Repair without removal from the car
Common parameters
Characteristic | Meaning |
Ignition 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) |
Arrangement of cylinders and direction of rotation of the ignition distributor
Camshaft
Characteristic | Meaning |
Axial play, mm | |
Nominal | 0.051÷0.152 |
Maximum allowable | 0.508 |
Cam height in the lifting plane, mm | |
B18B1 | |
inlet | 33.7160 |
graduation | 33.5280 |
B18C1 | |
inlet | |
Primary | 33.4112 |
Intermediate | 36.3779 |
Secondary | 34.5465 |
graduation | |
Primary | 33.1114 |
Intermediate | 35.7200 |
Secondary | 34.3814 |
B18C5 | |
inlet | |
Primary | 33.0886 |
Intermediate | 35.9105 |
Secondary | 34.7320 |
graduation | |
Primary | 32.7838 |
Intermediate | 36.3322 |
Secondary | 34.6913 |
Lateral runout, mm | |
Rated | 0.025 |
Maximum allowable | 0.051 |
Operating clearance in bearings, mm | |
B18B1 | |
Nominal | 0.0305÷0.0686 |
Maximum allowable | 0.152 |
B18C1 and B18C5 | |
Nominal | 0.0508÷0.0889 |
Maximum allowable | 0.152 |
Oil pump
Characteristic | Meaning |
Working clearances of gears, mm | |
Axial gear clearance | |
Nominal | 0.025÷0.076 |
Maximum allowable | 0.152 |
Gap between the tops of the gear teeth | |
Nominal | 0.051÷0.152 |
Maximum allowable | 0.203 |
Gap between outer gear and housing walls | |
Nominal | 0.025÷0.076 |
Maximum allowable | 0.152 |
Tightening force of threaded connections, Nm
Characteristic | Meaning |
Bolts of fastening of covers of bearings of a camshaft | |
B18B1 | 12.2 |
B18C1 and B18C5 | |
6 mm bolts | 12.2 |
8 mm bolts | 27 |
Camshaft 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 of fastening of a driving disk to a cranked shaft | 73 |
Bolts/nuts of fastening of the inlet pipeline | 23 |
Nuts of fastening of the air chamber of the inlet pipeline (B18C1) | 23 |
Nuts of fastening of a final collector to a head of cylinders | 31 |
Nuts of fastening of a reception pipe to a final collector | 54 |
Exhaust manifold top cover bolts | 23 |
Bolts of fastening of a flywheel to a cranked shaft | 103 |
Oxygen sensor (l-probe) | 45 |
Oil sprayer bolts | 17.6 |
Oil pressure switch | 17.6 |
Oil pan mounting bolts | |
B18B1 and B18C1 | 10.8 |
B18C5 | 9.7 |
Engine oil pan drain plug | 45 |
Bolts of fastening of the pallet crankcase to the engine | 10.8 |
Nuts for fastening the oil intake tube to the pump housing | |
B18B1 and B18C1 | 10.8 |
B18C5 | 9.7 |
Fastening of the oil intake of the oil pump to the bridge of the main bearing caps | |
B18B1 and B18C1 | 10.8 |
B18C5 | 9.7 |
Bolts of fastening of the case of the oil pump to the engine | |
Bolts 6 mm | |
B18B1 and B18C1 | 10.8 |
B18C5 | 9.7 |
Bolts 8 mm | 23 |
Oil pump cover fixing | |
1994 and 1995 | 5.4 |
since 1996 | 6.8 |
Oil pump pressure reducing valve plug | 39 |
Bolts of the holder of a back epiploon of a cranked shaft | 10.8 |
Bolts of fastening of covers of a gas-distributing belt | 9.7 |
Timing belt tensioner mounting bolt | 5.4 |
Nuts of fastening of a cover of a head of cylinders | 9.7 |
Bolts of fastening of the electromagnetic valve of blocking of VTEC | 11.8 |
Water pump mounting bolts | 11.8 |
General and overhaul of the engine
Common parameters
Characteristic | Meaning |
Compression pressure in cylinders, kgf/cm2 | |
B18B1 | |
Rated | 13.9 |
Minimum allowable | 9.8 |
Maximum allowable difference between cylinders | 2.0 |
B18C1 and B18C5 | |
Rated | 18.9 |
Minimum allowable | 9.8 |
Maximum allowable difference between cylinders | 2.0 |
Oil pressure (engine warmed up to normal operating temperature), kgf/cm2 | |
At idle | 0.7 |
At an engine speed of 3000 rpm | 3.5 |
Engine block
Characteristic | Meaning |
Cylinder diameter, mm | |
Nominal | 81.001÷81.026 |
Maximum allowable | 87.077 |
Maximum allowable taper of the cylinder, mm | 0.051 |
Maximum allowable ovality of the cylinder, mm | 0.051 |
Maximum allowable excess of the cylinder diameter, mm | 0.254 |
