Removal
1. Remove the timing belt and crankshaft timing gear, refer to Sections Removal, inspection and installation of the toothed drive belt and Removal, inspection and installation of the drive belt toothed wheel and tensioner mechanism.
2. Remove the pan, refer to Section Removal and installation the oil pan.
3. On the E7J engine, remove the woodruff key (where is it installed) from a groove in the crankshaft.
4. Unscrew the oil seal housing from the drive belt side from the cylinder block (refer to the accompanying illustration).
5a. To hold the gear, insert a screwdriver into one of the holes in it (refer to the illustrations).
5b. Remove the bolts securing the gear wheel to the oil pump hub.
6. Remove the gear from the oil pump.
7. Remove the oil seal spacer gasket (refer to the illustrations).
8. Remove the drive sprocket from the crankshaft, then release both sprockets from the chain (refer to the accompanying illustration).
Note: The timing gear is not keyed to the crankshaft, so the pulley bolt must be tightened correctly. This is very important, otherwise there is a chance that the oil pump will not function.
9a. Remove the two mounting bolts.
9b. Remove the oil pump. If there are two dowel pins, leave them in the cylinder block (refer to the illustrations).
Inspection
1. Loosen the mounting bolts.
2. Remove the pump cover and oil pick-up tube (refer to the illustrations).
3. Using a feeler gauge, check the clearance between each gear and the oil pump housing.
4. Also check the axial clearance of both gears (between the gears and the parting surface of the cover). If any gap is outside the tolerances given in Specifications, the oil pump needs to be replaced (refer to the illustrations).
5a. Press the end stop of the safety valve and remove the spring clip.
5b. Release the limiter and remove the spring and piston (refer to the illustrations).
6. Inspect the piston and cylinder walls of the relief valve for signs of wear and damage. If such damage is found, replace the oil pump.
7. If the components are suitable for further use, clean them and assemble them in the reverse order of disassembly. Before installing the cover, fill the pump with engine oil.
8. Inspect the chain for signs of wear and replace it if necessary. Also check the sprockets.
Installation
1. Wipe the contact surfaces of the oil pump and cylinder block.
2. Make sure there are two dowel pins in the cylinder block, then place the oil pump on them and insert the two mounting bolts. Tighten the bolts to the specified torque Specifications effort.
3. Place the chain on the oil pump sprocket.
4. Align the holes, then insert the bolts and tighten them to the specified Specifications with force, holding the sprocket with a screwdriver.
5. The drive belt side seal should be replaced each time the housing is removed. Note the correct orientation of the old seal, then pry it out with a screwdriver and wipe the bearing surface. Grease the outer edge of the new seal and position it on the housing, closed side out. Place the housing on a block of wood, then use a socket or metal pipe to hammer the seal into place.
6. Clean the sealant from the mating surfaces of the oil seal housing and the cylinder block. Apply a bead of sealant with a diameter of 0.6 - 1.0 mm to the housing, then install it on the cylinder block and tighten the bolts securely. The sealant should go around the inner edges of the bolt holes (refer to the accompanying illustration).
7. Lubricate the seal, then position the spacer on the end of the crankshaft. If the spacer is worn where it contacts the seal, it can be turned so that the new seal contacts the unworn area.
8. On the E7J engine, install the woodruff key (where is it installed) into the groove on the crankshaft.
9. Install the tray (refer to Section Removal and installation the oil pan).
10. Install the crankshaft timing gear and new timing belt, refer to Sections Removal, inspection and installation of the drive belt toothed wheel and tensioner mechanism and Removal, inspection and installation of the toothed drive belt.