Procedure for Cylinder head maintenance In a piston engine, the cylinder head sits above the cylinders, forming the roof of the combustion chamber. In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins. In more modern overhead valve and overhead camshaft engines, the head is a more complicated metal block that also contains the inlet and exhaust passages, and often coolant passages, valvetrain components, and fuel injectors ■ If yo

Àánú, MPH | FAMILIA PABLANU on Instagram: "If birth is a natural bodily function, why would a normal, healthy woman have retained placenta or hemorrhage? She wouldn't and doesn't (and I am living proof, twice). Them: You're so lucky... Many things could have gone wrong! "Unfortunately, we are so conditioned to expect things to go wrong that we forget that giving birth is a natural process and perfectly possible without medical staff...after all, it happens "accidentally" all the time (like babie