the Toyota 22R It is a 2.4 L (2,366 cc, 144.38 cu in) inline four-stroke naturally aspirated gasoline engine from Toyota’s R family. The engine was manufactured by Toyota Motor Corporation from 1981 to 1995.
The 22R engine features a cast iron block and aluminum cylinder head with a single overhead camshaft (SOHC) and two valves per cylinder (8 total). The compression ratio ratio is 9.0: 1. The cylinder bore and piston stroke are 92.0 mm (3.62 in.) And 89.0 mm (3.5 in.), Respectively. The Toyota 22R engine has a carburetor fuel system and an ignition system with a mechanical distributor.
In 1983, Toyota changed the two-row timing chain used on older 22R engines to a single-row chain with plastic guides. In 1985, the 22R engine was redesigned, many parts of the newer 22R (such as cylinder head, block, pistons, timing chain and cover, water and oil pumps) are not compatible with those of the pre-1985 engine. .
The engine produced 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 ftlb) at 2800 rpm at 187 Nm (19.1 kgm, 138 ftlb) at 3400 rpm of maximum torque.
The engine code breakdown is as follows:
- 22 – 22 generation engine
- R – Engine family
|Design||Four stroke, Inline-4 (Straight-4)|
|Fuel type||Gasoline (gasoline)|
|Displacement||2.4 liters, 2.366 cm3 (144.38 cubic inch)|
From 98 PS (72 kW; 97 HP) at 4,800 rpm
From 174 Nm (17.7 kgm, 128 ftlb) @ 2,800 rpm
|Order to open fire||1-3-4-2|
|Dimensions (L x W x H):||–|
The Toyota 22R has a cast iron cylinder block with a five bearing support system. It has a cylinder bore of 92.0 mm (3.62 in) and a piston stroke of 89.0 mm (3.5 in). The compression ratio is 9.0: 1.
|Cylinder block (86 and later)|
|Cylinder Block Alloy||Molten iron|
|Compression ratio:||9.0: 1|
|Cylinder bore:||92.0 mm (3.62 inches)|
|Piston stroke:||89.0 mm (3.5 inches)|
|Number of piston rings (compression / oil):||2/1|
|Number of main bearings:||5|
|Cylinder bore (standard):||92.000-92.030 mm (3.622-3.6232 inches)|
|Piston Skirt Diameter (Standard):||91.970-92.000 mm (3.6209-3.622 inches)|
|Connecting rod head diameter (standard):||56.000-56.006 mm (2.2047-2.205 inches)|
|Piston Ring End Gap:||Top||0.250-0.470 mm (0.0098-0.0185 inch)|
|Second||0.600-0.820 mm (0.0236-0.0323 inch)|
|Petroleum||0.200-0.570 mm (0.0079-0.0224 inch)|
|Diameter of main crankshaft journal:||59.984-60.000 mm (2.3616-2.3622 inches)|
|Crankpin diameter:||52.988-53.000 mm (2.0861-2.0866 inches)|
Main bearing cap bolt tightening procedure and torque specifications:
- 103 Nm, 10.5 kg · m; 76 ftlb
After securing the bearing cap bolts, make sure the crankshaft turns smoothly by hand.
Connecting Rod Bearing Bolts
- 69 Nm, 7.0 kg · m; 51 ftlb)
The cylinder head is made of aluminum alloy, which gives it good cooling efficiency. The engine has a single overhead camshaft, which is driven by a timing chain and two valves per cylinder (8 valves total). The diameter of the intake valve head is 45.0 mm (1.77 in) and the diameter of the exhaust valve head is 37.0 mm (1.46 in). The intake valve span is 272 °, the valve lift is 10.1mm, and the exhaust valve span is 248 °, the valve lift is 9.7mm.
|Cylinder head (86 and later)|
|Valve layout:||SOHC, chain drive|
|Valves:||8 (2 valves per cylinder)|
|Valve head diameter:||CONSUMPTION||45.0 mm (1.7717 inches)|
|Tired||37.0 mm (1.4567 inches)|
|Valve length:||CONSUMPTION||113.5 mm (4.4685 inches)|
|Tired||112.4 mm (4.4252 inches)|
|Valve stem diameter:||CONSUMPTION||7.970-7.985 mm (0.3138-0.3144 inches)|
|Tired||7.965-7.980 mm (0.3136-0.3142 inches)|
|Valve spring free length:||48.5 mm (1.9094 inches)|
|Camshaft Cam Height:||CONSUMPTION||42.63 to 42.72 mm (1.6783 to 1.6819 inches)|
|Tired||42.69-42.78 mm (1.6807-1.6842 …|