It is necessary to maintain the valve clearances as they ...
allow for lengthening of the valves owing to the heat of combustion
reduce the resistance to sliding that occurs between the cam and the tappet
increase the speed at which the valves move up and down
make the crankshaft turn smoothly
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everydayhoroscopes.com
10 Signs You Are Being Used
Relationships, whether friendships, romantic bonds, or work connections, are often in a delicate balance. Sometimes, it is difficult to tell whether someone's intentions are sincere or not. Learn the telltale signs that you may be being taken advantage of!
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