Q:

Do Hydraulic Lifters Need to be Primed with Oil?

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Many people mistakenly believe that hydraulic lifters must be soaked in oil overnight and be hand pumped up with a pushrod before installing into a new engine, however this is not necessary. In fact, this could cause the lifter to act as a 'solid' and prevent obtaining proper preload. What is very necessary is the priming of the entire engine?s oil system before starting up a new engine for the first time. This is done by turning the oil pump with a drill motor to force oil throughout the entire engine. Crane Cams offers oil pump primers for Chevrolet and Ford engines.
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