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2. Long-bolt engine - Wikipedia

   en.wikipedia.org/wiki/Long-bolt_engine

   A long-bolt or through-bolt engine is an internal combustion piston engine where, following usual practice, the cylinder head is held down by bolts or studs. Conventionally the cylinder head is bolted to the cylinder block and the crankshaft main bearings are in turn bolted to the crankcase by separate bolts. [notes 1] In the long-bolt engine ...

3. Threaded rod - Wikipedia

   en.wikipedia.org/wiki/Threaded_rod

   "Waisted" or "undercut" studs, as engine cylinder head retainers. With respect to shape, stud bolts a.k.a. studs are categorized into three basic types: "fully threaded stud bolts", "tap-end stud bolts", and "double-end stud bolts". Each of these studs have different application.

4. Cylinder head - Wikipedia

   en.wikipedia.org/wiki/Cylinder_head

   In a piston engine, the cylinder head sits above the cylinders, [1] 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 .

5. Torque-to-yield fastener - Wikipedia

   en.wikipedia.org/wiki/Torque-to-yield_fastener

   It is therefore beneficial in high-frequency high-load situations with a higher risk of fatigue related failure, like a bolted down cylinder head, to use torque to yield bolts. [ citation needed ] The torque applied to the fastener must be determined such that it does not contribute to a service condition where the fastener enters a low-cycle ...

6. Heron cylinder head - Wikipedia

   en.wikipedia.org/wiki/Heron_cylinder_head

   The head is machined flat, with recesses only for inlet and exhaust valves, spark plugs, injectors and so on. The combustion chamber itself is contained within a dished depression in the top of the piston. The Heron head is suitable for petrol and diesel engines, for ohv and ohc valve-gear, and for small and large engine displacement capacities.

7. Russia attacks Ukraine's capital, rules out returning any ...

   www.aol.com/news/russia-attacks-ukraines-capital...

   Russia's defense ministry said it had carried out a "group missile strike" on Ukrainian military-industrial sites that produce drones, claiming in a social media post that, "all planned targets ...