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2. Rocker cover gasket - Wikipedia

   en.wikipedia.org/wiki/Rocker_cover

   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.

3. AMC straight-6 engine - Wikipedia

   en.wikipedia.org/wiki/AMC_straight-6_engine

   The cast aluminum valve cover featured 15 bolts, the industry's most, to achieve a positive seal. [26] The new engine, which was introduced in 1986 for the 1987 model year, was a further evolution of AMC's 258 six. [27] [28] It had a 3.875 in (98.4 mm) bore and a 3.414 in (86.7 mm) stroke giving it a displacement of 241.6 cu in (4.0 L). [29]

4. Chevrolet Inline-4 engine - Wikipedia

   en.wikipedia.org/wiki/Chevrolet_Inline-4_engine

   The Chevrolet Inline-4 engine was one of Chevrolet's first automobile engines, designed by Arthur Mason and introduced in 1913. Chevrolet founder Billy Durant, who previously had owned Buick which had pioneered the overhead valve engine, used the same basic engine design for Chevrolet: exposed pushrods and rocker arms which actuated valves in the detachable crossflow cylinder head.

5. Subaru EJ engine - Wikipedia

   en.wikipedia.org/wiki/Subaru_EJ_engine

   The seals installed onto the ends of the sparkplug pipes seal against the valve covers and should be replaced when the valve cover is removed. pistons on the engines have a 0.5 mm (0.020 in) offset, with the engine having a compression ratio of 10.0 to 1.

6. Head gasket - Wikipedia

   en.wikipedia.org/wiki/Head_gasket

   In an internal combustion engine, a head gasket provides the seal between the engine block and cylinder head(s). Its purpose is to seal the combustion gases within the cylinders and to avoid coolant or engine oil leaking into the cylinders. [1] Leaks in the head gasket can cause poor engine running and/or overheating.

7. Crankcase ventilation system - Wikipedia

   en.wikipedia.org/wiki/Crankcase_ventilation_system

   The crankcase air outlet, where the PCV valve is located, is generally placed as far as possible from the crankcase breather. For example, the breather and outlet are frequently on opposite valve covers on a V engine, or on opposite ends of the valve cover on an inline engine. The PCV valve is often, but not always, placed at the valve cover ...