CRANKSHAFT MAIN BEARINGS MAINTENANCE - CONTINUED
Never use any type of rough material or tools such as sandpaper, emery or crocus cloth, files, or glassbead
cleaning equipment to clean bearings.
See Cleaning instructions (WP 0316 00).
Apply a light coat of oil over the bearings and the bearing surface in the bearing caps if the bearings are not going to be
installed within one hour after cleaning.
Inspect main bearings and thrust bearing. Replace bearing if:
Back of bearing shows that fretting has taken place
Back of bearing has a mirror-like (shiny) finish
There are scratches in the bearing surface which do not disappear after cleaning
Bearing surface has material damage such as cracks or flaking
There is a hole in the bearing surface
Bearing shows wear on the mating face
Bearing oil hole is distorted
There are hot spots in bearing surface
Bearing has damage to the tab
Inspect thrust bearing flanges for damage. If damaged, replace thrust bearing.
Inspect main bearing bores in the block for cracks, chips, distortion, thread damage, or other damage. Replace cylinder
block if there is bearing bore damage.
Inspect and measure crankshaft main bearing journals (refer to Removal).
Inspect main bearing caps for cracks, fretted or chipped mating surfaces, distortion or damaged ring dowels.
Replace a damaged bearing cap.
Replace both bearing cap ring dowels if one or both are damaged.