Toyota M engine
Encyclopedia
Toyota Motor Corporation
's M family of engines were a longitudinally mounted straight-6
engine design. They were used from the 1960s through the 1990s. All M family engines were OHC designs. While the M family was born with a chain-driven single camshaft
it evolved into a belt drive DOHC system after 1980. All M family engines used a cast-iron block with an aluminum cylinder head
. The Japanese market only M-E was the first Toyota engine to be equipped with fuel injection
(at the same time as the 4 cylinder 18R-E). The 4M-E was the first Toyota engine to be equipped with fuel injection
for non-Japanese markets. The M family were Toyota's most prestigious engines (apart from the uncommon V family
V8) for 30 years. They were commonly found on the large Toyota Crown
, Cressida
, Celica Supra
, and Supra
models.
An LPG
version, the M-LPG, was produced from 1966 through 1988.
Twin SU sidedraft carburetor
s pushed output for the M-B and M-D to 129 hp.
Anti emissions versions, the M-U, M-U LPG and M-EU, replaced the M, M-LPG and M-E on the Japanese market in mid 1976.
Applications:
The M-E was redesignated as the M-EU for the Japanese market in December 1976 when it received a catalytic converter to meet anti-emissions laws
Applications:
T-03 turbo.
In 1983, Toyota added an air/water intercooler
to the M-TEU. Output was bumped to 160 hp (119 kW) at 5600 rpm and 170 ft·lbf (230 Nm) at 3000 rpm.
Applications:
Applications:
Another 2.0 L (1988 cc) inline 6 engine, the 2-valve DOHC 3M, was produced from 1966 through 1971. This special engine shared the original M's block but featured an aluminum sump, a special Yamaha-designed aluminum head with wide 79° valves and a hemispherical shape. It powered the Yamaha/Toyota 2000GT
, which 'Import Tuner' magazine has described as "the first true original Japanese supercar". Output was 150 bhp at 6600 rpm and 18 kgm at 5000 rpm.
Applications:
The fuel injected 4M-E was produced from 1978 through 1980. It was also a 2-valve SOHC engine. Output was 110 hp (82 kW) at 4800 rpm and 136 ft·lbf (184 Nm) at 2400 rpm.
Applications:
versions were made, it is the fuel injected DOHC 5M-GE that is the most common.
The SOHC engine produced just 116 hp (87 kW) at 4800 rpm and 145 ft·lbf (196 Nm) at 3600 rpm.
In Australia the 5M-E (in 1985) was just 103 kW at 4800 rpm and 226 Nm at 3600 rpm due to the leaded petrol at the time.
In Europe the 5M-E produced 145PS/ 107kW in the Crown MS112 and the Celica Supra MA61.
Applications:
and Toyota Cressida
of the 1980s. It was quite different from any previous member of the M family, with Bosch
L Jetronic
-derived electronic fuel injection
(using an AFM intake measuring scheme), wide-angle valves, and belt-driven dual camshaft
s. It used hydraulic valve lifters, a first for Toyota. The use of rocker arms and valve lash adjusters eliminated the need for valve clearance maintenance, a world first for any twin cam engine. This version of the M made its US debut in 1982's Toyota Celica Supra MK2. The 1982 version had a vacuum-advance distributor, whereas the 1983-1988 versions found in the Celica Supra and Cressida had full electronic control of the ignition system and distributor. The newer engine control system found in these later cars was named TCCS, or Toyota Computer Control System and, together with different intake runners, increased max power by 5 PS from August 1983.
Output ranged from 145 to 175 hp (108 and 130 kW respectively), depending on exhaust system, emissions controls, compression ratio, intake runner shape (earlier models had round intake runners and later models had D-shaped intake runners), and ECU tuning.
There were aftermarket crank and piston kits offered for the 5M-GE that took the displacement up to 2.9 L (for 230 hp/171 kW) and 3.1 L (for 250 hp/186 kW). Outfitted with kits like the Kuwahara 3100, these engines were often used quite successfully in powerboat racing in the mid 1980s.
Specifications:
Applications:
Differences between years on US model of the Celica Supra:
, as the 1986-1989 7M-GE engines; this fact is witnessed by the designation "6M" stamped on the counterweight of the crank on the earlier 1986-1988 7M engines.
