Captiva |
||||||||
|
|
Note: DO NOT wire brush any part of the piston.
Warning: Refer to Safety Glasses Warning in the Preface section.
• | Cracked ring lands, skirts or pin bosses |
• | Ring grooves for nicks, burrs that may cause binding (5) |
• | Warped or worn ring lands (5) |
• | Piston pin retainer grooves for burrs (2) |
• | Eroded areas at the top of the piston (1) |
• | Scuffed or damaged skirt coating (4) |
• | Worn piston pin bores or worn piston pins (3) |
1.1. | Using an outside micrometer, measure the width of the piston at 30 mm (1.181 in) below the crown, top (1), at the thrust surfaces of the piston, perpendicular to the piston pin centerline. |
1.2. | Compare the measurement of the piston to its original cylinder by subtracting the piston width from the cylinder diameter. |
1.3. | Check your measurements with the Engine Mechanical Specifications : LF1 . |
1.4. | If the clearance obtained through measurement is greater than the provided specifications and the cylinder bores are within specification, replace the piston. |
2.1. | Piston pin bores and pins must be free of varnish or scuffing. |
2.2. | Use an outside micrometer to measure the piston pin in the piston contact areas. |
1.1. | Place the piston ring in the area of the bore where the piston ring will travel approximately 25 mm (1 in) down from the deck surface. Ensure that the ring is square with the cylinder bore by positioning the ring with the piston head. |
1.2. | Measure the end gap of the piston ring with feeler gauges . Refer to Engine Mechanical Specifications : LF1 . |
1.3. | If the clearance exceeds the provided specifications, the piston rings must be replaced. |
1.4. | Repeat the procedure for all the piston rings. |
2.1. | Roll the piston ring entirely around the piston ring groove. If any binding is caused by the ring groove, dress the groove with a fine file. If any binding is caused by a distorted piston ring, replace the ring. |
2.2. | With the piston ring on the piston, use feeler gauges to check clearance at multiple locations. |
2.3. | Compare the measurements with piston ring side clearance listed in the Engine Mechanical Specifications : LF1 . |
2.4. | If the clearance is greater than specifications, replace the piston rings. |
Warning: Refer to Safety Glasses Warning in the Preface section.
Note: DO NOT scrape the rod or rod cap.
Note: Measurements of all components should be taken with the components at normal room temperature.
Note: Measurements of all components should be taken with the components at normal room temperature.
© Copyright Chevrolet. All rights reserved |