Contents: Removal ⬇ Installation ⬇
Note: When installing the pan, replace the gaskets and use sealant on the oil pump and rear main bearing.
Removal
1. If the engine is in the vehicle, proceed as described below, otherwise proceed to step 9.
2. Disconnect the negative cable from the battery.
3. Drain the engine oil, following the instructions Section 1, then install and tighten the drain plug.
4. Apply the handbrake, then jack up the front of the vehicle and support it on axle stands.
5. Remove the front section of the exhaust system as described in Section 4C.
(The source is on the online website: OpelBook)
6. Where applicable, disconnect the electrical wiring from the oil level sensor.
7. Unscrew the mounting bolts and remove the engine-to-transmission locking plate from the clutch housing.
8. Unscrew the mounting bolts, remove the sump. Note that on most models the sump deflector can be moved far away from the cylinder block together with the sump, but it cannot be removed until the oil pump inlet pipe is removed.
9. On 1.6, 1.8 and 2.0 liter models, to remove the sump deflector, you need to unscrew the bracket that secures the oil pump inlet pipe to the cylinder block. Then the deflector can be removed through the inlet pipe. On C16NZ2, 1.8 and 2.0 liter models, use a screwdriver to remove the rubber gasket from the sump deflector.
10. If required, the oil pump intake pipe can be removed by unscrewing one bolt securing the bracket to the cylinder block. Then unscrew the two bolts securing the end of the pipe to the oil pump. Remove the O-ring.
11. Clean the mating surfaces of the cylinder block, deflector (where it is applied) and the tray from the old gasket and sealant.
Installation
12. Apply sealant (Opel #90485251 or equivalent) to the joint between the oil pump and the cylinder block, and between the rear main bearing cap and the cylinder block (see illustrations).


13. On C16 NZ2, 1.8 2.0 litre models, position the new rubber gasket over the sump deflector flange; make sure it is placed correctly (see illustration).

14. On 1.6, 1.8 and 2.0 liter models, install the oil pan deflector in the cylinder block, positioning it through the oil pump intake pipe.
15. If the pickup tube has been removed, install it onto the oil pump using a new O-ring and tighten the bolts to the specified torque Specifications (see illustrations).


16. Where applicable, install the bracket securing the intake pipe to the cylinder block; make sure it goes through the appropriate hole in the under-deck deflector, if any (see illustration).

17. Coat the oil pan mounting bolts with thread locking compound (Opel #90167347), then install under the oil pan and tighten the bolts to the specified tightening torque Specifications (see illustrations).


18. If the engine is in the car, further installation is carried out in the reverse order of removal. Then install the front section of the exhaust system, following Section 4C. Finally, fill the engine with oil as described in Section 1.

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