The engines of yesteryear were pretty simple, with tappets clackity-clacking away on cam lobes, opening valves, and making a ruckus while doing it. Mechanical lifters were adequate for valve operation ...
Q I purchased a 2000 Chevy Tahoe with 189,899 miles on it. The 5.3-liter engine produces a bad noise when it is cold, sounding more like a diesel than a gasoline engine. The noise goes away after ...
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