The Toyota 7M-GE is a 3.0 L (2,954 cc, 180.26 cu·in) straight-six, four-stroke cycle natural aspirated gasoline engine from the Toyota M-family. The engine was manufactured by the Toyota Motor Corporation from 1986 to 1992.
The Toyota 7M-GE engine features a cast-iron block, aluminum cylinder head with dual belt-driven overhead camshafts and four valves per cylinder (24 in total). The 7M-GE is equipped with an electronic fuel injection system. It has an 83.0 mm (3.27 in) cylinder bore and 91.0 mm (3.58 in) piston stroke. Compression ratio rating is 9.1:1.
This engine produced from 193 PS (142 kW; 190 HP) at 6,000 rpm to 207 PS (152 kW; 204 HP) at 6,000 rpm of horsepower and from 250 N·m (25.5 kg·m, 184.3 ft·lb) at 4,800 rpm to 265 N·m (27 kg·m, 195.3 ft·lb) at 4,800 rpm of peak torque.
The breakdown of the engine code is as follows:
- 7 – 7 generation engine
- M – Engine family
- G – Performance wide-angle DOHC
- E – Multi-Point Fuel Injection
General information
| Engine Specifications | |
| Engine code | 7M-GE |
| Layout | Four stroke, Inline-6 (Straight-6) |
| Fuel type | Gasoline |
| Production | 1986-1992 |
| Displacement | 3.0 L, 2,954 cm3 (180.26 cu in) |
| Fuel system | Multi-point fuel injection system |
| Power adder | None |
| Max. horsepower |
From 193 PS (142 kW; 190 HP) at 6,000 rpm to 207 PS (152 kW; 204 HP) at 6,000 rpm |
| Max. torque |
From 250 N·m (25.5 kg·m, 184.3 ft·lb) at 4,800 rpm to 265 N·m (27 kg·m, 195.3 ft·lb) at 4,800 rpm |
| Firing order | 1-5-3-6-2-4 |
| Dimensions (L x H x W): | – |
| Weight | 199 kg (438.7 lbs) |
Cylinder block
The Toyota 7M-GE engine has a cast-iron cylinder block, bore is 83.0 mm (3.27 in) and the piston stroke is 91.0 mm (3.58 in). The cylinder block, a monoblock specially cast structure, employs the seven bearing support system. The crankshaft has seven journals.
The pistons are aluminum casting. Each piston is fitted with two compression rings and a single oil ring. Compression ratio rating is 9.1:1
| Cylinder block | ||
| Cylinder block alloy | Cast-iron | |
| Compression ratio: | 9.1:1 | |
| Cylinder bore: | 83.0 mm (3.27 in) | |
| Piston stroke: | 91.0 mm (3.58 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 7 | |
| Cylinder inner diameter (standard): | 82.990-83.040 mm (3.2673-3.2693 in) | |
| Piston skirt diameter (standard): | 82.900-82.950 mm (3.2638-3.2657 in) | |
| Piston pin outer diameter: | 21.996-22.009 mm (0.866-0.8665 in) | |
| Piston ring side clearance: | Top | 0.030-0.070 mm (0.0012-0.0028 in) |
| Second | 0.020-0.060 mm (0.0008-0.0024 in) | |
| Piston ring end gap: | Top |
Without TWC: 0.290-0.440 mm (0.0114-0.0173 in) With TWC: 0.230-0.380 mm (0.0091-0.0150 in) |
| Second |
Without TWC: 0.250-0.530 mm (0.0098-0.0209 in) With TWC: 0.290-0.440 mm (0.0114-0.0173 in) |
|
| Oil |
Without TWC: 0.100-0.440 mm (0.0039-0.0173 in) With TWC: 0.290-0.440 mm (0.0114-0.0173 in) |
|
| Crankshaft main journal diameter: | 60.007-60.012 mm (2.3625-2.3627 in) | |
| Crankpin diameter: | 51.993-52.000 mm (2.047-2.0472 in) | |
Main bearing cap bolts torque specs:
- 102 Nm; 10.4 kg·m; 75 ft·lb
Connecting rods cap bolts torque specs:
- 64 Nm 6.5 kg·m; 47 ft·lb
Flywheel / Drive plate bolt torque specs:
- 74 Nm 7.5 kg·m; 54 ft·lb
Cylinder head
The cylinder head is made of a light, strong aluminum alloy with good cooling efficiency. Camshafts are made of specially cast steel and are driven by a timing belt.
| Cylinder head alloy: | Aluminum | |
| Valve Arrangement: | DOHC, belt drive | |
| Valves: | 24 (4 valves per cylinder) | |
| Intake duration: | – | |
| Exhaust duration: | – | |
| Valve head diameter: | INTAKE | – |
| EXHAUST | – | |
| Valve length: | INTAKE | 98.15 mm (3.8642 in) |
| EXHAUST | 98.15 mm (3.8642 in) | |
| Valve stem diameter: | INTAKE | 5.970-5.985 mm (0.235-0.2356 in) |
| EXHAUST | 5.965-5.980 mm (0.2348-0.2354 in) | |
| Valve spring free length: | 41.64 mm (1.6394 in) | |
| Camshaft lobe height: | INTAKE |
MA: 38.36 mm (1.5102 in) MS: 38.16 mm (1.5024 in) |
| EXHAUST |
MA: 38.36 mm (1.5102 in) MS: 38.35 mm (1.5098 in) |
|
| Camshaft journal diameter: | №1 | 26.949-26.965 mm (1.061-1.0616 in) |
| №2-7 | 26.888-26.975 mm (1.0586-1.062 in) | |
Cylinder head torque specs:
- 78 Nm; 8.0 kg·m; 58 ft·lb
Maintenance data
| Valve clearance (Cold) | |
| Intake valve (COLD) | 0.15-0.25 mm (0.006-0.0100 in) |
| Exhaust valve (COLD) | 0.20-0.30 mm (0.0079-0.0188 in) |
| Compression pressure | |
| Standard | 11.0 kg/cm2 / 300 rpm |
| Minimun | 9.0 kg/cm2 / 300 rpm |
| Oil system | |
| Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil |
5W-30 5W-40 10W-30 |
| Oil type API | SE, SF or better |
| Engine oil capacity (Refill capacity) |
Without oil filter: 3.9-4.2 l (4.1-4.4 US qts, 3.4-3.7 Imp qts) With oil filter: 4.2-4.4 l (4.4-4.7 US qts, 3.7-3.9 Imp qts) |
| Oil change interval, km (miles) | 10,000 (6,000) |
| Ignition system | |
| Spark plug |
Conventional tipped type: DENSO: Q20R-U; NGK: BCPR6EY Platinum tipped type: |
| Spark plug gap |
Conventional tipped type: 0.8 mm (0.0315 in) Platinum tipped type: 1.1 mm (0.043 in) |
| Spark plug torque | 18 N·m (1.8 kg·m, 13.3 ft·lb) |
Vehicle applications
| Model | Years Produced |
| Toyota Supra MkIII (MA70) | 1986–1992 |
| Toyota Cressida Mark II (MX83) | 1989–1992 |
| Toyota Chaser | – |
| Toyota Crown | – |
| Toyota Cressida 3.0i Twincam | – |
Author:
Be the first to comment