Toyota 1C

Toyota 1CThe Toyota 1C is a 1.8 L (1,839 cc, 112.2 cu·in) four-cylinders, four-stroke cycle water-cooled naturally aspirated internal combustion diesel engine, from the Toyota C-family, manufactured by the Toyota Motor Corporation from 1981 to 1992.

The 1C diesel engine has a cast-iron cylinder block with 83.0 mm (3.27 in) cylinder bores and an 85.0 mm (3.35 in) piston stroke. Compression ratio rating is 23:1. The Toyota 1C engine has a cylinder head with a single overhead camshaft (SOHC) and 2 valves per cylinder (12 in total).

This engine was available in the following modifications:

  • 1C is a longitudinally mounted engine. This engine produced 65 PS (48 kW; 64 HP) at 4,700 rpm of horsepower and 118 N·m (12 kg·m, 87 ft·lb) at 2,700 rpm of torque.
  • 1C-L is a transversely mounted version of the 1C.
  • 1C-TL is a turbocherged version was installed in the Toyota Camry and Vista. It produces 73 PS (54 KW; 72 HP) at 4,500 rpm of output power and 145 Nm (14.8 kg·m; 107.0 ft·lb) at 2,600 rpm of torque.

The breakdown of the engine code is as follows:

  • 1 – 1-st generation engine
  • C – Engine family

General information

Engine Specifications
Engine code1C
LayoutStraight-4, vertical
Fuel typeDiesel
Production1981-1992
Displacement1.8 L, 1,839 cc (112.2 cu in)
Injection pumpMechanical
Power adderNone
Horsepower net 1C:: 65 PS (48 kW; 64 HP) at 4,700 rpm
1C-TL: 73 PS (54 KW; 72 HP) at 4,500 rpm
Torque output 1C:: 118 N·m (12.0 kg·m, 87.0 ft·lb) at 2,700 rpm
1C-TL: 145 Nm (14.8 kg·m; 107.0 ft·lb) at 2,600 rpm
Firing order1-3-4-2
Dimensions (L x H x W):
Weight

Cylinder block

The cylinder block is made of cast iron. The crankshaft is supported by 5 bearings. Cylinder bore and piston stroke are 83.0 mm (3.27 in) and 85.0 mm (3.35 in), respectively. Compression ratio rating is 23:1.

Cylinder block
Cylinder block alloyCast-iron
Compression ratio:23:1
Cylinder bore:83.0 mm (3.27 in)
Piston stroke:85.0 mm (3.35 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Cylinder bore inner diameter:83.000-83.030 mm (3.2677-3.2689 in)
Piston skirt diameter82.950-82.980 mm (3.2657-3.2669 in)
Piston ring end gap:Top0.270-0.540 mm (0.0106-0.0213 in)
Second0.250-0.520 mm (0.0098-0.0205 in)
Oil0.200-0.820 mm (0.0079-0.0323 in)
Piston pin outer diameter27.000-27.012 mm (1.063-1.0635 in))
Connecting rod small end diameter (standard):27.011-27.023 mm (1.0634-1.0639 in)
Crankshaft main journal diameter:56.985-57.000 mm (2.2435-2.2441 in)
Crankpin diameter:50.488-50.500 mm (1.9877-1.9882 in)
Crankshaft center distance:42.5 mm (1.675 in)

Main bearing cap 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 nut

  • 64 Nm; 6.5 kg·m; 47 ft·lb

Crankshaft pulley bolt

  • 98 Nm; 10.0 kg·m; 72 ft·lb

Drive plate (A/T) fixing bolts

  • 74 Nm; 7.5 kg·m; 54 ft·lb

Flywheel (M/T) fixing bolts

  • 88 Nm; 9.0 kg·m; 65 ft·lb

Cylinder head

Cylinder head
Cylinder head alloyCast iron
Valve Arrangement:SOHC
Valves:8 (2 valves per cylinder)
Intake valves diameter:
Exhaust valves diameter:
Intake valves length:105.70 mm (4.1614 in)
Exhaust valves length:105.35 mm (4.1476 in)
Intake valve stem diameter:7.975-7.990 mm (0.314-0.3146 in)
Exhaust valves stem diameter:7.960-7.975 mm (0.3134-0.314 in)
Valve spring free length:47.5 mm (1.8701 in)
Camshaft journal diameter:27.979-27.995 mm (1.1015-1.1022 in)
Camshaft lobe height (intake):46.725-46.875 mm (1.8396-1.8455 in)
Camshaft lobe height (exhaust):47.335-47.485 mm (1.8636-1.8695 in)

Head tightening procedure and torque specs:

  • Step 1: 44 Nm; 4.5 kg·m; 33 ft·lb
  • Step 2: Turn all bolts 90°
  • Step 3: Turn all bolts another 90°

Maintenance data

Valve clearance (Hot)
Intake valve0.20-0.30 mm (0.0079-0.0118 in)
Exhaust valve0.25-0.35 mm (0.0098-0.0138 in)
Compression pressure
Standard30.0 kg/m2 (2,942 kPa, 427 psi)
Minimun25.0 kg/m2 (2,452 kPa, 356 psi)
Compression differential limit between cylinders5.0 kg/m2 (490 kPa, 71 psi)
Oil system
Recommended engine oil10W-30 or 5W-30 (“CC”, “CD”)
Engine oil capacity Dry fill: 4.8-5.3 L (4.5-5.6 US qt, 3.8-4.7 Imp. qt)
With oil filter change: 4.3-4.5 L (4.5-4.8 US qt, 3.8-4.0 Imp. qt)
Without oil filter change: 3.8 L (4.0 US qt, 3.0 Imp. qt)
Oil pressure: At idle: 0.3 kg/m2 (29 kPa, 4.3 psi) or more
At 3,00 rpm: 2.5-6.0 kg/m2 (245-588 kPa, 36-85 psi)

Vehicle applications

ModelYears Produced
Toyota Carina (CA60/67)1982-1988
Toyota Corolla (CE70/71/72/80/90/96/97)1982-1992
Toyota Corona (CT140/147 )1982-1987
Toyota LiteAce / TownAce (CM20/25/35/CM50/CR26)1982-1989
Toyota Sprinter (CE70/80/90/96/97)1982-1991
1C-TL
Toyota Camry
Toyota Vista
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