DOHC Engine Seals and Gaskets
1 - carburetor, 2 - cylinder head cover, 3 - intake manifold, 4 - intake manifold gasket, 5 - cylinder head, 6 - exhaust manifold gasket, 7 - exhaust manifold, 8 - exhaust pipe gasket, 9 - crankshaft rear seal ring, 10 - crankshaft rear seal ring cover, 11 - gasket, 12 - cylinder block, 13 - oil pickup pipe gasket, 14 - oil pickup, 15 - oil pan, 16 - oil pan gasket, 17 - water pump seal ring, 18 - water pump, 19 - crankshaft front seal ring, 20 - front cylinder block cover, 21 - gasket, 22 - oil pump, 23 - gasket, 24 - cylinder head gasket, 25 – technological plug, 26 – gasket, 27 – front head cover, 28 – camshaft sealing ring
Removal the DOHC engine oil pump
1 – chain tensioner, 2 – pump drive chain, 3 – pump sprocket mounting bolt, 4 – pump sprocket, 5 – oil pump, 6 – oil pump mounting bolt to cylinder block
Crank mechanism
1 - crankshaft, 2 - woodruff key, 3 - front crankshaft sealing ring, 4 - crankshaft main bearing cap fastening bolt, 5 - crankshaft main cap, 6 - main bearing shells, 7 - rear crankshaft sealing ring, 8 - thrust half rings, 9 - toothed ring, 10 - connecting rod cap, 11 - connecting rod bearing shells, 12 - connecting rod, 13 - piston pin, 14 - piston rings, 15 - piston
If possible, install the engine on a stand; if not, install it in such a way that the engine cannot be damaged when loosening tightly tightened nuts and bolts.
When disassembling, it is very important to maintain cleanliness to prevent contamination of the disassembled components. Before disassembling, clean the outside of the engine with kerosene or, if very dirty, with solvent.
When the parts are removed from the engine, wash them in kerosene. Never immerse parts with internal lubrication channels in kerosene; such parts should be thoroughly wiped with a cloth soaked in kerosene, and the lubrication channels should be cleaned with a wire rope.
1. Drain the engine oil from the engine and remove the oil level indicator.
2. Unscrew the oil filter.
3. Unscrew the bolts securing the clutch pressure plate housing to the flywheel and remove it.
4. Remove the flywheel.
5. Remove the alternator drive belt.
6. Unscrew the long lower generator mounting bolt, then the upper bolt and remove the generator.
7. Unscrew the central bolt securing the drive belt tensioner mechanism and remove the tensioner mechanism.
8. Remove the cylinder head cover.
9. Remove the ignition distributor.
10. Remove the upper timing cover.
11. Turn the crankshaft in the direction of working rotation until it reaches the top dead center in the compression stroke of the piston of cylinder 1.
12. Loosen the crankshaft pulley mounting bolt. To prevent the crankshaft from turning when unscrewing the pulley, it is necessary to secure the flywheel by the teeth of the ring gear.
13. Partially unscrew the crankshaft pulley mounting bolt and use a puller to remove the pulley. The puller jaws should rest against the metal part of the pulley.
14. Unscrew the central bolt securing the drive belt tensioner mechanism and remove the tensioner mechanism.
15. Unscrew 11 mounting bolts and remove the lower timing cover. Remove the rubber seal.
16. Unscrew the bolt and remove the oil pump drive chain tensioner.
17. Unscrew the bolt securing the sprocket to the oil pump and remove the sprocket together with the chain.
18. Remove the upper chain guide.
19. Unscrew the two bolts securing the lower chain guide and remove it upwards.
20. Remove the retaining ring from the timing chain tensioner lever shaft and remove the tensioner lever.
21. Remove the timing chain tensioner lever axle using an M6x70 bolt and bushing.
22. Mark the camshaft sprockets and remove them.
23. Remove the sprocket and woodruff key from the crankshaft.
24. Remove the timing chain upwards.
Caution! To avoid collision of pistons and valves, do not turn the engine crankshaft when the timing chain is removed.
25. Remove the chain tensioner.
26. Remove the hydraulic chain tensioner plunger.
27. Unscrew the nuts and remove the camshaft mounting caps together with the oil supply pipe. The camshaft caps are marked for subsequent reinstallation in their places. If there is no marking, they must be marked before removing the caps.
28. Remove the camshafts from the cylinder head. There is a green mark on the camshaft that controls the exhaust valves. If there is no mark, mark the camshafts.
29. Remove the hydraulic valve lifters and place them in suitable containers with oil for future reinstallation.
30. Gradually and sequentially unscrew the 13 cylinder head mounting bolts in the reverse order of tightening.
Caution: Reusing the cylinder head bolts is not recommended.
31. Remove the cylinder head and place it on two wooden blocks to avoid damaging the valves.
32. Remove the cylinder head gasket and guide bushings.
33. Unscrew 4 bolts and remove the oil pump from the cylinder block.
34. Remove the oil pressure sensor and crankshaft position sensor.
35. Unscrew the bolts and nuts securing the oil pan and remove it.
36. Turn the engine over.
37. Remove the oil intake pipe and oil deflector.
38. Remove the rear crankshaft cover with the sealing ring.
39. Check for markings on the caps of the main and connecting rod bearings of the crankshaft. If they are missing, mark the bearings with a center punch or indelible pencil.
40. Unscrew the connecting rod bolts, remove their caps, remove the connecting rod bearings and remove the pistons together with the connecting rods from the cylinders.
41. Unscrew the main bearing cap bolts, remove the main bearing caps and take out the liners.
42. Remove the crankshaft from the cylinder block.
43. Remove the crankshaft thrust washers.
Information for this article was taken from the website (Fordbook.ru)