How to Replace the Piston Rings Opel Astra H

Remove

1. 1. Remove piston with con-rod
2. 2. Remove piston rings using piston ring pliers (1) • Remove oil carbon from groove with split piston ring, filed to a wedge-shape
3. 3. Measure piston ring gap • Tension piston ring in cylinder and measure gap with feeler gauge • Permissible ring gap: – Rectangular compression ring (2) : 0.20 to 0.40 mm – Tapered compression ring (3): 0.40 to 0.60 mm – Oil scraper ring (4): 0.25 to 0.75 mm

4. 4. Check piston ring vertical play with feeler gauge in piston ring groove. • Permissible vertical play – Rectangular compression ring (1): 0.04 - 0.08 mm – Tapered compression ring (2): 0.03 - 0.07 mm – Oil scraper ring (3): 0.03 - 0.13 mm

Install

5. 5. Install piston rings • Insert into pistons with piston ring wrench and "TOP" pointing upwards • Set piston ring gap – First piston ring (right-hand ring) in position (1) – Second piston ring (minute ring) in position (2) – Interim ring of oil scraper ring in position (3), steel band rings of oil scraper ring in position (4) and/or (5)

6. 6. Install piston with con-rod