Connecting Rod Bearing Journal-to-Bearing Clearance

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to the SPECIFICATIONS .

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 1: Positioning 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.

Fig 2: Measuring Plastigage To Get Connecting Rod Bearing Journal Clearance

Courtesy of FORD MOTOR CO.