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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (5.7L - Engine (Service Information)) >> Cylinder Head >> Diagnosis And Testing >> Cylinder Head Gasket Failure >> Cylinder-To-Water Jacket Leakage Test >> Visual Test Method

Visual Test Method

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With the engine cool, remove the coolant pressure cap. Start the engine and allow it to warm up until the thermostat opens.

If a large combustion/compression pressure leak exists, bubbles will be visible in the coolant.

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