Crankshaft Main Bearing Journal - Clearance

Special Tool(s) 

Fig 1: Identifying Special Tool(s)

Courtesy of FORD MOTOR CO.

1. Remove the crankshaft main bearing caps and crankshaft main bearing.
2. Lay a piece of Plastigage across the face of each crankshaft main bearing surface.
   Fig 2: Laying Piece Of Plastigage Across Face Of Each Crankshaft Main Bearing Surface

   Courtesy of FORD MOTOR CO.
NOTE: Do not turn the crankshaft while carrying out this procedure.
3. Install and remove the crankshaft main bearing cap.
4. Verify the crankshaft journal clearance.
   • If out of specification, install new components as necessary.
     Fig 3: Measuring Plastigage To Determine Crankshaft Journal Clearance

     Courtesy of FORD MOTOR CO.