Titan 2WD V8-5.6L (VK56) (2004)
Check if surface of valve lifter has any wear or cracks.
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If any damage is found, replace valve lifter
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Select the thickness of the head so that valve clearance is the standard when replacing.
Valve Lifter Clearance
Valve Lifter Diameter
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Measure diameter of valve lifter
Standard: 33.977 - 33.987 mm (1.3377 - 1.3381 inch)
Valve Lifter Hole Diameter