2. Place the engine upside down.
3. Unscrew the main bearing bolts and remove the caps. Set them aside in a specific order so that they can be installed correctly later.
4. If they are difficult to remove, remove them together with the bearing shells. Wipe the bearing block surfaces and bearing caps with a soft, lint-free cloth. They should be free of dirt.
5. Clean the back surfaces of the new bearing shells and place one half of the bearing in the block seat. Place the other half of each bearing in the corresponding cover. Make sure that the projection of the bearing shell fits into the corresponding recess in the block or cover. The oil holes in the block should also match the oil holes in the shell. Do not hammer the bearing into the seat, do not tap or scratch its working surfaces. Do not use grease when installing the bearing.
6. The thrust bearing with flange is installed in the third cover and the third socket.
7. Clean the bearing surface in the block and the main bearing journals on the crankshaft with a clean, fine-fiber cloth. Check and clean the oil supply holes in the crankshaft, as dirt from there comes out through the new bearings.
8. Once you are sure that the crankshaft is completely clean, carefully place it in the bearings.
9. Before final installation of the crankshaft, check the oil clearance of the main bearings.
10. Roll several cylinders of a certain size from plasticizer (they should be slightly shorter than the width of the main bearings) and place one on each crankshaft main bearing journal, parallel to the journal axis (see figure).
11. Clean the working surfaces of the bearing caps, install the caps in their places (do not mix them up), so that the arrows point towards the front of the engine. Do not move the plasticizer.
12. Tighten the main bearing cap bolts to the specified torque value in three steps; in this case, start from the central main bearing and move alternately to the edges. Do not move the crankshaft during this operation.
13. Unscrew the bolts and carefully remove the main bearing caps. Lay them out in order. Do not touch the plasticizer, do not turn the crankshaft. If any of the caps does not come off, gently tap them on the sides with a soft-faced hammer.
14. Compare the width of the crumpled plasticizer strip on each neck with the scale printed on the box of plasticizer; you will get the value of the main bearing oil clearance (see the figure). Compare with the data in the specification and make sure that its value is correct.
15. If the clearance is not as specified, this may indicate that the bearing size is incorrect (and therefore different bearings will be required). Before purchasing different bearings, make sure that no dirt or oil gets into the bearings, caps or block when checking the clearances. If the plasticizer is wider at one end, this indicates that the journal may be tapered (see section 20).
16. Carefully scrape off any remaining plasticizer from the bearing journals and the working surfaces of the bearings. Do not hit or scratch the working surfaces.
17. Carefully remove the crankshaft from the engine. Clean the bearing contact surfaces in the block, then apply a thin, continuous layer of moly grease or special engine component grease to the bearing surfaces. Be sure to lubricate the working surfaces and the journal of the shaft under the thrust bearing.
18. Make sure the crankshaft journals are clean, then place it back into the engine block. Clean the bearing surfaces in the caps, then apply grease to them.
Install the covers in their places so that the arrows on them point towards the front of the engine. Remember that on V6 engines the rear cover is treated with a special sealant (Ford D6AZ - 19562 - A or similar), which is applied in a layer of 3.175 mm (1/8 inch) thickness to the contact line of the rear main bearing cap with the block.
Install the bolts (see figure).
19. Tighten all bolts except the third cover (from the thrust bearing) to the required tightening torque (start with the central ones, achieve the required tightening force in three steps).
Tighten the third cap bolts to 10-12 ft·lbs (13.56-16.27 N·m). To align the main bearing and crankshaft thrust surfaces, move the crankshaft back and forth while tapping it with a lead or bronze hammer. Retighten the main bearing bolts to the specified torque, starting with the third main and working toward the edges.
20. On manual transmission models, install a new pilot bearing at the end of the crankshaft (see Chapter 8).
21. Turn the crankshaft manually several times to detect possible binding.
22. At the last stage it is necessary to check the axial clearance of the crankshaft with a feeler gauge or indicator, a description of the check is given in section 19. If the crankshaft thrust surfaces are not worn or damaged and new bearings are installed, the axial clearance should be within normal limits.
23. For the oil gasket installation procedure, see section 13.
[This publication was borrowed from the website: FordBook.ru]