GENERAL SPECIFICATIONS
| Item | Specifications | ||
|---|---|---|---|
| Engine model | 4B12 | ||
| Bore x stroke mm (in) | 88.0 (3.46) x 97.0 (3.82) | ||
| Total displacement cm 3 (cu in) | 2, 359 (143.9) | ||
| Combustion chamber | Pent-roof type | ||
| Number of cylinders | 4 | ||
| Valve mechanism | Type | DOHC | |
| Intake valve | 8 | ||
| Exhaust valve | 8 | ||
| Compression ratio | 10.5 | ||
| Valve timing | Intake valve | Opens | 40°BTDC - 0°BTDC |
| Closes | 64°ABDC - 24°ABDC | ||
| Exhaust valve | Opens | 24°BBDC - 44°BBDC | |
| Closes | 0°ATDC - 20°ATDC | ||
| Fuel injection system type | Electronic control MPI | ||
| Ignition system type | Electronic spark-advance control type (4-coil type) | ||
| Generator type | Alternating current system (with built-in IC regulator) | ||
| Starter motor type | Reduction drive type | ||
GENERAL SPECIFICATIONS
SERVICE SPECIFICATIONS
| Item | Standard value | Limit | |
|---|---|---|---|
| Timing chain | |||
| Valve clearance mm (in) | Intake | 0.20 ± 0.03 (0.008 ± 0.001) | |
| Exhaust | 0.30 ± 0.03 (0.012 ± 0.001) | ||
| Camshaft | |||
| Cam height of camshaft mm (in) | Intake | 44.1 (1.736) | 43.6 (1.717) |
| Exhaust | 45.0 (1.772) | 44.5 (1.752) | |
| Camshaft oil clearance mm (in) | 0 - 0.032 (0.0013) | ||
| Cylinder head and valves | |||
| Distortion of cylinder head bottom mm (in) | Within 0.05 (0.002) | 0.2 (0.008) | |
| Grinding limit of cylinder head bottom mm (in) | 0.2 (0.008) | ||
| Overall height of cylinder head mm (in) | 128.5 (5.06) | ||
| Overall length of valve mm (in) | Intake | 113.18 (4.456) | 112.68 (4.436) |
| Exhaust | 105.89 (4.169) | 105.39 (4.149) | |
| Valve margin mm (in) | Intake | 1.022 (0.0402) | 0.522 (0.0206) |
| Exhaust | 1.094 (0.0431) | 0.594 (0.0234) | |
| Free height of valve spring mm (in) | 47.2 (1.858) | 46.2 (1.819) | |
| Squareness of valve spring | 2° or less | 4° | |
| Clearance between valve guide and valve stem mm (in) | Intake | 0.020 - 0.047 (0.0008 - 0.0019) | 0.10 (0.0039) |
| Exhaust | 0.030 - 0.054 (0.0012 - 0.0021) | 0.11 (0.0043) | |
| Valve seat contact width mm (in) | Intake | 1.16 - 1.46 (0.046 - 0.058) | |
| Exhaust | 1.35 - 1.65 (0.053 - 0.065) | ||
| Valve guide press-in height mm (in) | 14.6 - 15.2 (0.57 - 0.60) | ||
| Piston and connecting rod | |||
| Piston pin press-fit load N (lb.ft) | 7, 500 - 17, 500 (1.686 - 3.934) | ||
| Clearance between piston ring and ring groove mm (in) | Number 1 | 0.03 - 0.07 (0.001 - 0.003) | 0.1 (0.004) |
| Number 2 | 0.03 - 0.07 (0.001 - 0.003) | 0.1 (0.004) | |
| Piston ring end gap mm (in) | Number 1 | 0.15 - 0.25 (0.006 - 0.011) | 0.8 (0.03) |
| Number 2 | 0.25 - 0.40 (0.010 - 0.016) | 0.8 (0.03) | |
| Oil | 0.10 - 0.35 (0.004 - 0.014) | 1.0 (0.04) | |
| Clearance of connecting rod big end thrust mm (in) | 0.10 - 0.25 (0.004 - 0.010) | 0.4 (0.016) | |
| Difference of outside diameter of connecting rod bolt mm (in) | 0.1 (0.04) | ||
| Connecting rod bearing oil clearance mm (in) | 0.018 - 0.045 (0.0007 - 0.0018) | 0.1 (0.04) | |
| Crankshaft and cylinder block | |||
| Under head length of crankshaft bearing cap bolt mm (in) | 75.5 - 76.5 (2.972 - 3.012) | ||
