The Toyota 22R is a 2.4 L (2,366 cc, 144.38 cu·in) straight-four 4-stroke natural aspirated gasoline engine from Toyota R-family. The engine was manufactured by Toyota Motor Corporation since 1981 to 1995.
The 22R 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), respectively. 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 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 horsepower and from 174 N·m (17.7 kg·m, 128 ft·lb) at 2,800 rpm to 187 N·m (19.1 kg·m, 138 ft·lb) at 3,400 rpm of peak torque.
The breakdown of the engine code is as follows:
- 22 – 22 generation engine
- R – Engine family
|Layout||Four stroke, Inline-4 (Straight-4)|
|Fuel type||Gasoline (petrol)|
|Displacement||2.4 L, 2,366 cm3 (144.38 cu-in)|
From 98 PS (72 kW; 97 HP) at 4,800 rpm|
to 110 PS (81 kW; 109 HP) at 5,000 rpm
From 174 N·m (17.7 kg·m, 128 ft·lb) at 2,800 rpm
to 187 N·m (19.1 kg·m, 138 ft·lb) at 3,400 rpm
|Dimensions (L x W x H):||–|
The Toyota 22R has a cast-iron cylinder block with five bearing support system. It has a 92.0 mm (3.62 in) cylinder bore and 89.0 mm (3.5 in) piston stroke. Compression ratio rating is 9.0:1.
|Cylinder block (86 and later)|
|Cylinder block alloy||Cast-iron|
|Cylinder bore:||92.0 mm (3.62 in)|
|Piston stroke:||89.0 mm (3.5 in)|
|Number of piston rings (compression / oil):||2 / 1|
|Number of main bearings:||5|
|Cylinder inner diameter (standard):||92.000-92.030 mm (3.622-3.6232 in)|
|Piston skirt diameter (standard):||91.970-92.000 mm (3.6209-3.622 in)|
|Connecting rod big end diameter (standard):||56.000-56.006 mm (2.2047-2.205 in)|
|Piston ring end gap:||Top||0.250-0.470 mm (0.0098-0.0185 in)|
|Second||0.600-0.820 mm (0.0236-0.0323 in)|
|Oil||0.200-0.570 mm (0.0079-0.0224 in)|
|Crankshaft main journal diameter:||59.984-60.000 mm (2.3616-2.3622 in)|
|Crankpin diameter:||52.988-53.000 mm (2.0861-2.0866 in)|
Main bearing cap bolts tightening procedure and torque specs:
- 103 Nm, 10.5 kg·m; 76 ft·lb
After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
Connecting rod bearing bolts
- 69 Nm, 7.0 kg·m; 51 ft·lb)
The cylinder head is made of aluminum alloy which gives it good cooling efficiency. The engine has single overhead camshaft, that is driven by a timing chain and two valves per cylinder (8 valves in total). Intake valve head diameter is 45.0 mm (1.77 in), and exhaust valve head diameter is 37.0 mm (1.46 in). Intake valve duration is 272°, valve lift is 10.1 mm, and exhaust valve duration is 248°, valve lift is 9.7 mm.
|Cylinder head (86 and later)|
|Valve Arrangement:||SOHC, chain drive|
|Valves:||8 (2 valves per cylinder)|
|Valve head diameter:||INTAKE||45.0 mm (1.7717 in)|
|EXHAUST||37.0 mm (1.4567 in)|
|Valve length:||INTAKE||113.5 mm (4.4685 in)|
|EXHAUST||112.4 mm (4.4252 in)|
|Valve stem diameter:||INTAKE||7.970-7.985 mm (0.3138-0.3144 in)|
|EXHAUST||7.965-7.980 mm (0.3136-0.3142 in)|
|Valve spring free length:||48.5 mm (1.9094 in)|
|Camshaft cam height:||INTAKE||42.63-42.72 mm (1.6783-1.6819 in)|
|EXHAUST||42.69-42.78 mm (1.6807-1.6842 in)|
|Camshaft journal diameter:||32.98-33.00 mm (1.2984-1.2992 in)|
Head tightening procedure and torque specs:
- 78 Nm, 8.0 kg·m; 58 ft·lb
|Intake valve||0.20 mm (0.008 in)|
|Exhaust valve||0.30 mm (0.012 in)|
|Standard||12.0 kg/cm2 / 200 rpm|
|Minimun||10.0 kg/cm2 / 200 rpm|
|Compression differential limit between cylinders||1.0 kg/cm2 / 200 rpm|
|Oil consumption , L/1000 km (qt. per miles)||up to 0.5 (1 qt. per 1200 miles)|
|Recommended engine oil||5W-30, 10W-30|
|Oil type API||SF or SF/CC|
|Engine oil capacity (Refill capacity)||
With filter change ~ 4.2 l l
Without filter change ~ 3.8 l
|Oil change interval, km (miles)||10,000 (6,000)|
|Spark plug||NGK: BPR5EY
|Spark plug gap||0.8 mm (0.0315 in)|
|Toyota Land Cruiser||1984-1989|
We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.
I would just like to know if there is a difference between the carburetor on a 21r and the carburetor on a 22r
I just picked up a sweet rebuilt 22re engine from 22rebuilder.com. Kinda rad old hippy dude but you can tell he knows his stuff and it was the best price I could find anywhere, even with shipping…!
Norman i would like the name of that builder and price..?
I had a 22R (carbureted). Put 360k on it before the head gasket blew. Replaced the engine with a very low miles engine. Ran great. 10,000 miles into the replacement engine, the truck was rear ended and totaled.
Great truck. Wish I still had it.
Could REALLY use picture(s) detailing the emission vacuum lines routing.