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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)) >> Engine Block >> Lifter(S), Hydraulic, Roller >> Diagnosis And Testing >> Diagnosis And Testing - Hydraulic Roller Lifters >> High

Diagnosis And Testing - Hydraulic Roller Lifters: High

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If oil level is above the FULL mark, it is possible for the connecting rods to dip into the oil. With the engine running, this condition could create foam in the oil pan. Foam in oil pan would be fed to the hydraulic lifters by the oil pump causing them to lose length and allow valves to seat noisily.

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