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Tappet Clearance

Tappet clearance or Rocker clearance

It is the clearance given between between the top of the valve spindle and Rocker arm.

It is given for proper closening of valve at its operating temperature.

It is actually given by manufacturer and can be adjusted when engine is cold.

A normal procedure is taken out for the given unit piston should be at TDC in the power stroke and it should be checked through the push rod.

Significance of the clearances:

When the clearances is too small valve will open early and closes late.

While when the clearances is too large it will open late  and closes early .


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