Engine - Cylinder De-Glazing And Ring Replacement
Group: 13Number: 01-01
Date: July 23, 2001
Subject:
Engine Cylinder Wall De-Glazing and Piston Ring Replacement
Model(s):
All with 2.0 L AEG Engine 1999-->
Condition
Engine requires piston ring replacement.
Service
See Repair Manual, Repair Group 13, for detailed information.
For correct piston ring sealing during the engine rebuilding process:
- De-glaze cylinder walls, using a 250-350 RPM drill with a flexible 83 mm diameter, 320 grit de-glazing ball-hone (recommended).
- Lubricate cylinder walls with 10W-30 engine oil or honing oil, as recommended by the de-glazing ball-hone manufacturer.
De-glazing time should be approximately 20-45 seconds per cylinder.
Notes:
Cross-hatch lines should intersect at an angle of approximately 45 degrees (see illustration):
^ Too steep an angle will allow oil migration into the cylinder, resulting in a thin oil film, which can cause ring and cylinder scuffing.
^ Too flat an angle can hold excess oil, causing thicker oil films, on which the piston ring rides up or "hydroplanes".
The cross-hatch angle on the cylinder wall is determined by the vertical speed of the ball-hone:
^ Too slow a vertical ball-hone speed will result in too flat a cross-hatch angle; if the vertical speed of the ball-hone is too rapid, the cross-hatch angle will be too steep.
CAUTION!
Do not over-hone, de-glaze without lubricant, or exceed recommended RPM!
Note:
^ Cylinder cleaning is the single most critical step after de-glazing of the cylinder walls.
^ Pistons, rings, and cylinder bores will tolerate slight variations in roughness, cross-hatch angles, etc., but engine components will not tolerate honing stone residue!
- After de-glazing, clean cylinders thoroughly with warm or hot water and detergent.
- Rinse with hot water and lightly oil cylinder walls to prevent rust.
Use the replacement parts table shown, as needed.
CAUTION!
Part numbers are for reference only. Always check with your Parts Dept. for the latest parts information.
For vehicles within the New Vehicle Limited Warranty, use the table as shown.