The Toyota 3T is a 1.8 liter (1,770 cc, 108.0 cu-in) straight-four, four-stroke carburetor gasoline engine from Toyota T-family. TheToyota 3T engine was produced from 1977 through 1985.
This engine used OHV (overhead valve) design with two valves per cylinder (8 valves in total), cast-iron cylinder block and an aluminium cylinder head with hardened valve seats and a hemispherical combustion chamber design (HEMI). The 3T engine utilizes a timing chain.
Bore and stroke are 85.0 mm (3.35 in) and 78.0 mm (3.07 in), respectively.
The 3T engine was available in different variants:
- The 3T-C with emission control system.
- The 3T-U with Toyota Total Clean System (TTC-C)
- The 3T-EU with EFI sysytem and Toyota Total Clean System (TTC-C).
The Toyota 3T engine output ranges from 71 PS (52 kW, 70 HP) to 106 PS (78 kW, 105 HP) of horsepower and from 126 Nm (12.8 kg·m; 93 ft·lb) to 162 Nm (16.5 kg·m; 119.6 ft·lb) of torque between the California 3T-C and JDM-spec fuel-injected 3T-EU.
The breakdown of the engine code is as follows:
- 3 – 3nd generation engine
- T – Engine family
General information
| Engine Specifications | |
| Engine code | 3T |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline |
| Production | 1977-1985 |
| Displacement | 1.8 L, 1,770 cm3 (108.0 cu in) |
| Fuel system | Carburetor or EFI |
| Power adder | None |
| Max. horsepower | From 71 PS (52 kW, 70 HP) to 106 PS (78 kW, 105 HP) |
| Max. torque | From 126 Nm (12.8 kg·m; 93 ft·lb) to 162 Nm (16.5 kg·m; 119.6 ft·lb) |
| Firing order | 1-3-4-2 |
| Dimensions (L x H x W): | – |
| Weight | – |
Cylinder block
The Toyota 3T motor has a cast-iron cylinder block with three main bearings supported system. The 2T engine cylinder bore is 85.0 mm (3.35 in) and the piston stroke is 78.0 mm (3.07 in), compression ratio rating of 9.0:1.
The pistons are each fitted with two compression rings and a single oil ring.
| Cylinder block | ||
| Cylinder block alloy | Cast iron | |
| Compression ratio: | 9.0:1 | |
| Cylinder bore: | 85.0 mm (3.35 in) | |
| Piston stroke: | 78.0 mm (3.07 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 3 | |
| Cylinder inner diameter (standard): | 85.000-85.050 mm (3.3460-3.3480 in) | |
| Piston skirt diameter (standard): | 84.940-84.990 mm (3.3440-3.3460 in) | |
| Piston ring side clearance: | Top | 0.020-0.060 mm (0.0008-0.0024 in) |
| Second | 0.015-0.055 mm (0.0006-0.0022 in) | |
| Oil | 0.015-0.060 mm (0.0006-0.0024 in) | |
| Piston ring end gap: | Top | 0.250-0.560 mm (0.0098-0.022 in) |
| Second | 0.200-0.510 mm (0.0079-0.0201 in) | |
| Oil | 0.300-0.780 mm (0.0118-0.0307 in) | |
| Crankshaft main journal diameter: | 57.976-58.000 mm (2.2825-2.2835 in) | |
| Crankpin diameter: | 47.976-48.000 mm (1.8888-1.8898 in) | |
Main bearing cap bolts tightening procedure and torque specs:
- 60-80 Nm; 6.5-8.5 kg·m; 47-61 ft·lb
After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
Connecting rod bearing bolts
- 40-50 Nm; 4.0-5.0 kg·m; 30-36 ft·lb
Cylinder head
| Cylinder head | ||
| Cylinder head alloy | Aluminum | |
| Valve Arrangement: | OHV | |
| Valves: | 8 (2 valves per cylinder) | |
| Valve length: | INTAKE | 109.0 mm (4.2913 in) |
| EXHAUST | 108.5 mm (4.2716 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: | INTAKE | 42.1 mm (1.6575 in) |
| EXHAUST | 42.1 mm (1.6575 in) | |
| Camshaft lobe height: | INTAKE | 38.360-38.460 mm (1.5102-1.5142 in) |
| EXHAUST | 38.250-38.350 mm (1.5059-1.5098 in) | |
Maintenance data
| Valve clearance (Hot) | |
| Intake valve | 0.20 mm (0.008 in) |
| Exhaust valve | 0.33 mm (0.013 in) |
| Valve clearance (Cold) | |
| Intake valve | 0.18 mm (0.007 in) |
| Exhaust valve | 0.30 mm (0.012 in) |
| Compression pressure | |
| Standard | 11.5 kg/cm2 (163 psi) / 250 rpm |
| Minimun | 9.0 kg/cm2 (128 psi) / 250 rpm |
| Oil system | |
| Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil | 10W-30 |
| Oil type API | SE |
| Engine oil capacity (Refill capacity) | With oil filter: 3.8 l (4.0 US qt, 3.3 Imp qt) Without oil filter: 3.3 l (3.5 US qt, 2.9 Imp qt) | Ignition system |
| Spark plug | NGK: BPR5EA, BPR5ES DENSO: W14EXR-U, W16EXR-U |
| Spark plug gap | 0.8 mm (0.0315 in) or 1.1 mm (0.0433 in) |
| Spark plug tightening torque | 18 Nm (1.8 kg⋅m, 13 ft⋅lb) |
Vehicle applications
| Model | Years Produced |
| 3T-C | |
| Toyota Corolla (TE72L / 72R) | – |
| 3T-U | |
| Toyota Corona (TT121) | – |
| Toyota Mark II (TX30) | – |
| Toyota Chaser (TX30) | – |
| 3T-EU | |
| Toyota Corona 1800 SL (TT132) | – |
| Toyota Celica Camry 1800 SX (TA57) | – |
| Toyota Corona (TT142) | – |
| Toyota Celica | – |
| Toyota Carina 1800 ST EFI (TA62) | – |
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