Output was 170-190 hp (127-142 kW) at 5600 rpm and 170-192 ft·lbf (230-260 Nm) at 4400 rpm. The 6M-GEU is usually the lower powered variant of 6M engines, due to more restrictive exhaust and increased emissions-control hardware. Even though it was never offered in US-market vehicles, it is sometimes imported from countries where it was available and transplanted into US-market Celica Supras and MX63 and MX73 Cressidas, since it is externally identical to the 5M-GE.
Applications:
The 7M-GE was produced from 1986 through 1992. Output was 190-204 hp (142-152 kW) at 6000 rpm and 185-196 ft·lbf (250-265 Nm) at 4800 rpm.
Notwithstanding the powerful output of the engine, it was plagued with the problem of regularly blowing head gaskets due to improper torque specifications of the head bolts from the factory. The 7M-GTE turbo version suffered from the same problem. Permanent fixes typically involved a metal after-market head gasket, higher torque settings (usually 70-80 ft·lbf) and upgrading to head studs (through the ubiquitous ARP and their hardware) rather than bolts.
Specifications:
Applications:
A special 7M-GTEU version, with a modified CT26 high-flow turbocharger and large volume intercooler, pushed output to 267 hp at 5600 rpm and 264 ft·lb (358 N·m) at 4400 rpm. This was used only in the racing homologation Toyota Supra Turbo A road and race cars. The Turbo A models also measured air based on manifold pressure rather than using an air flow meter, had a larger intercooler, larger throttle body, optimized CT-26 turbo, and various other differences. It was the fastest Japanese car at the time.
The 7M-GTE was known to suffer from blown head gaskets due to improper torque specifications of the head bolts from the factory. Despite endless claims to this problem and obvious proof of a design error, Toyota never took responsibility or issued a recall. This problem could easily be prevented by the backyard mechanic by removing the valve cover and re-torquing the head bolts to a higher torque specification. It is recommended to replace the head gasket and torque the head bolts to 75 lbs.
Specifications:
Applications:
Toyota Motor Corporation
, , , commonly known simply as Toyota and abbreviated as TMC, is a multinational automaker headquartered in Toyota, Aichi, Japan. In 2010, Toyota Motor Corporation employed 317,734 people worldwide, and was the world's largest automobile manufacturer by production.The company was founded by...
's M family of engines were a longitudinally mounted straight-6
Straight-6
The straight-six engine or inline-six engine is a six-cylinder internal combustion engine with all six cylinders mounted in a straight line along the crankcase...
engine design. They were used from the 1960s through the 1990s. All M family engines were OHC designs. While the M family was born with a chain-driven single camshaft
Camshaft
A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.-History:An early cam was built into Hellenistic water-driven automata from the 3rd century BC. The camshaft was later described in Iraq by Al-Jazari in 1206. He employed it as part of his automata,...
it evolved into a belt drive DOHC system after 1980. All M family engines used a cast-iron block with an aluminum cylinder head
Cylinder head
In an internal combustion engine, the cylinder head sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket...
. The Japanese market only M-E was the first Toyota engine to be equipped with fuel injection
Fuel injection
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
(at the same time as the 4 cylinder 18R-E). The 4M-E was the first Toyota engine to be equipped with fuel injection
Fuel injection
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
for non-Japanese markets. The M family were Toyota's most prestigious engines (apart from the uncommon V family
Toyota V engine
Toyota Motor Corporation's V family of engines were a longitudinally mounted V8 engine design. They were used from the 1960s through the 1990s. The V family engine was used in the prestigious Toyota Century. Toyota had worked with Yamaha to produce the first Japanese full aluminum alloy block engine...
V8) for 30 years. They were commonly found on the large Toyota Crown
Toyota Crown
The Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
, Cressida
Toyota Cressida
The Toyota Cressida was a mid-size sedan marketed by Toyota from December 1976 to February 1993 through four generations. It was the flagship sedan of Toyota in the United States. The same chassis with slightly different bodies was available in other countries as the Toyota Mark II, Toyota Chaser...
, Celica Supra
Toyota Supra
The Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
, and Supra
Toyota Supra
The Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
models.
