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
Best and worst qualities of your zodiac sign
The best qualities of each Zodiac sign yet, the worst qualities of each Zodiac sign... Each sign has something to be proud of - and something they hate about themselves. Check out the best and the worst qualities of your sign below!
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The Type Of Person Each Zodiac Is Intensely Incompatible With
Discover which personality clashes with your zodiac sign the most. From the cautious type irking Aries to the homebody boring Sagittarius, see who you might want to steer clear of in the zodiac dance of compatibility.
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