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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.
The 4.2 L Essex has been described as one of the more reliable engines offered in the F-150 at the time, although the early engines did encounter some well-known problems. [11] All 1997–1998 engines made at the Canadian Essex plant received a bad front cover gasket. [12]
A long block does not include the fuel system, electrical, intake, and exhaust components, as well as other components. A long block may include the balancer/damper, timing cover, oil pan and valve covers. [5] A long block engine replacement typically requires swapping out parts from the original engine to the long block.
PCV valve on Ford Taunus V4 engine (feeding from left side valve cover into the inlet manifold) A crankcase ventilation system (CVS) removes unwanted gases from the crankcase of an internal combustion engine. The system usually consists of a tube, a one-way valve and a vacuum source (such as the inlet manifold).
The UVCH (under valve cover harness) was prone to losing contact with either glow plugs or injectors which caused rough starts or a misfire depending on the year. 1994–1997 engines have two connectors going into each bank, whereas 1999–2003 engines had one connector going into each bank; troubleshooting the harness was easier for the 1994 ...
The bore was increased to 3.75 in (95.25 mm), and stroke increased to 3.4 in (86.4 mm), increasing displacement to 225 cu in (3.7 L). Since the engine was similar to the popular small-block Buick V8—now with a cast-iron block and displacement of 300 cu in (4.9 L), the engine was made cheaply at the same factory with much of the same tooling.
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