| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 8H-8581 | Feeler Gauge | 1 |
| B | 8T-5096 | Dial Indicator Group | 1 |
 | |
| Illustration 1 | g00996359 |
(1) Diameter of the piston pin
- Nominal value ... 30 mm (1.18 inch)
- Standard at assembly ... 29.994 to 30.000 mm (1.1809 to 1.1811 inch)
Clearance between the piston pin and the bore
- Standard at assembly ... 0.000 to 0.016 mm (0.0000 to 0.0006 inch)
- Service limit ... 0.050 mm (0.0020 inch)
Refer to table 2 for the outside diameters of the pistons.
| Item | Standard at Assembly | Service Limit |
| Standard | 93.955 to 93.985 mm (3.6990 to 3.7002 inch) |
93.770 mm (3.6917 inch) |
0.25 mm (0.0098 inch) oversize |
94.205 to 94.235 mm (3.7089 to 3.7100 inch) |
94.020 mm (3.7016 inch) |
0.50 mm (0.0197 inch) oversize |
94.455 to 94.485 mm (3.7187 to 3.7199 inch) |
94.270 mm (3.7114 inch) |
Maximum difference in weight of the piston per engine ... 0.005 kg (0.0110 lb)
 | |
| Illustration 2 | g01256915 |
Use Tooling (A) in order to measure the piston ring end gap.
- Standard at assembly ... 0.30 to 0.50 mm (0.0118 to 0.0197 inch)
- Service limit ... 1.50 mm (0.0591 inch)
 | |
| Illustration 3 | g01256914 |
Use Tooling (A) in order to measure the clearance between the piston groove and a new piston ring.
-
No. 1 ring
- Standard at assembly ... 0.07 to 0.11 mm (0.0028 to 0.0043 inch)
- Repair limit ... 0.200 mm (0.0079 inch)
-
No. 2 ring
- Standard at assembly ... 0.045 to 0.085 mm (0.0018 to 0.0033 inch)
- Repair limit ... 0.150 mm (0.0059 inch)
-
Oil ring
- Standard at assembly ... 0.025 to 0.065 mm (0.0010 to 0.0026 inch)
- Repair limit ... 0.150 mm (0.0059 inch)
 | |
| Illustration 4 | g01256913 |
Use Tooling (B) in order to measure the protrusion of the piston (2) .
-
Standard at Assembly
- Naturally aspirated engines ... −0.25 to 0.15 mm (−0.0098 to 0.0059 inch)
- Turbocharged engines ... 0.05 to 0.45 mm (0.0020 to 0.0177 inch)
Compressed thickness of cylinder head gasket ... 1.2 ± 0.05 mm (0.05 ± 0.002 inch)
 | |
| Illustration 5 | g00987977 |
(3) Piston from naturally aspirated engines
(4) Piston from turbocharged engines
(5) "WEIGHT" mark
(6) "MATCHING" mark
Note: Assemble the piston and the connecting rod with the "WEIGHT" mark on the piston and with the "MATCHING" mark on the rod on the same side.
 | |
| Illustration 6 | g00987981 |
(7) Camshaft side
(8) End gap of No. 1 compression ring
(9) End gap of No. 2 compression ring
(10) Side with the inlet valve
(11) End gap of oil ring
Apply engine oil to the piston rings. Refer to Illustration 6 for the assembled configuration of the ends of the piston rings.
Note: Install the piston with the "O" mark toward the front of the engine.