M
The first M was a 2.0 L (1988 cc) version produced from 1965 through 1988. It was a 2-valve SOHC engine. Cylinder bore and stroke was square at 75 mm (2.95 in). Output was 110 hp (82 kW) at 5600 rpm and 116 ft·lbf (157 Nm) at 3800 rpm.An LPG
Autogas
Autogas is the common name for liquefied petroleum gas when it is used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators. It is a mixture of propane and butane....
version, the M-LPG, was produced from 1966 through 1988.
Twin SU sidedraft carburetor
Carburetor
A carburetor , carburettor, or carburetter is a device that blends air and fuel for an internal combustion engine. It is sometimes shortened to carb in North America and the United Kingdom....
s pushed output for the M-B and M-D to 129 hp.
Anti emissions versions, the M-U, M-U LPG and M-EU, replaced the M, M-LPG and M-E on the Japanese market in mid 1976.
Applications:
- 1962-1967 Toyota Crown
- 1972-1979 Toyota Corona Mark II X10/20/30/40
M-E
The M-E appeared in the 1972-1976 Toyota Corona Mark II LG sedan and hardtop as sold in Japan. It was not sold outside of Japan.The M-E was redesignated as the M-EU for the Japanese market in December 1976 when it received a catalytic converter to meet anti-emissions laws
Applications:
- 1972-1980 Toyota Corona Mark II L and LG sedan and hardtop
M-TEU
The turbocharged M-TEU appeared in 1980 with 145 hp (108 kW) at 5600 rpm and 156 ft·lbf (211 Nm) at 3000 rpm. It used a GarretGarrett AiResearch
Garrett AiResearch was a manufacturer of turboprop engines and turbochargers, and a pioneer in numerous aerospace technologies. It was previously known as Aircraft Tool and Supply Company, Garrett Supply Company, AiResearch Manufacturing Company, or simply AiResearch...
T-03 turbo.
In 1983, Toyota added an air/water intercooler
Intercooler
An intercooler , or charge air cooler, is an air-to-air or air-to-liquid heat exchange device used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing intake air charge density through nearly isobaric cooling, which removes...
to the M-TEU. Output was bumped to 160 hp (119 kW) at 5600 rpm and 170 ft·lbf (230 Nm) at 3000 rpm.
Applications:
- 1980 Toyota SupraToyota SupraThe Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
MA46 - 1980 Toyota SoarerToyota SoarerThe Soarer made its first appearance at the 1980 Osaka International Motor Show with the name "EX-8", and the Z10 series Toyota Soarer was produced from February 1981 to December 1985, with 2.0L, 2.8L or 3.0L DOHC I-6 variants. The first generation Soarer debuted with a rear-wheel drive...
MZ10 - 1980 Toyota CrownToyota CrownThe Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
- 1980 Toyota Corona Mark II
- 1982-1986 Toyota Celica Supra MKIIToyota SupraThe Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
(Australia/Asia)
2M
The 2-valve SOHC 2M was stroked (to 85 mm/3.35 in) for 2.3 L (2253 cc). It was produced from 1966 through 1972. Output was 109-115 hp (81-86 kW) at 5200 rpm and 117-123 ft·lbf (158-166 Nm) at 3600 rpm.Applications:
- Crown MS51S/53/55/57, MS67
- Corona Mark II MX12/22/28
- 2000GTToyota 2000GTThe Toyota 2000GT is a limited-production, front-engine, rear-wheel drive, two-seat, hardtop coupé grand tourer designed by Toyota in collaboration with Yamaha. First displayed to the public at the Tokyo Motor Show in 1965, the 2000GT was manufactured under contract by Yamaha between 1967 and...
MF12
3M
Toyota 2000GT
The Toyota 2000GT is a limited-production, front-engine, rear-wheel drive, two-seat, hardtop coupé grand tourer designed by Toyota in collaboration with Yamaha. First displayed to the public at the Tokyo Motor Show in 1965, the 2000GT was manufactured under contract by Yamaha between 1967 and...
, which 'Import Tuner' magazine has described as "the first true original Japanese supercar". Output was 150 bhp at 6600 rpm and 18 kgm at 5000 rpm.
Applications:
- Toyota 2000GTToyota 2000GTThe Toyota 2000GT is a limited-production, front-engine, rear-wheel drive, two-seat, hardtop coupé grand tourer designed by Toyota in collaboration with Yamaha. First displayed to the public at the Tokyo Motor Show in 1965, the 2000GT was manufactured under contract by Yamaha between 1967 and...
4M
The engine was bored out to 80 mm (3.15 in) to create the 2.6 L (2563 cc) 2-valve SOHC 4M. Produced from 1972 through 1980, output was 108-122 hp (81-91 kW) at 5600 rpm and 134-141 ft·lbf (181-191 Nm) at 3600 rpm.The fuel injected 4M-E was produced from 1978 through 1980. It was also a 2-valve SOHC engine. Output was 110 hp (82 kW) at 4800 rpm and 136 ft·lbf (184 Nm) at 2400 rpm.
Applications:
- 1978-1980 Toyota SupraToyota SupraThe Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
- 1974-1980 Corona Mark II/CressidaToyota CressidaThe Toyota Cressida was a mid-size sedan marketed by Toyota from December 1976 to February 1993 through four generations. It was the flagship sedan of Toyota in the United States. The same chassis with slightly different bodies was available in other countries as the Toyota Mark II, Toyota Chaser...
/ChaserToyota ChaserThe Toyota Chaser is a mid-size car produced by the Toyota Motor Company, Japan. Most were 4-door sedans, with the 2-door coupe discontinued after the first generation... - 1971-1979 Toyota CrownToyota CrownThe Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
5M
The bore was up again to 83.1 mm (3.27 inches) in the 2.8 L (2759 cc) 5M, produced from 1979 through 1988. Although 2-valve SOHC and carburetedCarburetor
A carburetor , carburettor, or carburetter is a device that blends air and fuel for an internal combustion engine. It is sometimes shortened to carb in North America and the United Kingdom....
versions were made, it is the fuel injected DOHC 5M-GE that is the most common.
The SOHC engine produced just 116 hp (87 kW) at 4800 rpm and 145 ft·lbf (196 Nm) at 3600 rpm.
In Australia the 5M-E (in 1985) was just 103 kW at 4800 rpm and 226 Nm at 3600 rpm due to the leaded petrol at the time.
In Europe the 5M-E produced 145PS/ 107kW in the Crown MS112 and the Celica Supra MA61.
Applications:
- 5M
- Toyota CrownToyota CrownThe Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
MS110
- Toyota Crown
- 5M-E
- 1980–1987 Toyota CrownToyota CrownThe Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
MS112, MS123 - 1980–1986 Toyota Celica Supra MA47, MA56, MA61
- 1980–1987 Toyota CressidaToyota CressidaThe Toyota Cressida was a mid-size sedan marketed by Toyota from December 1976 to February 1993 through four generations. It was the flagship sedan of Toyota in the United States. The same chassis with slightly different bodies was available in other countries as the Toyota Mark II, Toyota Chaser...
MX62, MX63, MX72, MX73
- 1980–1987 Toyota Crown
5M-GE
The 12-valve (2 valves per cylinder) DOHC 5M-GE is familiar as the engine of the Toyota SupraToyota Supra
The Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
and Toyota Cressida
Toyota Cressida
The Toyota Cressida was a mid-size sedan marketed by Toyota from December 1976 to February 1993 through four generations. It was the flagship sedan of Toyota in the United States. The same chassis with slightly different bodies was available in other countries as the Toyota Mark II, Toyota Chaser...
of the 1980s. It was quite different from any previous member of the M family, with Bosch
Robert Bosch GmbH
Robert Bosch GmbH is a multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world's largest supplier of automotive components...
L Jetronic
Jetronic
Jetronic is a trade name of an fuel injection technology for automotive petrol engines, developed and marketed by Robert Bosch GmbH from the 1960s onwards. Bosch licensed the concept to many automobile manufacturers. There are several variations of the technology offering technological development...
-derived electronic fuel injection
Fuel injection
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
(using an AFM intake measuring scheme), wide-angle valves, and belt-driven dual camshaft
Camshaft
A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.-History:An early cam was built into Hellenistic water-driven automata from the 3rd century BC. The camshaft was later described in Iraq by Al-Jazari in 1206. He employed it as part of his automata,...
s. It used hydraulic valve lifters, a first for Toyota. The use of rocker arms and valve lash adjusters eliminated the need for valve clearance maintenance, a world first for any twin cam engine. This version of the M made its US debut in 1982's Toyota Celica Supra MK2. The 1982 version had a vacuum-advance distributor, whereas the 1983-1988 versions found in the Celica Supra and Cressida had full electronic control of the ignition system and distributor. The newer engine control system found in these later cars was named TCCS, or Toyota Computer Control System and, together with different intake runners, increased max power by 5 PS from August 1983.
Output ranged from 145 to 175 hp (108 and 130 kW respectively), depending on exhaust system, emissions controls, compression ratio, intake runner shape (earlier models had round intake runners and later models had D-shaped intake runners), and ECU tuning.
There were aftermarket crank and piston kits offered for the 5M-GE that took the displacement up to 2.9 L (for 230 hp/171 kW) and 3.1 L (for 250 hp/186 kW). Outfitted with kits like the Kuwahara 3100, these engines were often used quite successfully in powerboat racing in the mid 1980s.
Specifications:
- Camshafts: DOHC
- Valves: 12 (2 per cylinder)
- Forced Induction: None
- Displacement: 2759 cc
- Bore: 83 mm (3.27 in)
- Stroke: 85 mm (3.35 in)
- Compression Ratio: 8.1:1 to 9.2:1
- Power: 145 hp
- Torque: 140 lbft
- Production: 1982-1988
Applications:
- 1981.07–1986 Toyota Celica XX/SupraToyota SupraThe Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
MA61 - 1982–1988 Toyota CressidaToyota CressidaThe Toyota Cressida was a mid-size sedan marketed by Toyota from December 1976 to February 1993 through four generations. It was the flagship sedan of Toyota in the United States. The same chassis with slightly different bodies was available in other countries as the Toyota Mark II, Toyota Chaser...
MX62, MX63, MX72, MX73 - 1981.08–1984.08 Toyota CrownToyota CrownThe Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
MS120 - 1981.02–? Toyota SoarerToyota SoarerThe Soarer made its first appearance at the 1980 Osaka International Motor Show with the name "EX-8", and the Z10 series Toyota Soarer was produced from February 1981 to December 1985, with 2.0L, 2.8L or 3.0L DOHC I-6 variants. The first generation Soarer debuted with a rear-wheel drive...
MZ11
Differences between years on US model of the Celica Supra:
- 1982 Supra 5M-GE had vacuum-advance distributors and 9-to-0 volt output AFMs.
- 1982-1983 Supra 5M-GE had dual V-belt accessory drive, 65 amp alternator, square-tooth camshaft belts, 8.8:1 compression ratio, shallower oil pan, and round intake runners.
- 1983-1985.5 Supra 5M-GE had 0-to-5 volt output AFM's and TCCS.
- 1984-1985.5 Supra 5M-GE had 7-rib serpentine accessory drive belts, 60 amp alternator, round-tooth camshaft belts, 9.2:1 compression ratio, knock sensor, deeper oil pan, and D-shaped intake runners.
6M-GE
Toyota increased the 5M-GE's stroke to 91 mm (3.58 in) to create the 3.0 L (2954 cc) 6M-GE. This also allowed for the fitment of larger diameter intake runners (37 versus 35 mm). Only produced in 12-valve (2 valves per cylinder) DOHC/fuel injected versions, it was available as the 6M-GE and Japan-spec 6M-GEU from 1984 through 1987. The 6M engine used the same crank, machined to accept a different torsional damperTorsional vibration
Torsional vibration is angular vibration of an object—commonly a shaft along its axis of rotation. Torsional vibration is often a concern in power transmission systems using rotating shafts or couplings where it can cause failures if not controlled....
, as the 1986-1989 7M-GE engines; this fact is witnessed by the designation "6M" stamped on the counterweight of the crank on the earlier 1986-1988 7M engines.
Output was 170-190 hp (127-142 kW) at 5600 rpm and 170-192 ft·lbf (230-260 Nm) at 4400 rpm. The 6M-GEU is usually the lower powered variant of 6M engines, due to more restrictive exhaust and increased emissions-control hardware. Even though it was never offered in US-market vehicles, it is sometimes imported from countries where it was available and transplanted into US-market Celica Supras and MX63 and MX73 Cressidas, since it is externally identical to the 5M-GE.
Applications:
- Toyota CrownToyota CrownThe Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
- Toyota SoarerToyota SoarerThe Soarer made its first appearance at the 1980 Osaka International Motor Show with the name "EX-8", and the Z10 series Toyota Soarer was produced from February 1981 to December 1985, with 2.0L, 2.8L or 3.0L DOHC I-6 variants. The first generation Soarer debuted with a rear-wheel drive...
(MZ12)
7M-GE
The Toyota 7M-GE introduced in the early months of 1986 is a 3.0 litre (2954 cc) 24-valve (4 valves per cylinder) DOHC/fuel injected engine. The valves are spaced at a performance-oriented 50° angle. Cylinder bore is 83 mm (3.27 in) and stroke is 91 mm (3.58 in).The 7M-GE was produced from 1986 through 1992. Output was 190-204 hp (142-152 kW) at 6000 rpm and 185-196 ft·lbf (250-265 Nm) at 4800 rpm.
Notwithstanding the powerful output of the engine, it was plagued with the problem of regularly blowing head gaskets due to improper torque specifications of the head bolts from the factory. The 7M-GTE turbo version suffered from the same problem. Permanent fixes typically involved a metal after-market head gasket, higher torque settings (usually 70-80 ft·lbf) and upgrading to head studs (through the ubiquitous ARP and their hardware) rather than bolts.
Specifications:
- Displacement: 2954 cc (180.2 cu in)
- Bore: 83.00 mm (3.27 in)
- Stroke: 91.00 mm (3.58 in)
- Compression Ratio: 9.1:1
- Weight: 199 kg (440 lb)
Applications:
- 1986.5–1992 Toyota Supra MkIII (MA70)
- 1989–1992 Toyota Cressida Mark IIToyota CressidaThe Toyota Cressida was a mid-size sedan marketed by Toyota from December 1976 to February 1993 through four generations. It was the flagship sedan of Toyota in the United States. The same chassis with slightly different bodies was available in other countries as the Toyota Mark II, Toyota Chaser...
(MX83) - Toyota ChaserToyota ChaserThe Toyota Chaser is a mid-size car produced by the Toyota Motor Company, Japan. Most were 4-door sedans, with the 2-door coupe discontinued after the first generation...
- Toyota CrownToyota CrownThe Toyota Crown is a line of full-size luxury sedans by Toyota. The range was primarily available in Japan and some other Asian countries, originally designed to serve as a taxi...
7M-GTE
The turbocharged 7M-GTE was produced from 1986 to 1992. Output was 232 hp at 5600 rpm and 240 ft·lb (325 N·m) at 4000 rpm for most 5 psi (0.34473786465 bar) versions. It was Toyota's top performance engine until it was replaced by the 2JZ-GTE.A special 7M-GTEU version, with a modified CT26 high-flow turbocharger and large volume intercooler, pushed output to 267 hp at 5600 rpm and 264 ft·lb (358 N·m) at 4400 rpm. This was used only in the racing homologation Toyota Supra Turbo A road and race cars. The Turbo A models also measured air based on manifold pressure rather than using an air flow meter, had a larger intercooler, larger throttle body, optimized CT-26 turbo, and various other differences. It was the fastest Japanese car at the time.
The 7M-GTE was known to suffer from blown head gaskets due to improper torque specifications of the head bolts from the factory. Despite endless claims to this problem and obvious proof of a design error, Toyota never took responsibility or issued a recall. This problem could easily be prevented by the backyard mechanic by removing the valve cover and re-torquing the head bolts to a higher torque specification. It is recommended to replace the head gasket and torque the head bolts to 75 lbs.
Specifications:
- Displacement: 2954 cc
- Bore: 83 mm (3.27 in)
- Stroke: 91 mm (3.58 in)
- Compression Ratio: 8.4:1
- Weight: 210 kg (463 lb)
Applications:
- 1986–1992 Toyota Supra MkIIIToyota SupraThe Toyota Supra is a sports car/grand tourer that was produced by Toyota Motor Company from 1979 to 2002. The styling of the Toyota Supra was derived from the Toyota Celica, but it was both longer and wider. Starting in mid-1986, the Supra became its own model and was no longer based on the Celica...
(MA70) - 1986–1991 Toyota SoarerToyota SoarerThe Soarer made its first appearance at the 1980 Osaka International Motor Show with the name "EX-8", and the Z10 series Toyota Soarer was produced from February 1981 to December 1985, with 2.0L, 2.8L or 3.0L DOHC I-6 variants. The first generation Soarer debuted with a rear-wheel drive...
(MZ20/MZ21)