Repair without removing from the car
General parameters
| Characteristic | Meaning |
Firing order | 1–3–4–2 |
Cylinder numbering (from left to right) | 1–2–3–4 |
Cylinder diameter, mm | 81.03 |
Piston stroke, mm |
|
| B18B1 | 88.90 |
| B18C1 and B18C5 | 87.12 |
| Working volume, cm³ (l) | |
| B18B1 | 1835 (1.8) |
| B18C1 and B18C5 | 1803 (1.8) |
Cylinder arrangement and direction of rotation of the ignition distributor
Camshaft
| Characteristic | Meaning |
Axial clearance, mm | |
nominal | 0.051÷0.152 |
maximum permissible | 0.508 |
Height of cam in lifting plane, mm | |
b18B1 | |
intake | 33.7160 |
graduation | 33.5280 |
b18C1 | |
intake | |
primary | 33.4112 |
intermediate | 36.3779 |
secondary | 34.5465 |
graduation | |
primary | 33.1114 |
intermediate | 35.7200 |
secondary | 34.3814 |
b18C5 | |
intake | |
primary | 33.0886 |
intermediate | 35.9105 |
secondary | 34.7320 |
graduation | |
primary | 32.7838 |
intermediate | 36.3322 |
secondary | 34.6913 |
Lateral runout, mm | |
nominal | 0.025 |
maximum permissible | 0.051 |
Working clearance in bearings, mm | |
| b18B1 | |
nominal | 0.0305÷0.0686 |
maximum permissible | 0.152 |
| B18C1 and B18C5 | |
nominal | 0.0508÷0.0889 |
maximum permissible | 0.152 |
Oil pump
| Characteristic | Meaning |
Working clearances of gears, mm |
|
axial clearance of gears |
|
nominal | 0.025÷0.076 |
maximum permissible | 0.152 |
the gap between the tops of the gear teeth | |
nominal | 0.051÷0.152 |
maximum permissible | 0.203 |
clearance between the outer gear and the housing walls | |
nominal | 0.025÷0.076 |
maximum permissible | 0.152 |
Tightening force of threaded connections, Nm
| Characteristic | Meaning |
Camshaft Bearing Cap Fastening Bolts | |
b18B1 | 12.2 |
b18C1 and B18C5 | |
6mm bolts | 12.2 |
8mm bolts | 27 |
Camshaft Timing Gear Bolts | |
b18B1 | 37 |
b18C1 and B18C5 | 56 |
Crankshaft Fluctuation Sensor Bolts | 10.8 |
Crankshaft pulley bolt | 176 |
Cylinder head bolts | |
stage 1 | 30 |
stage 2 | |
b18B1 | 83 |
b18C1 and B18C5 | 85 |
Bolts securing the drive disc to the crankshaft | 73 |
Intake manifold mounting bolts/nuts | 23 |
Nuts for fastening the air chamber of the intake manifold (B18C1) | 23 |
Exhaust manifold to cylinder head mounting nuts | 31 |
Nuts securing the inlet pipe to the exhaust manifold | 54 |
Exhaust Manifold Upper Cover Bolts | 23 |
Flywheel to crankshaft mounting bolts | 103 |
Oxygen sensor (l-probe) | 45 |
Oil Sprayer Bolts | 17.6 |
Oil pressure switch sensor | 17.6 |
Oil pan oil deflector plate mounting bolts | |
b18B1 and B18C1 | 10.8 |
b18C5 | 9.7 |
Engine oil pan drain plug | 45 |
Oil pan to engine mounting bolts | 10.8 |
Nuts for fastening the oil intake tube to the pump body | |
b18B1 and B18C1 | 10.8 |
b18C5 | 9.7 |
Fastening the oil pump oil intake to the main bearing cap bridge | |
b18B1 and B18C1 | 10.8 |
b18C5 | 9.7 |
Bolts for fastening the oil pump housing to the engine |
|
bolts 6mm | |
