vauxhall Workshop Repair Guides

Vauxhall Workshop Service and Repair Manuals

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Piston, Replace > < Piston with Con-rod, Remove and Install

Astra G

Piston Rings, Remove and Install

  Remove

Remove piston with con-rod – see operation "Piston with Con-rod, Remove and Install".

Remove piston rings with piston ring pliers (1).

  Clean

Clean piston ring grooves – use ground-down side of old piston ring.

  Inspect

Check piston ring gap with feeler gauge by inserting piston ring at narrowest point of the cylinder bore.

Permissible ring gap:

Squared ring (2):

0.30 to 0.50 mm.

Tapered ring (3):

0.30 to 0.50 mm.

Oil scraper ring (4):

0.40 to 1.40 mm.

Object Number: 2392586 Size: DEFAULT

Check piston ring vertical play with feeler gauge in piston ring groove.

Permissible vertical play:

Squared ring (1):

0.02 to 0.04 mm

Tapered ring (2):

0.04 to 0.06 mm

Oil scraper ring (3):

0.01 to 0.03 mm.

  Install

Insert piston rings with piston ring pliers and identification "TOP" upwards in piston.

Piston ring positioning – piston rings (I) (rectangular and tapered compression ring) offset 120°. Oil scraper rings (II) – offset 25 to 50 mm to left and from right of gap in intermediate ring.

Install piston with con-rod – see operation "Piston with Con-rod, Remove and Install".

 Object Number: 2392587 Size: DEFAULT

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Piston, Replace > < Piston with Con-rod, Remove and Install