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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (6.4L Engine (Service Information)) >> Lubrication >> Diagnosis And Testing >> Checking Engine Oil Pressure

Checking Engine Oil Pressure

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  1. Remove oil pressure sending unit and install gauge assembly (special tool #C-3292A, Gauge, Pressure).
  2. Run engine until thermostat opens.
  3. Check oil pressure gauge:
    • Curb Idle - 25 kPa (4 psi) minimum
    • 3000 RPM - 170 - 758 kPa (25 - 110 psi)
  4. If oil pressure is 0 at idle, shut off engine. Check for a clogged oil pick-up screen or a pressure relief valve stuck open.
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