Crankshaft Rear Oil Seal and Housing Replacement. Chevrolet Metro 1999

For 1990-2009 cars

### Removal Procedure

1. Remove the transaxle from the vehicle. For automatic transaxle equipped vehicles refer to Transmission Replacement in Automatic Transaxle, or for manual transaxle equipped vehicles refer to Transmission Replacement in Manual Transaxle.
2. Remove the pressure plate assembly and the clutch disc. Refer to Clutch Assembly Replacement in Clutch.
3. Mark the flywheel-to-engine position.
4. Remove the following components from the crankshaft:

• | Six flywheel retaining bolts

• | The flywheel

• | The flywheel spacer

5. Remove the engine oil pan. Refer to Oil Pan Replacement in Engine Mechanical.
6. Remove the 5 bolts for the rear main seal housing.
7. Remove the rear main seal housing.
8. Using a hammer and a drift, carefully remove the rear main seal (1) from the rear main seal housing (2).
9. Carefully install the new rear main seal into the rear main seal housing with a hammer. Tap the rear main oil seal into place so that the end face is flush with the housing seal end face.

### Installation Procedure

1. Install the rear main seal housing onto the cylinder block with a new gasket.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Secure the rear main seal housing with five bolts.

Tighten
Tighten the 5 bolts for the rear main seal housing to 11 N·m (97 lb in).

3. After the rear main seal housing has been torqued to specifications, trim any excess gasket material from the oil pan rail.
4. Install the engine oil pan. Refer to Oil Pan Replacement in Engine Mechanical.
5. Install the flywheel spacer and the flywheel to the engine crankshaft.

Notice: Apply the proper amount of the sealant to the fastener when assembling this component. Excessive use of the sealant can prohibit the component from being assembled properly or allow the fastener to loosen. A component or fastener that is not assembled properly can loosen or fall off leading to extensive engine damage.

6. Apply GM P/N 12345493 or equivalent, to the flywheel retaining bolt threads.
7. Install the flywheel, and secure the flywheel with six flywheel retaining bolts.

Tighten

• | Automatic Transmission: Tighten the six flywheel retaining bolts to 95 N·m (69 lb ft).

• | Manual Transmission: Tighten the six flywheel retaining bolts to 78 N·m (57 lb ft).

8. Install the pressure plate assembly and the clutch disc, if the vehicle is equipped with a manual transaxle. Refer to Clutch Assembly Replacement in Clutch.
9. Install the transaxle to the vehicle. For vehicles that are equipped with an Transmission Replacement automatic transaxle, refer to in Automatic Transaxle.For vehicles that are equipped Transmission Replacement with a manual transaxle, refer to in Manual Transaxle.