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A rocker cover, (UK), or valve cover (elsewhere) is a cover that encloses the rocker arm in an internal combustion engine, bolting with a gasket seal to the engine head. Engines with more than one head (such as a V8 ) will have multiple rocker covers.
Valve covers were die-cast magnesium (AZ91D alloy), rather than stamped steel; this lowered noise levels and made for better gasket sealing. [ citation needed ] The Magnum V10 first became available in the 1994 model year Dodge Ram 2500 and 3500 (above 8,500 pounds GVWR), [ citation needed ] and was the most powerful gasoline-burning engine ...
The positive crankcase ventilation (PCV) system utilized a plastic oil separator box that was vented directly to the block itself; the breather hose and PCV valve hoses attached to the box, and connected to the induction system. Later engines featured a PCV system that was molded to the cylinder head valve cover.
Head gasket with a leak between the rightmost and centre cylinders. A leak in the head gasket - often called a "blown head gasket" - can result in a leak of coolant, the combustion gasses, or both. Blue smoke from the exhaust suggests that excess oil is entering the combustion chambers (although there are other possible causes than a head ...
The largest displacement version of the Essex V6 appeared in the 1997 model year as a replacement for the Ford 300 straight six in the F-150. This engine kept the 3.8 L's bore, but featured a stroke lengthened to 95 mm (3.74 in), bringing its displacement up to 4,195 cc (256.0 cu in).
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