b18B1 and B18C1 | 10.8 |
b18C5 | 9.7 |
bolts 8mm | 23 |
Fastening the oil pump cover | |
1994 and 1995 | 5.4 |
since 1996 | 6.8 |
Oil pump pressure relief valve plug | 39 |
Crankshaft Rear Oil Seal Retainer Bolts | 10.8 |
Timing Belt Cover Fastening Bolts | 9.7 |
Timing Belt Tensioner Fastening Bolt | 5.4 |
Cylinder head cover fastening nuts | 9.7 |
VTEC Lockup Solenoid Valve Mounting Bolts | 11.8 |
Water pump mounting bolts | 11.8 |
General and major engine repairs
General parameters
| Characteristic | Meaning |
Compression pressure in cylinders, kgf/cm² | |
| B18B1 | |
Nominal | 13.9 |
Minimum acceptable | 9.8 |
Maximum permissible difference between cylinders | 2.0 |
| B18C1 and B18C5 | |
Nominal | 18.9 |
Minimum acceptable | 9.8 |
| Maximum permissible difference between cylinders | 2.0 |
Oil pressure (the engine is warmed up to normal operating temperature), kgf/cm² | |
At idle speed | 0.7 |
At an engine speed of 3000 rpm | 3.5 |
Engine block
| Characteristic | Meaning |
Cylinder diameter, mm | |
Nominal | 81.001÷81.026 |
Maximum permissible | 87.077 |
Maximum permissible cylinder taper, mm | 0.051 |
Maximum permissible cylinder ovality, mm | 0.051 |
Maximum permissible excess of cylinder diameter, mm | 0.254 |
Maximum permissible non-flatness of the mating surface, mm | 0.102 |
Pistons and piston rings
| Characteristic | Meaning |
Piston diameter, mm |
|
Nominal | 80.975÷81.001 |
Maximum permissible | 80.975 |
Height of the diameter measurement point from the skirt cut, mm | 15.8 |
Piston clearance in cylinder, mm |
|
Nominal | 0.0102÷0.0406 |
Maximum permissible | 0.051 |
Piston ring clearance in grooves, mm | |
Upper compression ring |
|
Nominal | 0.0457÷0.0711 |
Maximum permissible | 0.127 |
Second compression ring |
|
| B18B1 (Riken) | 0.0406÷0.0660 |
| B18B1 (Teikoku) | 0.0457÷0.0711 |
| B18C1 and B18C5 | |
Nominal | 0.0457÷0.0711 |
Maximum permissible | 0.127 |
Clearances in piston ring locks, mm | |
Upper compression ring | |
| B18B1 (Riken) | 0.203÷0.356 |
| B18B1 (Teikoku) | 0.203÷0.305 |
| B18C1 and B18C5 | |
Nominal | 0.203÷0.356 |
Maximum permissible (all) | 0.610 |
Second compression ring | |
Nominal | 0.406÷0.559 |
Maximum permissible (all) | 0.711 |
Oil scraper ring | |
| B18B1 (Riken) | 0.203÷0.508 |
| B18B1 (Teikoku) | 0.203÷0.457 |
| B18C1 and B18C5 | |
Nominal | 0.203÷0.508 |
Maximum permissible (all) | 0.711 |
Crankshaft and connecting rods
| Characteristic | Meaning |
Axial clearance, mm | |
Nominal | 0.102÷0.356 |
Maximum permissible | 0.457 |
Main bearing journals | |
Diameter, mm | 54.9758÷55.0012 |
| no. 1, 2, 4 and 5 | |
| №3 | |
| B18B1 | |
| B18C1 and B18C5 | |
Maximum permissible taper, mm | 0.0051 |
Maximum permissible ovality, mm | 0.0051 |
Maximum permissible runout, mm | 0.051 |
Working clearance in main bearings, mm | |
Necks 1, 2, 4 and 5 | |
Nominal | 0.0178÷0.0356 |
Maximum permissible | 0.051 |
Neck #3 | |
