The Toyota 1E (1E-L) is a 1.0 l (999 cc, 60.96 cu-in) straight-four 4-stroke natural aspirated gasoline engine from Toyota E-family.
The 1E engine features a cast-iron block and aluminum cylinder head with the single overhead camshaft (SOHC) and three valves per cylinder (12 in total). Compression ratio rating is 9.1:1. It has a 70.5 mm (2.78 in) cylinder bore and 64.0 mm (2.52 in) piston stroke. The Toyota 1E engine has a carburetor fuel system and ignition system with a distributor.
The engine produced 55.8 PS (41 kW; 55 HP) at 6,000 rpm of maximum horsepower and 75 N·m (7.6 kg·m, 55.3 ft·lb) at 3,800 rpm of peak torque.
The breakdown of the engine code is as follows:
- 1 – 1-st generation engine
- E – Engine family
General information
| Engine Specifications | |
| Engine code | 1E, 1E-L |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline (petrol) |
| Production | – |
| Displacement | 1.0 L, 999 cm3 (60.96 cu-in) |
| Fuel system | Carburetor (Type K) |
| Power adder | None |
| Power output |
55.8 PS (41 kW; 55 HP) at 6,000 rpm |
| Torque output | 75 N·m (7.6 kg·m, 55.3 ft·lb) at 3,800 rpm |
| Firing order | 1-3-4-2 |
| Dimensions (L x W x H): | – |
| Weight | – |
Cylinder block
The Toyota 1E has a cast-iron cylinder block with five bearing support system. It has a 70.5 mm (2.78 in) cylinder bore and 64.0 mm (2.52 in) piston stroke. Compression ratio rating is 9.1:1.
| Cylinder block | ||
| Cylinder block alloy | Cast-iron | |
| Compression ratio: | 9.1:1 | |
| Cylinder bore: | 70.5 mm (2.78 in) | |
| Piston stroke: | 64.0 mm (2.52 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter (standard): | 70.500 mm (2.7756 in) | |
| Piston skirt diameter (standard): | 70.410-70.440 mm (2.772-2.7732 in) | |
| Piston pin outer diameter: | – | |
| Piston ring side clearance: | Top | 0.040-0.080 mm (0.0016-0.0031 in) |
| Second | 0.030-0.070 mm (0.0012-0.0028 in) | |
| Piston ring end gap: | Top | 0.260-0.490 mm (0.0102-0.0193 in) |
| Second | 0.150-0.430 mm (0.0059-0.0169 in) | |
| Oil | 0.200-0.830 mm (0.0079-0.0327 in) | |
| Crankshaft journal diameter: | 47.000 mm (1.8504 in) | |
| Crankpin diameter: | 40.000 mm (1.5748 in) | |
Main bearing cap bolts tightening procedure and torque specs:
- 57 Nm, 5.8 kg·m; 42 ft·lb)
After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
Connecting rod bearing bolts
- 39 Nm, 4.0 kg·m; 29 ft·lb)
Cylinder head
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 belt and three valves per cylinder (12 valves in total). The 1E engine used special valve shims to adjust the valve clearance.
| Cylinder head | ||
| Valve Arrangement: | SOHC, belt drive | |
| Valves: | 12 (3 valves per cylinder) | |
| Valve head diameter: | INTAKE | – |
| EXHAUST | – | |
| Valve length: | INTAKE (First) | 92.26 mm (3.6323 in) |
| INTAKE (Second) | 98.50 mm (3.8779 in) | |
| EXHAUST | 92.26 mm (3.6323 in) | |
| Valve stem diameter: | INTAKE | 5.970-5.985 mm (0.2350-0.2356 in) |
| EXHAUST | 5.965-5.980 mm (0.2348-0.2354 in.) | |
| Valve spring free length: | 41.52 mm (1.6346 in) | |
| Camshaft cam height: | INTAKE (First) | 35.87-35.97 mm (1.4122-1.4161 in) |
| INTAKE (Second) | 35.38-35.48 mm (1.3929-1.3968 in) | |
| EXHAUST | 35.83-35.93 mm (1.4106-1.4146 in) | |
| Outer camshaft journal diameter: | 26.979-26.995 mm (1.0622-1.0628 in) | |
Head tightening procedure and torque specs:
- Step 1: 29 Nm, 3.0 kg·m; 21.4 ft·lb
- Step 1: 49 Nm, 5.0 kg·m; 36.16 ft·lb
- Step 2: Turn all bolts 90°
Maintenance data
| Valve clearance | |
| Intake valve | 0.20 mm (0.008 in) |
| Exhaust valve | 0.20 mm (0.08 in) |
| Compression pressure | |
| Standard | 12.0 kg/m2 / 200 rpm |
| Minimun | 10.0 kg/m2 / 200 rpm |
| Compression differential limit between cylinders | 1.0 kg/m2 / 200 rpm |
| Oil system | |
| Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil | 5W-20, 5W-30, 10W-30 |
| Oil type API | SE, SF or SG |
| Engine oil capacity (Refill capacity) |
With filter change 3.2 l l Without filter change 2.9 l |
| Oil change interval, km (miles) | 10,000 (6,000) |
| Ignition system | |
| Spark plug | NGK: BPR6EY-11 DENSO: W20EXR-U11 |
| Spark plug gap | 0.8 mm (0.0315 in) |
Vehicle applications
| Model | Years Produced |
| Toyota Starlet (P70 EP70, EP80) | – |
Author:
This infomoration has been very helpfull as i have a 1e engine my first time replacing parts in engine i dont have a service manual just going off you tube but have been unable to find out what is the torque on the camshaft bolts
Many Thanks
Tania