FixVault
Home › Honda › 2000 › Odyssey EX › Repair and Diagnosis › Engine Mechanical › Mechanical › 3.5L V6 Engine › Engine Block › Piston Ring Replacement

Piston Ring Replacement

  1. Remove the piston from the cylinder block (see Crankshaft and Piston Removal  ).
  2. Using a ring expander (A), remove the old piston rings (B).
    Fig 1: Using Ring Expander
    G01505275Courtesy of AMERICAN HONDA MOTOR CO., INC.
  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 1.2 mm (0.05 in.) wide, and the oil ring groove is 2.8 mm (0.11 in.) wide. Do not use a wire brush to clean the ring grooves, or cut the ring grooves deeper with the cleaning tool.
    NOTE: If the piston is to be separated from the connecting rod, do not install new rings yet.
  4. Using a piston, push a new ring (A) into the cylinder bore 15-20 mm (0.6-0.8 in.) from the bottom.
    Fig 2: Pushing A New Ring Into Cylinder Bore
    G01505276Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Measure the piston ring end-gap (B) 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 on Block and Piston Inspection  ).
    • If the bore is over the service limit, the cylinder block must be rebored.

    Piston Ring End-Gap 

    Top Ring 

    1. Standard (New): 0.20-0.35 mm (0.008-0.014 in.)
    2. Service Limit: 0.60 mm (0.024 in.)

    Second Ring 

    1. Standard (New): 0.40-0.55 mm (0.016-0.022 in.)
    2. Service Limit: 0.70 mm (0.028 in.)

    Oil Ring 

    1. Standard (New): 0.20-0.70 mm (0.008-0.028 in.)
    2. Service Limit: 0.80 mm (0.031 in.)
  6. Install the rings as shown. The top ring (A) has a 1D mark and the second ring (B) has a 2C mark. The manufacturing marks (C) must be facing upward.
    Fig 3: Installing Rings (1 Of 2)
    G01505277Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 4: Installing Rings (2 Of 2)
    G01505278Courtesy of AMERICAN HONDA MOTOR CO., INC.
    Fig 5: Identifying Piston Ring Dimensions
    G01505279Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Top Ring (Standard) 

    1. A: 3.1 mm (0.12 in.)
    2. B: 1.2 mm (0.05 in.)

    Second Ring (Standard) 

    1. A: 3.4 mm (0.13 in.)
    2. B: 1.2 mm (0.05 in.)
  7. After installing a new set of rings, measure the ring-to-groove clearance.

    Top Ring Clearance 

    Standard (New) 

    1. 1999-2001 Models: 0.035-0.060 mm (0.0014-0.024 in.)
    2. 2002-2004 Models: 0.055-0.080 mm (0.0022-0.0031 in.)

    Service Limit: 0.13 mm (0.005 in.) 

    Second Ring Clearance 

    1. Standard (New): 0.030-0.055 mm(0.0012-0.0022 in.)
    2. Service Limit: 0.13 mm (0.005 in.)
    Fig 6: Measuring Ring-To-Groove Clearance
    G01505280Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Rotate the rings in their grooves to make sure they do not bind.
  9. Position the ring end gaps as shown
    Fig 7: Positioning Ring End Gaps
    G01505281Courtesy of AMERICAN HONDA MOTOR CO., INC.
About FixVault