| Crankshaft end play mm (in) | 0.05 - 0.25 (0.002 - 0.010) | 0.4 (0.016) | |
| Crankshaft journal oil clearance mm (in) | 0.012 - 0.030 (0.0005 - 0.0012) | 0.08 (0.0031) | |
| Distortion of cylinder block top surface mm (in) | Within 0.05 (0.002) | 0.2 (0.008) | |
| Grinding limit of cylinder block top surface mm (in) | 0.2 (0.008) | ||
| Cylinder block cylinder bore mm (in) | 88 (3.46) | ||
| Cylindricity of cylinder block mm (in) | 0.0076 (0.0003) | ||
SERVICE SPECIFICATIONS
TORQUE SPECIFICATIONS
| Item | Specification |
|---|---|
| Generator and ignition system | |
| Idler pulley bolt | 48 ± 7 N.m (36 ± 4 ft-lb) |
| Auto tensioner bolt | 22 ± 4 N.m (17 ± 2 ft-lb) |
| Crankshaft pulley center bolt | 210 N.m (155 ft-lb) |
| Generator nut | 44 ± 10 N.m (32 ± 7 ft-lb) |
| Generator bolt | 44 ± 10 N.m (32 ± 7 ft-lb) |
| Ignition coil bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Spark plug | 25 ± 5 N.m (18 ± 3 ft-lb) |
| Power steering pump bracket bolt (M8) | 26 ± 3 N.m (19 ± 2 ft-lb) |
| Power steering pump bracket bolt (M10) | 44 ± 8 N.m (32 ± 5 ft-lb) |
| Throttle body and EGR system | |
| Vacuum pipe and hose bolt | 11 ± 1 N.m (98 ± 8 in-lb) |
| Throttle body bolt | 9.5 ± 2.5 N.m (84 ± 22 in-lb) |
| Throttle body stay bolt | 20 ± 2 N.m (15 ± 1 ft-lb) |
| EGR valve support bolt | 20 ± 2 N.m (15 ± 1 ft-lb) |
| EGR pipe bolt | 20 ± 2 N.m (15 ± 1 ft-lb) |
| EGR support stay A bolt | 20 ± 2 N.m (15 ± 1 ft-lb) |
| EGR support stay B bolt | 20 ± 2 N.m (15 ± 1 ft-lb) |
| EGR valve bolt | 24 ± 3 N.m (18 ± 1 ft-lb) |
| Manifold absolute pressure (MAP) sensor screw | 4.0 ± 1.0 N.m (36 ± 8 in-lb) |
| Solenoid valve screw | 4.0 ± 1.0 N.m (36 ± 8 in-lb) |
| Intake manifold and fuel system | |
| Oil dipstick guide bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Injector protector rear bolt | 3.5 ± 1.5 N.m (31 ± 13 in-lb) --> 20 ± 2 N.m (15 ± 1 ft-lb) |
| Fuel rail bolt | 3.5 ± 1.5 N.m (31 ± 13 in-lb) --> 20 ± 2 N.m (15 ± 1 ft-lb) |
| Intake manifold bolt and nut | 3.5 ± 1.5 N.m (31 ± 13 in-lb) --> 20 ± 2 N.m (15 ± 1 ft-lb) |
| Intake manifold stay bolt | 20 ± 2 N.m (15 ± 1 ft-lb) |
| Injector protector front bolt | 3.5 ± 1.5 N.m (31 ± 13 in-lb) --> 20 ± 2 N.m (15 ± 1 ft-lb) |
| Generator bracket bolt | 44 ± 8 N.m (33 ± 5 ft-lb) |
| Detonation sensor bolt | 20 ± 2 N.m (15 ± 1 ft-lb) |
| Engine oil pressure switch | 10 ± 2 N.m (89 ± 17 in-lb) |
| Exhaust manifold | |
| Exhaust manifold upper cover bolt | 14 ± 1 N.m (124 ± 8 in-lb) |
| Exhaust manifold lower cover bolt | 14 ± 1 N.m (124 ± 8 in-lb) |
| Exhaust manifold nut | 49 ± 5 N.m (36 ± 3 ft-lb) |
| Exhaust manifold bracket bolt (M8) | 20 ± 5 N.m (15 ± 3 ft-lb) |
| Exhaust manifold bracket bolt (M10) | 41 ± 10 N.m (30 ± 7 ft-lb) |
| Crankshaft position sensor bolt | 11 ± 1 N.m (98 ± 8 in-lb) |
| Crankshaft position sensor cover bolt | 11 ± 1 N.m (98 ± 8 in-lb) |
| Water hose and pipe | |
| Water inlet fitting bolt | 24 ± 3 N.m (18 ± 1 ft-lb) |
| Water outlet fitting bolt | 24 ± 3 N.m (18 ± 1 ft-lb) |
| Thermostat housing bolt | 24 ± 3 N.m (18 ± 1 ft-lb) |
| Engine hanger bolt | 28 ± 8 N.m (21 ± 5 ft-lb) |
| Engine coolant temperature sensor | 30 ± 9 N.m (22 ± 6 ft-lb) |
