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Review on 24 Rocker Arms Set 3L3Z-6564-A - Optimized for Fo-rd Explorer Mustang Expedition Navigator Mercury Mountaineer F250 F350 F450 F550 4.6L 5.4L V8 (2005-2010) by Ryan Larson

Revainrating 5 out of 5

This is just a piece of information for you young people: Tappets are not tappets and vice versa

Both tappets and tappets adjust valve clearance. The elevators are hydraulic, but the pushers aren't, so of course they're called pushers, they go knock-knock-knock. As my now ex-uncle said, Jim, if they make noise, you know you haven't burned your valves! IMHO Ford kept screwing up this engine, they forgot the KISS rule.

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