Lincoln Corsair: Engine System - General Information / General Procedures - Piston Protrusion Check

Special Tool(s) / General Equipment

Check

1. Verify that the cylinder block deck surface and the pistons are clean.
   

1. The piston protrusion is measured in-line front and rear avoiding raised or etched marking.
   

1. NOTE: Use a commercially available deck bridge such as the Proform® 66797 Magnetic Deck Bridge or equivalent.

   • Using the dial indicator and a commercially available deck bridge, position at one of the points on the cylinder block deck surface.
     Use the General Equipment: Dial Indicator
   • Zero the dial indictor on the cylinder block deck surface.
     

1. NOTICE: Only rotate the crankshaft clockwise.

   NOTICE: The piston must remain at TDC or an inconsistent reading will result.

   • Position the dial indicator and a commercially available deck bridge, over the piston.
     Use the General Equipment: Dial Indicator
   • Rotate the crankshaft until the piston is at TDC .
     Use the General Equipment: Dial Indicator
   • Record the reading.
     

1. • Move the dial indicator and the commercially available deck bridge, on the cylinder block deck surface at the opposite position.
     Use the General Equipment: Dial Indicator
   • Zero the dial indictor on the cylinder block deck surface.
     

1. • Move the dial indicator and the commercially available deck bridge, onto the piston at the opposite position.
     Use the General Equipment: Dial Indicator
   • Record the reading.
     

1. Average the readings and record.
   

1. Repeat on the remaining pistons.
   

1. Determine the cylinder head gasket thickness.