Component Tests and General Diagnostics

1. Remove intake manifold (9424) and valve tappets (6500).
2. Clean crankshaft journals. Inspect journals and thrust faces for nicks, burrs or roughness that would cause premature bearing wear.

NOTE: Do not turn crankshaft while Plastigage(R) is in place.

3. Place a piece of Plastigage(R) D81L-6002-B or equivalent on bearing surface across full width of bearing cup and about 6.35 mm (0.25 inch) off center.
4. Install cap and tighten bolts to specification.
5. Remove cap. Using Plastigage(R) scale, check width of Plastigage(R) at widest point to get minimum clearance. Check at narrowest point to get maximum clearance. Difference between reading is taper of journals.
6. If crankshaft journals are damaged or if bearing clearance exceeds the specified limits, refinish the crank journals to 0.254 mm (0.010 inch) undersize, and use the appropriate undersize bearings.
7. After bearing has been fitted and cleaned, apply a light coat of clean engine oil meeting Ford specification WSS-M2C153-F to journal and bearings. Install bearing cap. Tighten cap bolts to specification.
8. Repeat procedure for remaining bearings that require replacement.