| Water pump bolt | 24 ± 3 N.m (18 ± 1 ft-lb) |
| Water pipe nut | 24 ± 3 N.m (18 ± 1 ft-lb) |
| Camshaft position sensor bolt | 11 ± 1 N.m (98 ± 8 in-lb) |
| Oil pan and timing chain case | |
| Cylinder head cover bolt | 3.0 ± 1.0 N.m (27 ± 8 in-lb) --> 5.5 ± 0.5 N.m (49 ± 4 in-lb) |
| Timing chain case bolt (M6) | 10 ± 2 N.m (89 ± 17 in-lb) |
| Timing chain case bolt (M8 x 10) | 13 ± 1 N.m (115 ± 8 in-lb) |
| Timing chain case bolt (M8 x 28) | 24 ± 4 N.m (18 ± 2 ft-lb) |
| Oil pan bolt (M6) | 10 ± 2 N.m (89 ± 17 in-lb) |
| Oil pan bolt (M8) | 29 ± 2 N.m (21 ± 1 ft-lb) |
| Air compressor bracket bolt | 23 ± 6 N.m (17 ± 4 ft-lb) |
| Oil drain plug | 39 ± 5 N.m (29 ± 3 ft-lb) |
| Oil filter | 14 ± 2 N.m (124 ± 17 in-lb) |
| Positive Crankcase Ventilation Valve | 2.5 ± 0.4 N.m (22 ± 3 in-lb) |
| Engine support bracket bolt | 48 ± 6 N.m (35 ± 4 ft-lb) |
| Timing chain | |
| V. V. T. intake sprocket bolt | 59 ± 5 N.m (44 ± 3 ft-lb) |
| V. V. T. exhaust sprocket bolt | 59 ± 5 N.m (44 ± 3 ft-lb) |
| Timing chain tensioner bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Tensioner lever bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Timing chain guide bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Camshaft | |
| Engine oil control valve (OCV) bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Camshaft bearing cap bolt (M6) | 12 ± 1 N.m (107 ± 8 in-lb) |
| Front camshaft bearing cap bolt (M8) | 17 ± 3 N.m (14 ± 2 ft-lb) --> 30 ± 2 N.m (22 ± 1 ft-lb) |
| Cylinder head and valves | |
| Cylinder head bolt | 35 ± 2 N.m (26 ± 1 ft-lb) --> +90° --> +90° |
| Balancer chain | |
| Drive plate bolt | 40 N.m (30 ft-lb) --> 130 N.m (95 ft-lb) |
| Flywheel bolt | 40 N.m (30 ft-lb) --> 130 N.m (95 ft-lb) |
| Balancer shaft module bolt | 20 N.m (15 ft-lb) --> 44 N.m (32 ft-lb) --> 0 --> 20 N.m (15 ft-lb) --> +135° |
| Balancer shaft chain tensioner bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Lever tensioner bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Balancer shaft chain guide bolt | 10 ± 2 N.m (89 ± 17 in-lb) |
| Ladder frame bolt | 26 ± 1 N.m (19 ± 1 ft-lb) |
| Piston and connecting rod | |
| Connecting rod cap bolt | 5.0 N.m (44 in-lb) --> 20 N.m (15 ft-lb) --> +90° |
| Crankshaft and cylinder block | |
| Crankshaft sensing ring bolt | 11 ± 1 N.m (98 ± 8 in-lb) |
| Bearing cap bolt | 26.5 ± 2.0 N.m (20 ± 1 ft-lb) --> +45° |
TORQUE SPECIFICATIONS
NEW TIGHTENING METHOD BY USING PLASTIC REGION TIGHTENING BOLT
Plastic region tightening bolts are used in some parts of the engine. Install these bolts according to the method described in the Service Information because the tightening method of these bolts are different from the conventional method. The service limit is determined for these bolts. Be sure to strictly follow the service limit described in the Service Information.
- Parts to be used Cylinder head bolt Bearing cap bolt Connecting rod cap bolt
- Tightening method After tightening to the specified tightening torque, further tighten 90° and 90°, or 180° (90° + 90°). Follow the tightening method described in the Service Information because the tightening method differs from part to part.