Connecting Rod - Bearing Journal Clearance

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

Special Tool(s)

Fig 1: Identifying Special Tool(s)

Courtesy of FORD MOTOR CO.

NOTE: The crankshaft connecting rod journals must be within specifications to check the connecting rod bearing journal clearance.

Remove the connecting rod bearing cap.
Position a piece of Plastigage across the bearing surface.

Fig 2: Positioning A Piece Of Plastigage Across Bearing Surface
Courtesy of FORD MOTOR CO.

NOTE: Do not turn the crankshaft during this step.

Install and tighten to specifications, then remove the connecting rod bearing cap.
Measure the Plastigage to get the connecting rod bearing journal clearance. The Plastigage should be smooth and flat. A changing width indicates a tapered or damaged connecting rod or connecting rod bearing.

Refer to ENGINE - 3.9L & 4.2L for the procedure.
If out of specification, install new components as necessary. Refer to ENGINE - 3.9L & 4.2L for the procedure .

Fig 3: Measuring Connecting Rod Bearing Journal Clearance

Courtesy of FORD MOTOR CO.