Friday, April 25, 2025

Jeep Maintenance & Leak Inspection Checklist

Keep Your Jeep in Peak Condition 


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Routine Fluid Maintenance

  • Engine Oil

    • Change every 5,000 miles (synthetic) or 3,000 miles (conventional)

    • Don’t overtighten the oil filter cap on 3.6L engines (torque to 25 Nm)

  • Transmission Fluid

    • Change every 30,000 miles

    • Inspect for fluid level and clarity

  • Transfer Case Fluid

    • Change every 30,000 miles

    • Use Jeep-approved fluid only

  • Differential Fluid

    • Change every 30,000 miles

    • Check for gear oil leaks at the differential covers and axle seals

  • Brake Fluid

    • Replace every 2 years or 24,000 miles

    • Look for darkened fluid or air in the lines

  • Coolant/Antifreeze

    • Check level in overflow tank and radiator when engine is cold

    • Replace every 5 years or as recommended

    • Only use the correct coolant type to avoid chemical reactions (e.g., pink organic coolant issues)


🛠️ Top Places to Check for Leaks

Use this list to visually inspect your Jeep for potential fluid leaks:

  • Radiator (bottom side)

    • Look for pinkish buildup or crust—could signal coolant leaks

    • Pay attention to coolant smells even when parked

  • Oil Filter Housing Adapter

    • Common leak point in 3.6L Jeeps

    • Check underneath the intake manifold and down the back of the engine

  • Rear Main Seal

    • Inspect where the engine meets the transmission

    • Oil buildup or dripping may indicate failure

  • Front and Rear Differentials

    • Check around the diff covers, pinion seals, and axle shafts

    • Look for gear oil leaks and splatter on undercarriage

  • Transmission and Transfer Case

    • Watch for red or dark brown fluid at the rear or center of your Jeep

    • Inspect around the output shaft and tail housing


🧰 Additional Maintenance Must-Dos

  • Tire Rotation (every 5,000 miles)

    • Helps prevent uneven wear

    • While rotating, inspect brake pad thickness

  • Inspect Brake Pads

    • Every 12,000 miles

    • Replace if worn or cracked

  • Air Filter Replacement

    • Every 15,000–30,000 miles

    • Replace sooner if driving in dusty/off-road conditions

  • Undercarriage Care

  • Check for Fluid Cross-Contamination

    • Never mix coolant types (green and orange/pink)

    • Watch for signs of milky oil (could indicate coolant leak into oil)


🔧 Pro Tip:

Regular inspections can help you catch leaks and worn components before they cause serious (and expensive) damage. Keep a log of maintenance dates and fluid changes!

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