All vehicles 1. Record the main bearing code found on the front of the engine block. 2. Record the main bearing code found on the back of the crankshaft. 3. Using the data recorded earlier and the Bearing Select Fit Chart, Standard Bearings Chart determine the required bearing grade for each main bearing. • Read the first letter of the engine block main bearing code and the first letter of the crankshaft main bearing code. • Read down the column below the engine block main bearing code letter, and across the row next to the crankshaft main bearing code letter, until the two intersect. This is the required bearing grade for the number one crankshaft main bearing. • As an example, if the engine block code letter is ‘‘F’’ and the crankshaft code letter is ‘‘D,’’ the correct bearing grade for this main bearing is ‘‘2.’’ • Repeat this process for the remaining four main bearings. 4. If oversize bearings are being used, use the procedure in the previous step and the Bearing Select Fit Chart, Oversize Bearing Chart to determine the required grade for each main bearing. NOTE: Before assembling the cylinder block, all sealing surfaces must be free from chips, dirt, paint and foreign material. Also, make sure the coolant and oil passages are clear. 5. Install the upper main bearings into the cylinder block and the lower main bearing into the crankshaft main bearing caps. Lubricate the main bearings with clean engine oil. 6. Install the crankshaft into the cylinder block. 7. CAUTION: Make sure the coated side of the thrust washer with the 5-mm wide oil grooves faces the crankshaft thrust surface. Push the crankshaft rearward and install the crankshaft thrust washer at the back of the No. 5 main boss. 8. Loosely install the main bearing caps and the bolts. 9. Push the crankshaft forward to seat the crankshaft thrust washer and hold the crankshaft in the forward position. 10. Tighten bolts 1-20 in sequence shown in four stages. • Stage 1: Tighten to 10 Nm (89 lb-in). • Stage 2: Tighten to 25 Nm (18 lb-ft). • Stage 3: Tighten to 40 Nm (30 lb-ft). • Stage 4: Tighten an additional 90 degrees.
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