Acura TSX / Honda Accord CL. Manual — part 457

the cylinders and remeasure the bores.

2. Hone the cylinder bores with honing oil and a fine (400 grit) stone in 60 degree cross-hatch pattern (A).

Use only a rigid hone With 400 grit or finer stone such as Sunnen, Ammco, or equivalent. Do not use
stones that are worn or broken.

Fig. 211: Identifying 60 Degree Cross-Hatch Hone Pattern

3. When honing is complete, thoroughly clean the engine block of all metal particles. Wash the cylinder

bores with hot soapy water, then dry and oil them immediately to prevent rusting. Never use solvent, it
will only redistribute the grit on the cylinder walls.

4. If scoring or scratches are still present in the cylinder bores after honing to the service limit, rebore the

cylinder block. Some light vertical scoring and scratching is acceptable if it is not deep enough to catch
your fingernail and does not run the full length of the bore.

PISTON, PIN & CONNECTING ROD REPLACEMENT

Disassembly

1. Remove the piston from the cylinder block (see CRANKSHAFT & PISTON REMOVAL ).

2. Apply engine oil to the piston pin snap rings (A), and turn them in the ring grooves until the end gaps are

lined up with the cutouts in the piston pin bores (B).

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 212: Turning Piston Pin Snap Rings In The Ring Grooves Until The End Gaps Are Lined Up
With The Cutouts In The Piston Pin Bores

3. Remove both snap rings (A). Start at the cutout in the piston pin bore. Remove the snap rings carefully so

they do not go flying or get lost. Wear eye protection.

NOTE:

Take care not to damage the ring grooves.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 213: Removing The Snap Rings

4. Heat the piston and connecting rod assembly to about 158°F (70°C), then remove the piston pin.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 214: Heating The Piston & Connecting Rod Assembly

Inspection

1. Measure the diameter of the piston pin.

Piston Pin Diameter:

Standard (New): 21.961-21.965 mm (0.8646-0.8648 in.)

Service Limit: 21.953 mm (0.8643 in.)

NOTE:

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

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX