Inspection
- Check crankshaft main journal diameters.
- Diameters should be within tolerances. Replace crankshaft if outside tolerance.
- Determine appropriate main bearing shells to be fitted from size selection and type tables in general data.
- Determine main bearing thickness by color code on edge of bearing.
- Crankshaft big-end journal diameters: Check crankshaft big-end journal diameters; replace crankshaft if outside tolerance.
- Determine big-end bearing thickness by color code on edge of bearing.
- Big-end bearings - selection: Record big-end journal code letters, located on the rear crankshaft web. The first letter, reading from left to right, relates to the number one big-end journal. (Scheme 186)
- Record big-end bearing bore numbers, this will be 7, 8 or 9 located on the connecting rod bearing cap. (Scheme 187)
- Big-end bearings selection: Select the required bearing shells from general data.
- Ensure all bolt holes are clean and dry. Remove all traces of thread locking material from oil pick-up strainer bolt hole and threads of retaining bolt. CAUTION: Do not use a tap.
- Ensure bearing ladder locating dowels are fitted and dowel holes in bearing ladder are clean and dry.
- Check coolant stub pipe in cylinder block for signs of leakage and corrosion, replace as necessary. Apply sealant, Part No. STC 50554 to seal replacement pipe to cylinder block.
- Clean main bearing shell recesses in cylinder block.
- Clean crankshaft main bearing and big end bearing journals. Clean bearing shell locations in connecting rods and caps.
- Fit selected main bearing shells, grooved into cylinder block and plain into bearing ladder.
- Fit new thrust washers to cylinder block.
- Position Dial Test Indicator (DTI) gauge stylus on end of crankshaft as illustrated, push crankshaft away from DTI, zero DTI gauge, push crankshaft in the opposite direction and note reading on gauge. (Scheme 188) CAUTION: If end-float exceeds limits given, crankshaft must be replaced.
