SPECIFICATION
| Engine | Model | 2.5 L | ||||
|---|---|---|---|---|---|---|
| Cylinder arrangement | Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine | |||||
| Valve system mechanism | Belt driven, double overhead camshaft, 4-valve/cylinder | |||||
| Bore x Stroke | Mm (in) | 99.5 x 79.0 (3.92 x 3.11) | ||||
| Piston displacement | Cm 3 (cu in) | 2,457 (149.94) | ||||
| Compression ratio | 8.4 | |||||
| Compression pressure (at 200 - 300 RPM) | KPa (kg/cm 2 , psi) | 981 - 1,177 (10 - 12, 142 - 171) | ||||
| Number of piston rings | Pressure ring: 2, Oil ring: 1 | |||||
| Intake valve timing | Open | Max. retard | ATDC 5° | |||
| Min. advance | BTDC 35° | |||||
| Close | Max. retard | ABDC 65° | ||||
| Min. advance | ABDC 25° | |||||
| Exhaust valve timing | Open | BBDC 55° | ||||
| Close | ATDC 5° | |||||
| Valve clearance | Mm (in) | Inspection value | Intake | 0.20 +004 -0.06 (0.0079 +0.0016 -0.0024 ) | ||
| Exhaust | 0.35 ± 0.05 (0.0138 ± 0.0020) | |||||
| Adjustment value | Intake | 0.20 +0.01 -0.03 (0.0079 +0.0004 -0.0012 ) | ||||
| Exhaust | 0.35 ± 0.02 (0.0138 ± 0.0008) | |||||
| Idle speed ["P" or "N" range] | RPM | No load | 700 ± 100 | |||
| A/CON | 825 ± 100 | |||||
| Ignition order | 1 --> 3 --> 2 --> 4 | |||||
| Ignition timing | BTDC/RPM | 17° ± 10°/700 | ||||
GENERAL SPECIFICATION
Note. OS: Oversize US: Undersize
| Belt tension adjuster | Protrusion of adjuster rod | Mm (in) | 5.2 - 6.2 (0.205 - 0.244) | ||
|---|---|---|---|---|---|
| Camshaft | Bending limit | Mm (in) | 0.020 (0.0079) or less | ||
| Thrust clearance | Mm (in) | Standard | 0.068 - 0.116 (0.0027 - 0.0047) | ||
| Cam lobe height | Mm (in) | Intake | Standard | 46.55 - 46.65 (1.833 - 1.837) | |
| Exhaust | Standard | 46.75 - 46.85 (1.841 - 1.844) | |||
| Journal O.D. | Mm (in) | Standard | Front | 37.946 - 37.963 (1.4939 - 1.4946) | |
| Center rear | 29.946 - 29.963 (1.1790 - 1.1796) | ||||
| Journal clearance | Mm (in) | Standard | 0.037 - 0.072 (0.0015 - 0.0028) | ||
| Cylinder head | Surface warpage limit | Mm (in) | 0.035 (0.0014) | ||
| Grinding limit | Mm (in) | 0.3 (0.012) | |||
| Standard height | Mm (in) | 127.5 (5.02) | |||
| Valve seat | Seating angle | 90° | |||
| Contacting width | Mm (in) | Intake | Standard | 0.6 - 1.4 (0.024 - 0.055) | |
| Exhaust | Standard | 1.2 - 1.8 (0.047 - 0.071) | |||
| Valve guide | Inside diameter | Mm (in) | 6.000 - 6.012 (0.2362 - 0.2367) | ||
| Protrusion above head | Mm (in) | 15.8 - 16.2 (0.622 - 0.638) | |||
| Valve | Head edge thickness | Mm (in) | Intake | Standard | 1.0 - 1.4 (0.039 - 0.055) |
| Exhaust | Standard | 1.3 - 1.7 (0.051 - 0.067) | |||
| Stem outer diameter | Mm (in) | Intake | 5.955 - 5.970 (0.2344 - 0.2350) | ||
