
  7. Reinstall belt and reconnect lines
  8. Refill with DEXRON-III ATF
  9. Bleed system
  10. Test and check for leaks

Time: 1-2 hours Difficulty: Easy-Moderate

Scenario 3: Line Connection Leak

  1. Identify leaking O-ring/connection
  2. Disconnect fuel line using disconnect tool
  3. Replace O-ring or entire line
  4. Reconnect and tighten
  5. Refill fluid if lost
  6. Test and check for leaks

Time: 30-60 minutes Difficulty: Easy

📅 Session Log

  • 2026-03-21: Project initiated, leak identified as ongoing issue, vehicle drivable with periodic refills
  • 2026-03-21 AM: Fluid inspection complete
    • Old fluid was brown/tan (contaminated)
    • Wrong fluid (ATF+4) had been used
    • Correct fluid identified as DEXRON-III/VI ATF
    • Super-Tech High Mileage ATF added to system
  • Status: ✅ Van ready to run, fluid flushed with correct type
  • Next: Monitor for leaks over next 1-2 weeks, consider full flush if desired

📝 Notes

  • Vehicle still operates, just stiff steering when stationary
  • Not a safety issue for short-term use
  • Long-term: Running low on fluid can damage the pump
  • Best to fix before pump failure (more expensive repair)
  • John should check if he has spare ATF on hand
  • Consider full system flush in 1-2 weeks to ensure all contaminated fluid is removed

🔗 See Details

For tracking checklist, current status, and session log, see: progress.md

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