Table of contents: Removal ↓ Installation ↓
Removal
1. As described in the chapter 2A, 2B, 5B or 9 do the following (as needed). If the engine is removed from the vehicle, some operations can be skipped.
- a) Remove the timing belt.
- b) Remove the auxiliary shaft sprocket.
- c) Remove the ignition distributor on the ADP engine.
- d) On diesel engines, remove the vacuum pump.
2. On ADR, AFY, AEB engines, remove the mounting fork, bearing, and oil pump drive gear from the cylinder block. The gear can be removed with a magnet. Remember the way the gear is installed, it may have to be installed back, if it is installed "upside down", it can cause engine damage (fig. 9.2, a-c).
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3. The axial clearance of the shaft must be measured before removing it. Attach a dial indicator to the block, resting the dial indicator foot on the end of the shaft, push the shaft into the engine, reset the indicator and pull the shaft out. Record the clearance value and compare it with the data given in Specifications - if the gap is large, the shaft must be replaced (Fig. 9.3).
4. Loosen the mounting bolts and remove the intermediate shaft flange. Remove the sealing ring and press out the oil seal (Fig. 9.4).
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5. Remove the shaft from the block and inspect the drive gear at the rear end of the shaft - if the gear has damaged teeth, the shaft must be replaced.
6. If the seal is leaking, check for damage to the working surface of the shaft.
Installation
7. Generously lubricate the shaft with clean engine oil, insert it into the block, aligning its journals with the support bearings.
8. Press a new seal into the housing (flange), install a new sealing ring on the inner surface of the flange.
9. Lubricate the inner working lips of the seal with clean engine oil and place the flange and seal on the shaft. Make sure the sealing ring is seated correctly, tighten the mounting bolts and tighten them to the specified torque. Check that the shaft rotates freely.
10. On ADR. AFY, AEB, AJL engines, insert the drive gear into the hole in the rear of the cylinder block and align its splines with the splines on the oil pump shaft. Make sure the gear is installed correctly (it cannot be installed upside down). Install the bearing together with the new seal and secure it with a fork and bolt, tightening the bolt to the specified torque.
11. As described in the chapter 2A, 2B, 5B or 9, do the following:
- a) Install a vacuum pump on diesel engines.
- b) Install the sprocket on the auxiliary shaft and tighten the central bolt of its fastening to the specified torque.
- c) Install the timing belt.
- d) Install the ignition distributor on ADP engines.