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Home >> Acura >> 2003 >> 3.2CL Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 3.2L V6 Engine >> Overhaul >> Piston Ring >> Removal

Piston Ring: Removal

  1. Remove the piston from the cylinder block. See CRANKSHAFT & PISTON (REMOVAL & INSTALLATION) .
  2. Using a ring expander (A), remove the old piston rings (B). See Fig 1.
    3. NOTE: If the piston is to be separated from the connecting rod, DO NOT install new rings yet.
  3. Clean all the ring grooves thoroughly with a squared-off broken ring or ring groove cleaner with a blade to fit the piston grooves. File down the blade if necessary. Top ring and second ring grooves are .05" (1.2 mm) wide, and the oil ring groove is .11" (2.8 mm) wide. DO NOT use a wire brush to clean the ring grooves, or cut the ring grooves deeper with the cleaning tool.
  4. Using a piston, push a new ring into the cylinder bore .6-.8" (15-20 mm) from the bottom. See Fig 2 and PISTON RING END-GAP  table.
  5. Measure the piston ring end-gap with a feeler gauge;
    • If the gap is too small, check to see if you have the proper rings for your engine.
    • If the gap is too large, recheck the cylinder bore diameter against the wear limits. See step  4 under BLOCK & PISTON INSPECTION.
    PISTON RING END-GAP

    Application Specification - In. (mm)
    Top Ring
    Standard (New) .008-.014 (.20-.35)
    Service Limit .024 (.60)
    Second Ring
    Standard (New) .016-.022 (.40-.55)
    Service Limit .028 (.70)
    Oil Ring
    Standard (New) .008-.028 (.20-.70)
    Service Limit .031 (.80)
    Fig 1: Removing/Installing Piston Ring
    G00294845Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 2: Measuring Piston Ring End Gap
    G00014497Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Install the rings. See Fig 3. The top ring (A) has a 1C mark (J32A1 engine) or 1D mark (J32A2 engine) and the 2nd ring (B) has a 2C mark. The manufacturing marks (C) must be facing upward.
  7. After installing a new set of rings, measure the ring-to-groove clearance. See Fig 4 and RING-TO-GROOVE CLEARANCE  table.
  8. Rotate the rings in their grooves to make sure they do not bind.
  9. Position the ring end gaps. See Fig 5.
Fig 3: Installing Top & 2nd Ring
G00298117Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 4: Measuring Ring-To-Groove Clearance
G00298118Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 5: Positioning Ring End Gaps
G00294848Courtesy of AMERICAN HONDA MOTOR CO., INC.
RING-TO-GROOVE CLEARANCE

Application Specification - In. (mm)
Top Ring Clearance
J32A1
Standard (New) .0014-.0024 (.035-.060)
Service Limit .005 (.13)
J32A2
Standard (New) .0022-.005 (.055-.080)
Service Limit .005 (.13)
Second Ring Clearance
Standard (New) .0012-.0022 (.030-.055)
Service Limit .005 (.13)
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