What causes a crankshaft thrust bearing to fail?
What causes a crankshaft thrust bearing to fail? Naturally, improper assembly—se- lecting the wrong thrust bearing thick- ness, contamination during assembly, etc.—can lead directly to thrust bearing failure. In general, though, one or more associated problems are usually to blame, including poor crankshaft sur- face finish, bearing overloading or bear- ing surface misalignment. What should the thrust surface be on a crankshaft? Finally, following the above procedures with care should; maintain a thrust surface that is 90° to the crankshaft centerline. Tighten main cap bolts to approximately 10 to 15 ft.lb. to seat bearings; then loosen. Tap main cap toward...