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Toyota 22R Specifications
The Toyota 22R is a 2.4 L (2,366 cc, 144.38 cubic inches) straight-four 4-stroke naturally aspirated gasoline engine from Toyota R-family. The engine was manufactured by Toyota Motor Corporation since 1981 to 1995. The engine features a cast-iron block and aluminum cylinder head with the single overhead camshaft (SOHC) and two valves per cylinder (8 in total). Compression ratio rating is 9.0:1. Cylinder bore and piston stroke are 92.0 mm (3.62 in) and 89.0 mm (3.5 in). The Toyota 22R engine has a carburetor fuel system and ignition system with a mechanical distributor. In 1983, Toyota swapped the dual-row timing chain used in older 22R engines for a single-row chain with plastic guides. In 1985, the 22R engine was redesigned, many parts from the newer 22R (such as cylinder head, block, pistons, the timing chain, and cover, water and oil pumps) are not compatible with those from the older pre-1985 engine. The engine can output from 98 PS (72 kW; 97 HP) at 4,800 rpm to 110 PS (81 kW; 109 HP) at 5,000 rpm of maximum power and from 174 Nm (17.7 kgm, 128 ft-lb) at 2,800 rpm to 187 Nm (19.1 kgm, 138 ft-lb) at 3,400 rpm of peak torque. Engine code identification: 22 – 22 generation engine, R – Engine family.
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| General Technical Data |
Engine Model ............... Toyota 22R
Engine Type ............... Four-cycle four-cylinder inline 8-valve SOHC petrol engine
Number of Cylinders ............... 4
Number of Valves ............... 8
Displacement, cu.in (L) ............... 144.4 (2.37)
Cylinder Bore, in (mm) ............... 3.62 (92.0)
Piston Stroke, in (mm) ............... 3.50 (89.0)
Rated Engine Power, hp (kW) ............... 110 (81)
Rated Engine Speed, rpm ............... 5000
Maximum Torque, Nm (lb-ft) ............... 187 (138)
Torque Speed, rpm ............... 3400
Firing Order ............... 1-3-4-2
Compression Ratio ............... 9:1
Cylinder Bore Type ............... Cast-iron
Electrical System Rating, Volts ............... 12
| Fuel System |
Fuel System ............... Carburetor
Carburetor Type ............... Two barrel
Fuel Pump Type ............... Mechanical
Fuel Type ............... Gasoline
| Cylinder Block |
Cylinder Compression (Std), psi (kPa) ............... 170 (1175)
Cylinder Compression (Min), psi (kPa) ............... 142 (980)
Cylinder Bore Inside Diameter (Std), in (mm) ............... 3.622-3.6232 (92.000-92.030)
Connecting Rod Big End Inside Diameter (Std), in (mm) ............... 2.2047-2.205 (56.000-56.006)
Crankshaft Journal Outside Diameter, in (mm) ............... 2.3616-2.3622 (59.984-60.000)
Crank Pin Journal Outside Diameter, in (mm) ............... 2.0861-2.0866 (52.988-53.000)
Camshaft Journal Outside Diameter, in (mm) ............... 1.2984-1.2992 (32.98-33.00)
Piston Skirt Diameter, in (mm) ............... 3.6209-3.622 (91.970-92.000)
Top Ring End Gap (Standard), in (mm) ............... 0.0098-0.0185 (0.25-0.47)
Middle Ring End Gap (Standard), in (mm) ............... 0.0236-0.0323 (0.60-0.82)
Oil Ring End Gap (Standard), in (mm) ............... 0.0079-0.0224 (0.20-0.57)
| Cylinder Head and Valves |
Cylinder Head Warpage (Maximum), in (mm) ............... 0.0039 (0.10)
Guide Bushing Inside Diameter, in (mm) ............... 0.3154-0.3161 (8.010-8.030)
Valve Stem to Guide Bushing Clearance (Intake), in (mm) ............... 0.0010-0.0024 (0.025-0.060)
Valve Stem to Guide Bushing Clearance (Exhaust), in (mm) ............... 0.0012-0.0026 (0.030-0.065)
Intake Valve Head Diameter, in (mm) ............... 1.7717 (45.0)
Exhaust Valve Head Diameter, in (mm) ............... 1.4567 (37.0)
Intake Valve Clearance, in (mm) ............... 0.008 (0.20)
Exhaust Valve Clearance, in (mm) ............... 0.012 (0.30)
Intake Valve Length, in (mm) ............... 4.4685 (113.5)
Exhaust Valve Length, in (mm) ............... 4.4252 (112.4)
Intake Valve Stem Outside Diameter, in (mm) ............... 0.3138-0.3144 (7.970-7.985)
Exhaust Valve Stem Outside Diameter, in (mm) ............... 0.3136-0.3142 (7.965-7.980)
Valve Spring Free Length, in (mm) ............... 1.9094 (48.5)
Cam Height (Intake), in (mm) ............... 1.6783-1.6819 (42.63-42.72)
Cam Height (Exhaust), in (mm) ............... 1.6807-1.6842 (42.69-42.78)
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