| Exhaust | 5.945 - 5.960 (0.2341 - 0.2346) | ||||
| Valve stem gap | Mm (in) | Standard | Intake | 0.030 - 0.057 (0.0012 - 0.0022) | |
| Exhaust | 0.040 - 0.067 (0.0016 - 0.0026) | ||||
| Overall length | Mm (in) | Intake | 104.4 (4.110) | ||
| Exhaust | 104.65 (4.1201) | ||||
| Valve spring | Free length | Mm (in) | 47.32 (1.863) | ||
| Squareness | 2.5°, 2.1 mm (0.083 in) or less | ||||
| Tension/spring height | N (kgf, lb)/mm (in) | Set | 205 - 235 (20.9 - 24.0, 46.1 - 52.8)/36.0 (1.417) | ||
| Lift | 426 - 490 (43.4 - 50.0, 95.8 - 110)/26.5 (1.043) | ||||
| Valve lifter | Outer diameter | Mm (in) | Standard | 34.959 - 34.975 (1.3763 - 1.3770) | |
| Inner diameter (cylinder head) | Mm (in) | Standard | 34.994 - 35.016 (1.3777 - 1.3786) | ||
| Valve lifter clearance | Mm (in) | Standard | 0.019 - 0.057 (0.0007 - 0.0022) | ||
| Cylinder block | Surface warpage limit (Mating surface with cylinder head) | Mm (in) | 0.025 (0.0098) | ||
| Grinding limit | Mm (in) | 0.1 (0.004) | |||
| Standard height | Mm (in) | 201.0 (7.91) | |||
| Cylinder inner diameter | Mm (in) | Standard | A | 99.505 - 99.515 (3.9175 - 3.9179) | |
| B | 99.495 - 99.505 (3.9171 - 3.9175) | ||||
| Taper | Mm (in) | Standard | 0.015 (0.0006) | ||
| Out-of-roundness | Mm (in) | Standard | 0.010 (0.0004) | ||
| Piston clearance | Mm (in) | Standard | 0.010 - 0.010 (-0.00039 - 0.00039) | ||
| Cylinder inner diameter boring limit (diameter) | Mm (in) | To 100.005 (3.9372) | |||
| Piston | Outer diameter | Mm (in) | Standard | A | 99.505 - 99.515 (3.9175 - 3.9179) |
| B | 99.495 - 99.505 (3.9171 - 3.9175) | ||||
| 0.25 (0.0098) OS | 99.745 - 99.765 (3.9270 - 3.9278) | ||||
| 0.50 (0.0197) OS | 99.995 - 100.015 (3.9368 - 3.9376) | ||||
| Piston pin | Standard clearance between piston and piston pin | Mm (in) | Standard | 0.004 - 0.008 (0.0002 - 0.0003) | |
| Degree of fit | Piston pin must be fitted into position with thumb at 20°C (68°F). | ||||
| Piston ring | Ring closed gap | Mm (in) | Top ring | Standard | 0.20 - 0.25 (0.0079 - 0.0098) |
| Second ring | Standard | 0.37 - 0.52 (0.015 - 0.0203) | |||
| Oil ring | Standard | 0.20 - 0.50 (0.0079 - 0.0197) | |||
| Ring groove gap | Mm (in) | Top ring | Standard | 0.040 - 0.080 (0.0016 - 0.0031) | |
| Second ring | Standard | 0.030 - 0.070 (0.0012 - 0.0028) | |||
| Connecting rod | Bend or twist per 100 mm (3.94 in) in length | Mm (in) | Limit | 0.1 (0.0039) | |
| Thrust clearance | Mm (in) | Standard | 0.070 - 0.330 (0.0028 - 0.0130) | ||
| Bearing of large end | Oil clearance | Mm (in) | Standard | 0.017 - 0.045 (0.0007 - 0.0018) | |
| Bearing size (Thickness at center) | Mm (in) | Standard | 1.490 - 1.502 (0.0587 - 0.0591) | ||
