Section 8 (Engine Mechanical System (2.5L)): General Description: Specification
WARNING: This page is about a different variant/trim than selected.
| 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) | ||||
| Displacement cm3 (cu in) | 2, 457 (150) | ||||
| Compression ratio | 8.2 | ||||
| Compression pressure (at 200 - 300 r/min) kPa (kg/cm2 , psi) | Standard | 981 - 1, 177 (10 - 12, 142 - 171) | |||
| Number of piston rings | Compression ring: 2 Oil ring: 1 | ||||
| Intake valve timing | Open | Max. retard | ATDC 5° | ||
| Min. advance | BTDC 47° | ||||
| Close | Max. retard | ABDC 65° | |||
| Min. advance | ABDC 13° | ||||
| Exhaust valve timing | Open | Max. retard | BBDC 28° | ||
| Min. advance | BBDC 72° | ||||
| Close | Max. retard | ATDC 32° | |||
| Min. advance | BTDC 12° | ||||
| Valve clearance mm (in) | Inspection value | Intake | 0.20+0.04-0.06 (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 (Gear shift lever is in neutral) r/min | No load | Standard | 700±100 | ||
| A/C ON | Standard | 750±100 | |||
| Ignition order | 1 → 3 → 2 → 4 | ||||
| Ignition timing BTDC/{r/min} | Standard | 15°±10°/700 | |||
NOTE:
OS: Oversize US: Undersize
| Belt tension adjuster | Adjuster rod protrusion amount mm (in) | 5.2 - 6.2 (0.2047 - 0.2441) | |||
| Camshaft | Bending limit mm (in) | 0.020 (0.0008) | |||
| Cam lobe height mm (in) | Intake | Standard | 46.55 - 46.65 (1.8327 - 1.8366) | ||
| Exhaust | Standard | 46.75 - 46.85 (1.8405 - 1.8445) | |||
| Cam base circle diameter mm (in) | Standard | 37.0 (1.4567) | |||
| Journal O.D. mm (in) | Front | Standard | 37.946 - 37.963 (1.4939 - 1.4946) | ||
| Center, rear | Standard | 29.946 - 29.963 (1.1790 - 1.1796) | |||
| Oil clearance mm (in) | Standard | 0.037 - 0.072 (0.0015 - 0.0028) | |||
| Thrust clearance mm (in) | Standard | 0.068 - 0.116 (0.0027 - 0.0047) | |||
| Cylinder head | Warping limit (Mating surface with cylinder block) mm (in) | 0.035 (0.0014) | |||
| Grinding limit mm (in) | 0.3 (0.0118) | ||||
| Standard height mm (in) | 127.5 (5.0197) | ||||
| Valve seat | Seating angle between valve and valve seat | 90° | |||
| Contacting width between valve and valve seat mm (in) | Intake | Standard | 0.6 - 1.4 (0.0236 - 0.0551) | ||
| Exhaust | Standard | 1.2 - 1.8 (0.0472 - 0.0709) | |||
| Valve guide | Clearance between the valve guide and valve stem mm (in) | Intake | Standard | 0.030 - 0.057 (0.0012 - 0.0022) | |
| Exhaust | Standard | 0.040 - 0.067 (0.0016 - 0.0026) | |||
| Inside diameter mm (in) | 6.000 - 6.012 (0.2362 - 0.2367) | ||||
| Valve stem outer diameters mm (in) | Intake | 5.955 - 5.970 (0.2344 - 0.2350) | |||
| Exhaust | 5.945 - 5.960 (0.2341 - 0.2346) | ||||
| Valve guide protrusion amount mm (in) | 15.8 - 16.2 (0.6220 - 0.6378) | ||||
| Valve | Head edge thickness mm (in) | Intake | Standard | 1.0 - 1.4 (0.0394 - 0.0551) | |
| Exhaust | Standard | 1.3 - 1.7 (0.0512 - 0.0669) | |||
| Overall length mm (in) | Intake | 104.4 (4.1102) | |||
| Exhaust | 104.65 (4.1201) | ||||
| Valve spring | Free length (reference) mm (in) | 53.48 (2.1055) | |||
| Tension/spring height N (kgf, lb)/mm (in) | Set | 204.6 - 235.4 (20.86 - 24.00, 46.00 - 52.93)/36.0 (1.4173) | |||