Maximum allowable flatness of the mating surface, mm | 0.102 |
Pistons and piston rings
Characteristic | Meaning |
Piston diameter, mm | |
Nominal | 80.975÷81.001 |
Maximum allowable | 80.975 |
Height of the diameter measurement point from the cut of the skirt, mm | 15.8 |
Piston fit clearance in cylinder, mm | |
Nominal | 0.0102÷0.0406 |
Maximum allowable | 0.051 |
Gap of landing of piston rings in grooves, mm | |
Top compression ring | |
Nominal | 0.0457÷0.0711 |
Maximum allowable | 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 allowable | 0.127 |
Clearances in piston ring locks, mm | |
Top compression ring | |
B18B1 (Riken) | 0.203÷0.356 |
B18B1 (Teikoku) | 0.203÷0.305 |
B18C1 and B18C5 | |
Nominal | 0.203÷0.356 |
Maximum allowable (All) | 0.610 |
Second compression ring | |
Nominal | 0.406÷0.559 |
Maximum allowable (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 allowable (All) | 0.711 |
Crankshaft and connecting rods
Characteristic | Meaning |
Axial play, mm | |
Nominal | 0.102÷0.356 |
Maximum allowable | 0.457 |
Main bearing journals | |
Diameter, mm | 54.9758÷55.0012 |
Nos. 1, 2, 4 and 5 | |
№ 3 | |
B18B1 | |
B18C1 and B18C5 | |
Maximum allowable taper, mm | 0.0051 |
Maximum allowable ovality, mm | 0.0051 |
Maximum allowable runout, mm | 0.051 |
Working clearance in main bearings, mm | |
Necks 1, 2, 4 and 5 | |
Nominal | 0.0178÷0.0356 |
Maximum allowable | 0.051 |
Neck number 3 | |
Nominal | 0.0229÷0.0432 |
Maximum allowable | 0.051 |
Connecting rod bearing journals | |
Diameter, mm | 44.9758÷45.0012 |
Maximum allowable taper, mm | 0.0051 |
Maximum allowable ovality, mm | 0.0051 |
Maximum allowable runout, mm | 0.051 |
Operating clearance in connecting rod bearings, mm | |
B18B1 | |
Nominal | 0.0203÷0.0381 |
Maximum allowable | 0.051 |
B18C1 and B18C5 | |
Nominal | |
Maximum allowable | |
Side play of connecting rods, mm | |
Nominal | 0.152÷0.305 |
Maximum allowable | 0.406 |
Cylinder head and valve train
Characteristic | Meaning |
Maximum permissible 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 bevel angle | 45° |
The angle of inclination of the working chamfer of the valve plates | 45° |
Width of the cylindrical part (girdle) forming surface of the valve disc, mm | |
intake valves | 1.143 |
exhaust valves | 1.448 |
Valve stem diameter, mm | |
B18B1 | |
intake valves | |
Nominal | 6.5811÷6.5888 |
Maximum allowable | 6.553 |
exhaust valves | |
Nominal | 6.5507÷6.5608 |
Maximum allowable | 6.528 |
B18C1 and B18C5 | |
intake valves | |
Nominal | 5.4762÷5.4839 |
Maximum allowable | 5.58 |
exhaust valves | |
Nominal | 5.4508÷5.4610 |
Maximum allowable | 5.04 |
Valve guide inner diameter, mm | |
B18B1 | |
Nominal | 6.6046.629 |
Maximum allowable | 6.655 |
B18C1 and B18C5 | |
Nominal | 5.512÷5.537 |
Maximum allowable | 5.563 |
Gap of landing of cores of valves in directing plugs, mm | |
intake valves | |
Nominal | 0.025÷0.051 |
Maximum allowable | 0.076 |
exhaust valves | |
Nominal | 0.051÷0.076 |
Maximum allowable | 0.102 |
Mounting height of valve stems, mm | |
B18B1 | |
intake valves | |
Rated | 40.7645÷41.2344 |
Maximum allowable | 41.2344 |
intake valves | |
Rated | 42.7660÷43.2369 |
Maximum allowable | 43.4848 |
B18C1 and B18C5 | |
intake valves | |
Rated | 37.4650÷37.9349 |
Maximum allowable | 38.1838 |
intake valves | |
Rated | 37.1653÷37.6352 |
Maximum allowable | 37.8841 |
Free length of valve springs, mm | |
B18B1 | |
intake valves | 42.367 |
exhaust valves | 47.092 |
B18C1 | |
intake valves | |
outdoor | 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 | |
outdoor | 43.180 |
Internal | 36.830 |
exhaust valves | |
outdoor | 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 |
Nuts of covers of the lower heads of connecting rods | |
Stage 1 | 19 |
Stage 2 | |
B18B1 | 31 |
B18C1 and B18C5 | 45 |
* See also Specifications for In-Vehicle Repair.