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It is the space between the top of the piston and the bottom of the cylinder head. Great care should be used when putting an engine back together to make sure the bump clearance is not 0 so that the piston will not hit the head cylinder.
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The volume occupied by the cylinder when the piston is at top dead centre is called clearence valume.
Well...... you need A LITTLE bit of clearance for the gas mixture to lubricate the piston and cylinder. Plus your piston expands when it gets hot.
engines cease because, it is our misconception that the cylinder of the engine is cylindrical,in actual the cylinder walls are slightly slanting. and th diameter of the piston is a bit less than that of the cylinderwalls,which is known as clearance,,which is formulated for the smooth running of piston,,but when the temperature inside the cylinder increases above a certain level,the walls of the cylinder and the piston expands.but the expansion ratio is different for both,,as the cylinder is made of cast iron and piston with aluminium,which decreases the gap to certain level that there is no movement of piston,which is called as ceasinf of engine.
oil
0.003" ~ 0.004"
excessive piston to bore clearance means that the gap (tollerance) between your piston and the sidewall of your cylinder/block is too large. usually will cause blow-by. the burning of oil, and dark exhaust smoke. also may cause the engine to have a weak compression stroke
Piston is the device with a cup like shape that fit completely in the Cylinder.
The volume between the engine head and piston when the piston is in the head dead center piston R - is expressed in cubic inches
A cylinder is the central working part of a reciprocating engine, the space in which a piston travels.
The "cylinder jug" is the cylinder. This is the area that the piston and piston rings moves up and down in when the engine is turning.