Crankshaft Main Bearing Journal - Clearance

Fig 1: Identifying Plastigage

Courtesy of FORD MOTOR CO.

NOTE: Crankshaft main bearing journals must be within specifications before checking journal clearance.

Remove the crankshaft main bearing caps and crankshaft main bearing.
Lay a piece of Plastigage across the face of each crankshaft main bearing surface.

Fig 2: Applying Plastigage To Crankshaft Journal
Courtesy of FORD MOTOR CO.

NOTE: Do not turn the crankshaft while carrying out this procedure.

Install and remove the crankshaft main bearing cap.
Verify the crankshaft journal clearance.
- Refer to SPECIFICATIONS
- If out of specification, install new components as necessary.
Fig 3: Using Plastigage To Measure Crankshaft Journal Clearance
Courtesy of FORD MOTOR CO.