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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Mechanical - 1.8L (LKN)) >> Repair Instructions - Off Vehicle >> Piston, Connecting Rod and Bearing Cleaning and Inspection >> Piston And Connecting Rod Measurement Procedure >> Piston Ring Clearance

Piston Ring Clearance

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  1. Install the piston rings to the cylinder as shown (1) and measure the piston ring end gap. Compare the measurements with those provided below:
    Fig 1: Measuring Piston Ring End Clearance
    GM2189596Courtesy of GENERAL MOTORS COMPANY
    • The upper compression ring end gap should be 0.20 - 0.35 mm (0.0079 - 0.0138 in).
    • The lower compression ring end gap should be 0.40 - 0.50 mm (0.0155-0.0197 in).
    • The oil ring end gap should be 0.20 - 0.90 mm (0.0079 - 0.0354 in).
  2. If the clearance is greater than the provided specifications, the piston rings must be replaced.
  3. Measure the piston ring side clearance as shown (1). Compare the measurements with those provided below:
    Fig 2: Measuring Piston Ring Side Clearance
    GM2189597Courtesy of GENERAL MOTORS COMPANY
    • The upper compression ring side clearance should be 0.075 - 0.105 mm (0.00295 - 0.0041 in).
    • The lower compression ring side clearance should be 0.025 - 0.070 mm (0.00098 - 0.00276 in).
    • The oil ring side clearance should be 0.060 - 0.200 mm (0.00236 - 0.00787 in).
  4. If the clearance is greater than the provided specifications, replace the piston rings.
  5. If the clearance is still to great, replace the pistons.
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