The Toyota 7M-GTE is a 3.0 L (2,954 cc, 180.26 cu·in) straight-six, four-stroke cycle turbocharged gasoline engine from the Toyota M-family. The engine was manufactured by the Toyota Motor Corporation from 1986 to 1992. The Toyota 7M-GTE was top performance engine until it was replaced by the 1JZ-GTE.
The Toyota 7M-GTE 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-7M-GTE is equipped with an electronic fuel injection system and a turbocharger with 5 psi (0.34 bar). It has an 83.0 mm (3.27 in) cylinder bore and 91.0 mm (3.58 in) piston stroke. Compression ratio rating is 8.4:1.
The 7M-GTE engine produced 235 PS (173 kW; 232 HP) at 5,600 rpm of maximum horsepower and 344 N·m (35.1 kg·m, 253.5 ft·lb) at 4,000 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
- T – Turobchagered
- E – Multi-Point Fuel Injection
General information
| Engine Specifications | |
| Engine code | 7M-GTE |
| 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 | Turbocharger with 5 psi (0.34 bar) |
| Max. horsepower | 235 PS (173 kW; 232 HP) at 5,600 rpm |
| Max. torque | 344 N·m (35.1 kg·m, 253.5 ft·lb) at 4,000 rpm |
| Firing order | 1-5-3-6-2-4 |
| Dimensions (L x H x W): | – |
| Weight | 210 kg (463 lbs) |
Cylinder block
The Toyota 7M-GTE 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 8.4:1.
| Cylinder block | ||
| Cylinder block alloy | Cast-iron | |
| Compression ratio: | 8.4:1 | |
| 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): | 82.910-82.960 mm (3.2642-3.2661 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 | 0.290-0.440 mm (0.0114-0.0173 in) |
| Second | 0.250-0.530 mm (0.0098-0.0209 in) | |
| Oil | 0.100-0.440 mm (0.0039-0.0173 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 | 32.0 mm (1.2598 in) |
| EXHAUST | 27.5 mm (1.0629 in) | |
| 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 | 38.85 mm (1.5295 in) |
| EXHAUST | 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 | 10.0 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 |
Platinum tipped type: DENSO: PQ20R-P8; NGK: BCPR6EP-N8 |
| Spark plug gap | 0.8 mm (0.0315 in) |
| Spark plug torque | 18 N·m (1.8 kg·m, 13.3 ft·lb) |
Vehicle applications
| Model | Years Produced |
| Toyota Supra (MA70) | 1986–1992 |
| Toyota Soarer (MZ20/MZ21) | 1986–1991 |
Author:
valve size?
Intake: 32.0 mm
Exhaust: 27.5 mm
Please note that this engine is prone to OEM head gasket failure due to low factory cylinder head torque specs. Current community recommendation is 72 ft/lbs. To completely fix this fault community recommendation is to resurface the block and head and fit with an aftermarket multi-layer steel (MLS) or metal head gasket as was done from the factory with the later JZ engines.
Thank you for your comment!
Hello, What about the USA & Japan Spec 7M-GE & 7M-GTE throttle body & intake piping size & header / downpipe diameter & cat-back size diameter in mm?