94998A 4 Mercruiser COVER ASSEMBLY, TOP (BLACK)

Table 1
Required Tools
Tool Part Number Part Description Qty
A - Lifting Slings 2
B - 5mm Allen Socket 1
C 8T-5096 Dial Indicator 1
D - Magnetic Base and Stand 1
E - Straight Edge 1
F - Loctite 5900 Silicon Sealant 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Clean the crankshaft and inspect the crankshaft for wear and damage. Refer to Specifications, "Crankshaft" for more information. If necessary, replace the crankshaft or recondition the crankshaft.
If necessary, install the crankshaft gear. Refer to Disassembly and Assembly, "Crankshaft Gear - Remove and Install" for the correct procedure.
If necessary, install a new crankshaft timing ring. Refer to Disassembly and Assembly, "Crankshaft Timing Ring - Remove and Install" for the correct procedure.
Ensure that parent bores for bearing shells in the cylinder block are clean. Ensure that the threads for the main bearing bolts in the cylinder block are clean and free from damage.
Clean the main bearing shells and the thrust washers. Inspect the main bearing shells and the thrust washers for wear and damage. If necessary, replace the main bearing shells and the thrust washers.Note: If the main bearing shells are replaced, check whether oversize main bearing shells were previously installed. If the thrust washers are replaced, check whether oversize thrust washers were previously installed.
Illustration 1 g02443436
Install upper main bearing shells (8) to the cylinder block. Ensure that the locating tabs for the upper main bearing shells are seated in the slots in the cylinder block.Note: The upper main bearing shells have a groove and two oil holes.
Lubricate upper main bearing shells (8) with clean engine oil.
Illustration 2 g02441839
Attach Tooling (A) and a suitable lifting device to crankshaft (7). Lift crankshaft (7) into the cylinder block. The weight of the crankshaft is approximately 39 kg (86 lb).Note: Do not damage any of the finished surfaces on the crankshaft. Do not damage the main bearing shells.
Remove Tooling (A) after installation of the crankshaft to the cylinder block.
Illustration 3 g02442118
Lubricate thrust washers (7) with clean engine oil. Install thrust washers (7) to No. 3 main bearing in the cylinder block.Note: The grooves in the thrust washers must be located against the crankshaft. The thrust washers have a locating tab at one end. Ensure that the locating tabs are correctly seated in the cylinder block.
Illustration 4 g02441838
Install lower main bearing shells (5) into main bearing caps (4). Ensure that the locating tabs for the lower main bearing shells are correctly seated into the slots in the bearing caps.Note: The lower main bearing shells are plain bearings that do not have oil holes.
Ensure that the dowels (6) are correctly located.
Lubricate lower main bearing shells (5) and lubricate the journals of the crankshaft with clean engine oil. Install main bearing caps (4) to the cylinder block.Note: Ensure the correct location and orientation of main bearing caps (4). The locating tabs for the upper and the lower main bearing shells should be on the same side of the engine.
Illustration 5 g02441837
Lubricate the threads of bolts (3) with clean engine oil. Lubricate the underside of the heads of bolts (3) with clean engine oil.
Install bolts (3) to main bearing caps (4). Evenly tighten the bolts to pull the caps into position. Ensure that the caps are correctly seated.Note: Do not tap the main bearing caps into position as the bearing shells may be dislodged.
Tighten bolts (3) to a torque of 245 N m (181 lb ft).
Rotate the crankshaft to ensure that there is no binding.
Illustration 6 g03747103
Check the crankshaft end play. Push the crankshaft toward the front of the engine. Install Tooling (C) to the cylinder block and the rear face of the crankshaft. Push the crankshaft toward the rear of the engine. Use Tooling (C) and Tooling (D) to measure the crankshaft end play. The permissible crankshaft end play is 0.10 mm (0.004 inch) to 0.41 mm (0.016 inch).
If the crankshaft has been replaced or the crankshaft has been reconditioned, inspect the height of the piston above the cylinder block. Refer to System Operation, Testing and Adjusting, "Piston Height - Inspect" for more information.
If the crankshaft has not been replaced or the crankshaft has not been reconditioned, install the connecting rod bearings. Refer to Disassembly and Assembly, "Connecting Rod Bearings - Install" for the correct procedure.