| 0.03 (0.0012) US | 1.504 - 1.512 (0.0592 - 0.0595) | ||||
| 0.05 (0.0020) US | 1.514 - 1.522 (0.0596 - 0.0599) | ||||
| 0.25 (0.0098) US | 1.614 - 1.622 (0.0635 - 0.0639) | ||||
| Bushing of small end | Clearance between piston pin and bushing | Mm (in) | Standard | 0 - 0.022 (0 - 0.0009) | |
| Crankshaft | Bending limit | Mm (in) | 0.035 (0.0014) | ||
| Crank pin | Out-of-roundness | Mm (in) | 0.003 (0.0001) | ||
| Cylindricality | Mm (in) | 0.004 (0.0002) | |||
| Grinding limit (dia.) | Mm (in) | To 51.750 (2.0374) | |||
| Crank journal | Out-of-roundness | Mm (in) | 0.005 (0.0002) | ||
| Cylindricality | Mm (in) | 0.006 (0.0002) | |||
| Grinding limit (dia.) | Mm (in) | To 59.758 (2.3527) | |||
| Crank pin outer diameter | Mm (in) | Standard | 51.984 - 52.000 (2.0466 - 2.0472) | ||
| 0.03 (0.0012) US | 51.954 - 51.970 (2.0454 - 2.0461) | ||||
| 0.05 (0.0020) US | 51.934 - 51.950 (2.0447 - 2.0453) | ||||
| 0.25 (0.0098) US | 51.734 - 51.750 (2.0368 - 2.0374) | ||||
| Crank journal outer diameter | Mm (in) | Standard | 59.992 - 60.008 (2.3619 - 2.3625) | ||
| 0.03 (0.0012) US | 59.962 - 59.978 (2.3607 - 2.3613) | ||||
| 0.05 (0.0020) US | 59.942 - 59.958 (2.3599 - 2.3605) | ||||
| 0.25 (0.0098) US | 59.742 - 59.758 (2.3520 - 2.3527) | ||||
| Thrust clearance | Mm (in) | Standard | 0.030 - 0.115 (0.0012 - 0.0045) | ||
| Oil clearance | Mm (in) | 0.010 - 0.030 (0.0004 - 0.0012) | |||
| Main bearing | Bearing size (Thickness at center) mm (in) | #1, #3 | Standard | 1.998 - 2.011 (0.0787 - 0.0792) | |
| 0.03 (0.0012) US | 2.017 - 2.020 (0.0794 - 0.0795) | ||||
| 0.05 (0.0020) US | 2.027 - 2.030 (0.0798 - 0.0799) | ||||
| 0.25 (0.0098) US | 2.127 - 2.130 (0.0837 - 0.0839) | ||||
| #2, #4, #5 | Standard | 2.000 - 2.013 (0.0787 - 0.0793) | |||
| 0.03 (0.0012) US | 2.019 - 2.022 (0.0795 - 0.0796) | ||||
| 0.05 (0.0020) US | 2.029 - 2.032 (0.0799 - 0.0800) | ||||
| 0.25 (0.0098) US | 2.129 - 2.132 (0.0838 - 0.0839) | ||||
GENERAL SPECIFICATION
Scheme 292
Scheme 293
Scheme 294
Scheme 295
Scheme 296
Scheme 297
Refer to "Cylinder Head" for removal and installation procedures of the intake and exhaust valves. Refer to REMOVAL, Cylinder Head. Refer to INSTALLATION, Cylinder Head.
Refer to "Cylinder Block" for removal and installation procedures of pistons. Refer to REMOVAL, Cylinder Block. Refer to INSTALLATION, Cylinder Block.
Refer to "Cylinder Block" for removal and installation procedures of connecting rod. Refer to REMOVAL, Cylinder Block. Refer to INSTALLATION, Cylinder Block.
Refer to "Cylinder Block" for removal and installation procedures of the crankshaft. Refer to REMOVAL, Cylinder Block. Refer to INSTALLATION, Cylinder Block.
See also:
• READ CURRENT DATA FOR ENGINE (NORMAL MODE)