Toyota 1E

Toyota 1EThe 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 code1E, 1E-L
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline (petrol)
Displacement1.0 L, 999 cm3 (60.96 cu-in)
Fuel systemCarburetor (Type K)
Power adderNone
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 order1-3-4-2
Dimensions (L x W x H):

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 alloyCast-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:Top0.040-0.080 mm (0.0016-0.0031 in)
Second0.030-0.070 mm (0.0012-0.0028 in)
Piston ring end gap:Top0.260-0.490 mm (0.0102-0.0193 in)
Second0.150-0.430 mm (0.0059-0.0169 in)
Oil0.200-0.830 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
Valve length:INTAKE (First)92.26 mm (3.6323 in)
INTAKE (Second)98.50 mm (3.8779 in)
EXHAUST92.26 mm (3.6323 in)
Valve stem diameter:INTAKE5.970-5.985 mm (0.2350-0.2356 in)
EXHAUST5.965-5.980 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)
EXHAUST35.83-35.93 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 valve0.20 mm (0.008 in)
Exhaust valve0.20 mm (0.08 in)
Compression pressure
Standard12.0 kg/m2 / 200 rpm
Minimun10.0 kg/m2 / 200 rpm
Compression differential limit between cylinders1.0 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 oil5W-20, 5W-30, 10W-30
Oil type APISE, 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 plugNGK: BPR6EY-11
Spark plug gap0.8 mm (0.0315 in)

Vehicle applications

ModelYears Produced
Toyota Starlet (P70 EP70, EP80)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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1 Comment

  1. 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

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