Front oil seal
Attention! On engines with a plastic timing chain cover, the oil seal and cover are made in one piece and are changed together each time the cover is removed.
Removing the oil seal without dismantling the timing chain cover
1. Remove the front flywheel.
2. Pry with a large screwdriver and remove the gland from the cover (see photo).
3. Clean the gland hole. Lubricate and install a new oil seal in place with the open part of the oil seal facing inward.
4. Drive the oil seal in by hitting the head of the socket wrench with a hammer until the surface of the oil seal is flush with the adjacent surface (see photo). The head of the socket wrench must rest against the outer part of the stuffing box.
5. Lubricate the seal lips with engine oil and install the front flywheel.
Removing the oil seal from the removed timing chain cover
6. Knock out the old oil seal from the back of the cover (see photo).
7. Clean the area around the oil seal.
8. Grease and press in a new epiploon by blows of a hammer on a mandrel.
9. Install the timing chain cover.
Rear oil seal
7.4 liter engines up to 1990
10. The rear oil seal can be replaced without removing the engine from the vehicle. Remove the oil pan.
11. Turn away bolts and remove the bottom cover of the back radical bearing.
12. Open the rear main bearing cap seal.
13. Remove part of the stuffing box in the cylinder block by knocking it out with a hammer and brass beard and grabbing it with pliers (see photo). Take care not to damage the crankshaft journal.
14. Check up a condition of a neck of the crankshaft and a demountable plane of the block of cylinders, and also grooves under consolidation, remove agnails.
15. To install a new oil seal, you will need the tool shown in the photo.
16. Using a tool, insert one part of the oil seal into the main bearing cap with the oil seal lips facing forward. If the stuffing box has two working edges, then the edge with the spring should be facing forward (see photo). ends «halves» oil seal must be flush with the surface of the main bearing cap.
17. Route the narrow end of the tool so that it protects the rear back of the oil seal as it passes near the sharp edge of the cylinder block (see photo).
18. Lubricate the seal lips and grooves with molybdenum grease or engine oil; do not lubricate the seal ends! Insert the oil seal into the groove of the cylinder block using the tool (see photo).
Attention! Make sure the lip of the oil seal faces the front of the engine.
19. Insert the gland into place using a tool similar to «shoe horn». Rotate the crankshaft, if necessary, to seat the oil seal in the groove. When both ends of the seal end gland are flush with the cylinder block bed surface, remove the tool.
20. Lubricate the seal lip in the main journal cover with molybdenum grease or engine oil.
21. Carefully install the main bearing cover on the block, wrap and tighten the bolts with a torque of 12-14 Nm. With light hammer blows through the copper gasket, displace the crankshaft in both directions until it stops, then tighten the main cover bolts to the specified torque.
22. Install the oil pump and oil pan.
V6 and V8 engines 5.0 and 5.7 liters
23. All 5.0 and 5.7 liter V6 and V8 engines are equipped with a one-piece oil seal in the housing. The housing is bolted to the cylinder block. To replace this oil seal, you will need to remove the gearbox, clutch and flywheel or torque converter and drive plate (on automatic transmission). The procedure for removing the transmission is discussed in Chapter 7.
24. The gland can be removed from the body by prying with a screwdriver (see photo). The oil seal is pressed into the housing using a tool that is fixed in the threaded holes on the end of the crankshaft.
25. In the absence of adaptation an epiploon remove the oil pallet, turn away bolts of fastening of the case and remove the epiploon case and a lining. Press new seal into housing and install.
26. Remove the oil pan.
27. Measure the protrusion of the stuffing box Inserting a screwdriver into the grooves on the stuffing box housing, remove the stuffing box.
28. Clean the housing, lubricate the hole and the oil seal with engine oil Press the oil seal without distortion to the depth of its initial installation, see photo).
29. Install the gland housing in place, replacing the gasket.
30. Next, the assembly is performed in the reverse order.
7.4 liter engines since 1991
Attention! To replace the rear oil seal, it is recommended to use a special tool. In its absence, the stuffing box can be installed with a piece of pipe with a diameter slightly smaller than the outer diameter of the stuffing box.
31. This engine has a one-piece rear oil seal that is pressed into a hole in the rear main bearing cap and cylinder block. Remove the transmission, clutch and flywheel or torque converter drive plate.
32. Pry and remove the old packing, being careful not to damage the sealing surfaces.
33. Clear a place under a new epiploon. Lubricate the oil seal and press it in using a tool that is mounted on bolts screwed into the holes on the end of the crankshaft, or with a piece of pipe that should rest against the outer part of the oil seal. The seal lip must face the front of the engine. The gland is pressed in until it stops.