| Lift | 363.5 - 401.7 (37.07 - 40.96, 81.73 - 90.32)/26.7 (1.0512) | ||||
| Squareness | 2.5°, 2.3 mm (0.0906 in) or less | ||||
| Valve lifter | Outer diameter mm (in) | Standard | 34.959 - 34.975 (1.3763 - 1.3770) | ||
| Valve lifter mating surface inner diameter mm (in) | Standard | 34.994 - 35.016 (1.3777 - 1.3786) | |||
| Valve lifter and valve lifter mating surface clearance mm (in) | Standard | 0.019 - 0.057 (0.0007 - 0.0022) | |||
| Cylinder block | Warping limit (Mating surface with cylinder head) mm (in) | 0.025 (0.0010) | |||
| Grinding limit mm (in) | 0.1 (0.0039) | ||||
| Standard height mm (in) | 201.0 (7.9134) | ||||
| Cylindricality mm (in) | Limit | 0.015 (0.0006) | |||
| Out-of-roundness mm (in) | Limit | 0.010 (0.0004) | |||
| Clearance between cylinder and piston at 20°C (68°F) mm (in) | Standard | -0.010 - 0.010 (-0.0004 - 0.0004) | |||
| Cylinder inner diameter boring limit (diameter) mm (in) | To 100.005 (3.9372) | ||||
| Piston | Piston grade point mm (in) | 38.2 (1.5039) | |||
| 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 | Degree of fit | Piston pin must be fitted into position with thumb at 20°C (68°F). | |||
| Clearance between piston pin hole and piston pin mm (in) | Standard | 0.004 - 0.008 (0.0002 - 0.0003) | |||
| Piston ring | Piston ring gap mm (in) | Top ring | Standard | 0.23 - 0.28 (0.0091 - 0.0110) | |
| Second ring | Standard | 0.37 - 0.52 (0.015 - 0.0205) | |||
| Oil ring | Standard | 0.20 - 0.50 (0.0079 - 0.0197) | |||
| Clearance between piston ring and piston ring groove 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 and connecting rod bearing | Bend or twist per 100 mm (3.9370 in) in length mm (in) | Limit | 0.10 (0.0039) | ||
| Thrust clearance mm (in) | Standard | 0.070 - 0.330 (0.0028 - 0.0130) | |||
| Oil clearance mm (in) | Standard | 0.017 - 0.045 (0.0007 - 0.0018) | |||
| Bearing size (Thickness at center) mm (in) |
Standard | 1.490 - 1.506 (0.0587 - 0.0593) | |||
| 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 and crankshaft bearing | Bending limit mm (in) | 0.035 (0.0014) | |||
| Crank pin | Cylindricality mm (in) | Limit | 0.004 (0.0002) | ||
| Out-of-roundness mm (in) | Limit | 0.003 (0.0001) | |||
| Grinding limit (dia.) mm (in) | To 51.734 (2.0368) | ||||
| Crank journal | Cylindricality mm (in) | Limit | 0.006 (0.0002) | ||
| Out-of-roundness mm (in) | Limit | 0.005 (0.0002) | |||
| Grinding limit (dia.) mm (in) | To 59.742 (2.3520) | ||||
| Crank pin outer diameter mm (in) | Standard | 51.976 - 52.000 (2.0463 - 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 | 59.984 - 60.008 (2.3616 - 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) | ||||
| Bearing size (Thickness at center) mm (in) | #1, #3 | Standard | 1.998 - 2.015 (0.0787 - 0.0793) | ||
| 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 - 2.017 (0.0787 - 0.0794) | |||
| 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) | ||||
| Thrust clearance mm (in) | Standard | 0.030 - 0.115 (0.0012 - 0.0045) | |||
| Oil clearance mm (in) | Standard | 0.010 - 0.030 (0.0004 - 0.0012) | |||