Nominal | 0.0229÷0.0432 |
Maximum permissible | 0.051 |
Connecting rod bearing journals | |
Diameter, mm | 44.9758÷45.0012 |
Maximum permissible taper, mm | 0.0051 |
Maximum permissible ovality, mm | 0.0051 |
Maximum permissible runout, mm | 0.051 |
Working clearance in connecting rod bearings, mm | |
| B18B1 | |
Nominal | 0.0203÷0.0381 |
Maximum permissible | 0.051 |
| B18C1 and B18C5 | |
Nominal | |
Maximum permissible | |
Lateral play of connecting rods, mm | |
Nominal | 0.152÷0.305 |
Maximum permissible | 0.406 |
Cylinder head and valve mechanism
| Characteristic | Meaning |
Maximum permissible non-flatness of the mating surface of the head, mm | |
Without groove | 0.051 |
Repair | 0.203 |
Cylinder head height, mm | 92.939÷93.040 |
Valve seat chamfer angle | 45° |
The angle of inclination of the working chamfer of the valve plates | 45° |
Width of the cylindrical part (belt) of the forming surface of the valve plate, mm | |
Intake valves | 1.143 |
Exhaust valves | 1.448 |
Valve stem diameter, mm | |
| B18B1 | |
Intake valves | |
Nominal | 6.5811÷6.5888 |
Maximum permissible | 6.553 |
Exhaust valves | |
Nominal | 6.5507÷6.5608 |
Maximum permissible | 6.528 |
| B18C1 and B18C5 | |
Intake valves | |
Nominal | 5.4762÷5.4839 |
Maximum permissible | 5.58 |
Exhaust valves | |
Nominal | 5.4508÷5.4610 |
Maximum permissible | 5.04 |
Inner diameter of valve guide bushings, mm | |
| B18B1 | |
Nominal | 6.6046.629 |
Maximum permissible | 6.655 |
| B18C1 and B18C5 | |
Nominal | 5.512÷5.537 |
Maximum permissible | 5.563 |
Valve stem seat clearance in guide bushings, mm | |
Intake valves | |
Nominal | 0.025÷0.051 |
Maximum permissible | 0.076 |
Exhaust valves | |
Nominal | 0.051÷0.076 |
Maximum permissible | 0.102 |
Installation height of valve stems, mm | |
| B18B1 | |
| Intake valves | |
Nominal | 40.7645÷41.2344 |
Maximum permissible | 41.2344 |
| Intake valves | |
Nominal | 42.7660÷43.2369 |
Maximum permissible | 43.4848 |
| B18C1 and B18C5 | |
| Intake valves | |
Nominal | 37.4650÷37.9349 |
Maximum permissible | 38.1838 |
| Intake valves | |
Nominal | 37.1653÷37.6352 |
Maximum permissible | 37.8841 |
Free length of valve springs, mm | |
B18B1 | |
Intake valves | 42.367 |
Exhaust valves | 47.092 |
B18C1 | |
Intake valves | |
| External | 41.046 |
| Internal (Nihon Hatsujo) | 36.170 |
| Internal (Chuo Hatsujo) | 36.195 |
| Exhaust valves | |
| Nihon Hatsujo | 41.961 |
| Chuo Hatsujo | 41.935 |
| B18C5 | |
Intake valves | |
| External | 43.180 |
| Internal | 36.830 |
| Exhaust valves | |
| External | 41.046 |
| Internal | 36.170 |
Tightening force of threaded connections, Nm
| Connection type | Meaning |
Main bearing cap bolts | |
Stage 1 | 30 |
Stage 2 | |
B18B1 | 76 |
B18C1 and B18C5 | |
Lids No.1 and 5 | 76 |
Lids No.2, 3 and 4 | 65 |
Connecting rod lower head cap nuts | |
Stage 1 | 19 |
Stage 2 | |
B18B1 | 31 |
B18C1 and B18C5 | 45 |
*See also In-Vehicle Repair Specifications.