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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)) >> Cylinder Head >> Diagnosis And Testing >> Diagnosis And Testing - Cylinder Head Gasket Failure >> Cylinder-To-Cylinder Leakage Test

Cylinder-To-Cylinder Leakage Test

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To determine if an engine cylinder head gasket is leaking between adjacent cylinders, follow the procedures in Cylinder Compression Pressure Test in this article. An engine cylinder head gasket leaking between adjacent cylinders will result in approximately a 50-70% reduction in compression pressure.