Engine Block: Diagnosis Honda Odyssey III

Inspection

Note. Inspect the piston, piston pin, and connecting rod when they are at room temperature.

Scheme 424

Scheme 425

Scheme 426

Scheme 427

1. Measure the diameter of the piston pin. Piston Pin Diameter Standard (New): 21.962-21.965 mm (0.8646-0.8648 in.) Service Limit: 21.954 mm (0.8643 in.)
2. Zero the dial indicator to the piston pin diameter.
3. Check the difference between the piston pin diameter and piston pin hole diameter on the piston. Piston Pin-to-Piston Clearance Standard (New): -0.0050 to +0.0010 mm (-0.00020 to +0.00004 in.) Service Limit: 0.004 mm (0.0002 in.)
4. Measure the piston pin-to-connecting rod clearance. Piston Pin-to-Connecting Rod Clearance Standard (New): 0.005-0.014 mm (0.0002-0.0006 in.) Service Limit: 0.019 mm (0.0007 in.)

Scheme 428

Scheme 429

Scheme 430

1. Install a piston pin snap ring (A) only on one side.
2. Coat the piston pin bore in the piston, the bore in the connecting rod, and the piston pin with new engine oil.
3. Heat the piston to about 158°F (70°C).
4. Assemble the piston (A) and connecting rod (B) with the embossed marks (C) on the same side. Install the piston pin (D).
5. Install the remaining snap ring.

Scheme 431

Scheme 432

Scheme 433

Scheme 434

Scheme 435

1. Remove the piston from the engine block (see «CRANKSHAFT AND PISTON REMOVAL»(ref-220940-S39187594552006022100000) ).
2. Using a ring expander (A), remove the old piston rings (B).
3. Clean all the ring grooves thoroughly with a squared-off broken ring, or a ring groove cleaner with a blade to fit the piston grooves. File down the blade, if necessary. The 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.
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 ). If the bore is over the service limit, the engine block must be rebored. Piston Ring End-Gap Top Ring: Standard (New): 0.20-0.35 mm (0.008-0.014 in.) Service Limit: 0.60 mm (0.024 in.) Second Ring: Standard (New): 0.40-0.55 mm (0.016-0.022 in.) Service Limit: 0.70 mm (0.028 in.) Oil Ring: Standard (New): 0.20-0.70 mm (0.008-0.028 in.) Service Limit: 0.80 mm (0.031 in.)
6. Install the rings (Scheme 433) 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.
7. After installing a new set of rings, measure the ring-to-groove clearance: Top Ring Clearance Standard (New): 0.055-0.080 mm (0.0022-0.0031 in.) Service Limit: 0.15 mm (0.006 in.) Second Ring Clearance Standard (New): 0.030-0.055 mm (0.0012-0.0022 in.) Service Limit: 0.13 mm (0.005 in.)
8. Rotate the rings in their grooves to make sure they do not bind.
9. Position the ring end gaps (Scheme 435)