Tutorial how to make engine part 22

Assembly 2
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Step 1:
insert a piston and a connecting rod
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Step 2:
make contentric this surfaces
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Step 3:
select right plane of the piston and click on matte command
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Step 4:
find connecting rods front plane from feature tree
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Step 5:
make them coincident
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Step 6:
make this survaces concentric
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Step 7:
confirm that
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Step 8:
use matte command again and select this surfaces
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Step 9:
click on ok
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Step 10:
add 11 more piston and connecting rod . unfortunately you have to make same things for all