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HOMESERVICE MANUALSJEEP2014GRAND CHEROKEE LAREDO, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (5.7L ENGINE (SERVICE INFORMATION))STANDARD PROCEDUREHYDROSTATIC LOCK
2014 Jeep Grand Cherokee Laredo, AWD

Hydrostatic Lock

2014 Jeep Grand Cherokee Laredo, AWDSECTION Hydrostatic Lock
WARNING: This page is about a different variant/trim than selected.
CAUTION:

Do not attempt to run engine. Severe damage could occur.

When an engine is suspected of hydrostatic lock (regardless of what caused the problem), follow the steps below.

  1. Perform the Fuel Pressure Release Procedure. Refer to FUEL SYSTEM PRESSURE RELEASE .
  2. Disconnect the negative battery cable(s) from the battery.
  3. Inspect air cleaner, induction system, and intake manifold to make sure the system is dry and clear of foreign material.
  4. Place a shop towel around the spark plugs to catch any fluid that may possibly be under pressure in the cylinder head. Remove the spark plugs.
  5. With all spark plugs removed, rotate the crankshaft using a breaker bar and socket.
  6. Identify the fluid in the cylinders (coolant, fuel, oil).
  7. Make sure all fluid has been removed from the cylinders.
  8. Repair engine or components as necessary to prevent this problem from occurring again.
  9. Squirt a small amount of engine oil into the cylinders to lubricate the walls. This prevents damage on restart.
  10. Install new spark plugs. Tighten the spark plugs to 41 N.m (30 ft. lbs.).
  11. Drain engine oil. Remove and discard the oil filter.
  12. Install the drain plug. Tighten the plug to 34 N.m (25 ft. lbs.).
  13. Install a new oil filter.
  14. Fill the engine crankcase with the specified amount and grade of oil. Refer to CAPACITIES AND RECOMMENDED FLUIDS, SPECIFICATIONS .
  15. Connect the negative battery cable(s).
  16. Start the engine and check for any leaks.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.