1. Oil sump oil depends only on quantity, not quality. Some drivers only know how to add oil and ignore quality checks. As everyone knows, long-term use of oil contains a large number of oxides and metal shavings, resulting in reduced lubricating properties, parts wear increased. Therefore, the engine should be regularly changed according to the specified cycle.
2, only maintenance of air filter, maintenance of exhaust pipe and muffler. Some drivers never clear the exhaust pipe and muffler carbon deposits, resulting in too thick carbon deposits, exhaust cross-sectional area decreases, resulting in exhaust gas exhaust, fresh air into the lack of combustion deterioration.
3, cooling water just add, regardless of cooling effect. Some drivers never remove scale, although the cooling water is sufficient, but the cooling effect is poor, causing multiple failures.
4. Pay attention only to the quality of the plunger coupler and the injector needle valve assembly, and pay attention to the quality of the outlet valve assembly. One of the functions of the oil valve is sealing, that is to say, the plunger oil chamber is separated from the high-pressure fuel pipe to prevent backflow; the second is to quickly depressurize when the oil supply is stopped, so as to ensure that the fuel injector is cut off and brittle. Even if the delivery valve is of poor quality or worn out, it will cause many diesel engine failures.
5, only pay attention to the state of the valve and valve seat, do not pay attention to the quality of the valve spring. When the valve leaks, people are accustomed to checking the valve and valve seat and ignore the check of valve spring quality. It should be pointed out that the lack of elasticity of the valve spring is also one of the causes of the valve leakage failure.
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Tadalafil is an oral drug that is used for treating impotence (the inability to attain or maintain a penile erection) and benign prostatic hyperplasia (BPH). It is in a class of drugs called phosphodiesterase-5 (PDE5) inhibitors that also includes sildenafil (Viagra) and vardenafil (Levitra). Erection of the penis is caused by the filling of the penis with blood. Filling occurs because the blood vessels that bring blood to the penis increase in size and deliver more blood to the penis, and, at the same time, the blood vessels that take blood away from the penis decrease in size and remove less blood from the penis. Sexual stimulation that leads to an erection causes the production and release of nitric oxide in the penis. The nitric oxide causes an enzyme, guanylate cyclase, to produce cyclic guanosine monophosphate (cGMP). It is cGMP that is primarily responsible for increasing and decreasing the size of blood vessels carrying blood to and from the penis, respectively, and causing an erection. When the cGMP is destroyed by another enzyme, phosphodiesterase-5, the blood vessels return to their normal size, blood leaves the penis, and the erection ends. Tadalafil prevents phosphodiesterase-5 from destroying cGMP so that cGMP stays around longer. The persistence of cGMP leads to a more prolonged engorgement of the penis with blood.
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