Piston and Rings Replace Opel Antara I

Piston and Rings Replace

Tools Required

KM-470-B Angular Torque Gauge

EN-48249 Piston Ring Compressor

Disassemble

1. Remove the engine block. Refer to Engine Block Replace .
2. Mark and confirm the connecting rod cap position sequence.
3. Remove the connecting rod caps and bolts.

4. Remove the piston assembly

Caution: Use care when handling the piston. Worn piston rings are sharp and may cause injury.

5. Using a piston ring expander, remove the piston rings from the piston.

Inspect

1. Measure the piston ring gap using a feeler gauge For engine specifications. Refer to Engine Specifications .

2. If the piston ring gap is out of specification, replace the piston ring.

3. Measure the piston ring side clearance using a feeler guage. For engine specifications. Refer to Engine Specifications .

4. If the piston ring groove clearance is out of specification, replace the piston and rings.

5. Inspect the bearing bore for concentricity and alignment using a cylinder bore check gauge. Refer to Engine Specifications . If the bearing bore is beyond the specifications, replace the engine block.

6. Inspect the engine block cylinder bore for wear, runout, ridging and taper using a bore gauge. Refer to Engine Specifications .

7. Install the connecting rod to the crankshaft

8. Inspect the connecting rod end play. Refer to Engine Specifications .

Assembly

Caution: Use care when handling the piston. Worn piston rings are sharp and may cause injury.

1. Using a piston ring expander, install the piston rings to the piston.

Important: Check and confirm the piston assembly sequence

2. Lubricate the piston rings, cylinder bore surface and EN-48249 inner surface with clean engine oil.
3. Insert the piston assembly in the cylinder using piston ring compressor EN-48249.

Important: Check and confirm the connecting rod cap bearing surface. If damaged or dirty, clean or replace.

4. Lubricate the crankshaft big ends with clean engine oil.
5. Install the connecting rod caps and bolts. Tighten Tighten the connecting rod bearing cap bolts to 25 N•m (18.4 lb-ft). Using the angular torque gauge KM-470-B, tighten the connecting cap bolts another 90 degrees.
6. Install the engine block. Refer to Engine Block Replace .