Toyota K engine
title: "Toyota K engine" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["toyota-engines", "straight-four-engines", "gasoline-engines-by-model"] topic_path: "general/toyota-engines" source: "https://en.wikipedia.org/wiki/Toyota_K_engine" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="Infobox automobile engine"]
| Field | Value |
|---|---|
| name | Toyota K engine |
| image | Toyota 4K Engine in Toyota Corolla DX (KE70).jpg |
| caption | 4K engine in a Corolla DX |
| manufacturer | Toyota |
| production | 1966–2007 |
| configuration | Naturally aspirated straight-four |
| valvetrain | OHV 2 valves per cylinder |
| timing | Timing chain |
| block | Cast iron |
| head | Aluminium alloy |
| fuelsystem | Carburettor |
| Multi-port fuel injection | |
| fueltype | Petrol |
| oilsystem | Wet sump |
| coolingsystem | Water-cooled |
| power | 45-83 PS |
| torque | 66-147 Nm |
| successor | Toyota E engine (up to 1.3 L models) |
| :: |
::callout[type=note] the Toyota engine ::
| name = Toyota K engine | image = Toyota 4K Engine in Toyota Corolla DX (KE70).jpg | caption = 4K engine in a Corolla DX | manufacturer = Toyota | production = 1966–2007 | configuration = Naturally aspirated straight-four | valvetrain = OHV 2 valves per cylinder | timing = Timing chain | block = Cast iron | head = Aluminium alloy | fuelsystem = Carburettor Multi-port fuel injection | fueltype = Petrol | oilsystem = Wet sump | coolingsystem = Water-cooled | power = 45-83 PS | torque = 66-147 Nm | successor = Toyota E engine (up to 1.3 L models)
The Toyota K series is an inline-four engine that was produced from 1966 through 2007. It is a two-valve pushrod engine design. It was originally built from the Toyota Kamigo plant in Toyota City factory in Japan.
All K series are non-crossflow engines – the inlet and exhaust manifolds are on the same side. They have cast iron blocks and aluminium alloy heads, with a crankshaft supported by five main bearings. K series motors have both hydraulic tappet or hydraulic valve lifters, solid lifters and 1.5 ratio rockers with an adjustment thread for tappet clearance. 7K engines were released with only the hydraulic valve lifters from factory, whereas 4K and 5K engines were made with both hydraulic and solid lifters (depending on year and which model vehicle.)
K-B
K
::figure[src="https://upload.wikimedia.org/wikipedia/commons/7/72/1966_Toyota_K_Type_engine_front.jpg" caption="1966 Toyota K engine"] ::
The 8-valve OHV 1077 cc K was produced from 1966 through 1969. A similar K-B was produced from 1968 through 1969, the -B designates twin carburettors. Thus equipped, the engine produces 73 PS at 6600 rpm. The Publica SL received this more powerful version.
Applications:
- Toyota Corolla (KE1x)
- Toyota Publica (KP3x)
2K
The eight-valve OHV 993 cc 2K was produced from 1969 through 1988. The cylinder bore and stroke was 72x61 mm.
Output in 1978 was 47 hp at 5800 rpm, and 6.7 kgm at 3800 rpm. In 1983, New Zealand received a version with 40 kW at 5800 rpm, while Europe received a version with 33 kW at 5600 rpm, both with a maximum torque of 6.7 kgm at 4000 rpm.
Applications:
- Toyota Publica/1000 (KP30/KP36)
- Toyota Starlet
3K
3K
::figure[src="https://upload.wikimedia.org/wikipedia/commons/5/5b/Toyota_3K_engine.jpg" caption="Toyota 3K engine."] ::
The eight-valve overhead valve 1166 cc 3K was produced from 1969 through 1977. Cylinder bore and stroke was 75x66 mm.
The 1969 through 1975 3K-B was a twin-carburetor version. The California-spec 3K-C (1977–1979) and 3K-H were other available versions.
;Applications:
- Toyota Corolla (E20)
- Toyota Corolla (E30)
- Toyota Kijang/first generation Toyota Tamaraw
- Toyota LiteAce (KM10)
- Toyota Publica (later pickups and vans received the desmogged 3K-HJ engine)
- Toyota Starlet
- Toyota TownAce (KR10)
- Daihatsu Charmant (A10)
- Daihatsu Delta 750 (KB10)
;Specifications: ::data[format=table title="style="text-align: left; font-weight: normal" | (outputs are [[Horsepower#JIS|JIS]] unless otherwise noted)"]
| Code | PS | kW | HP | at rpm | kgm | Nm | lb-ft | at rpm | Compr. Ratio | Comments |
|---|---|---|---|---|---|---|---|---|---|---|
| 3K | 68 PS | 6000 | 9.5 kgm | 3800 | 9.0:1 | |||||
| 58 PS | 6300 | 8.1 kgm | 3900 | (DIN) | ||||||
| 73 hp | 6000 | 10.3 kgm | 3800 | Export (SAE gross) | ||||||
| 3K-B | 77 PS | 6600 | 9.6 kgm | 4600 | 10.0:1 | Twin carburettors, high octane | ||||
| 64 PS | 6200 | 9.0 kgm | 4000 | (DIN) | ||||||
| 83 hp | 6600 | 10.4 kgm | 4600 | Export (SAE gross) | ||||||
| 3K-BR | 74 PS | 6600 | 9.5 kgm | 4600 | 9.0:1 | As 3K-B but for regular octane | ||||
| 3K-C | 59 PS | 5800 | 8.7 kgm | 3800 | California emissions controls (SAE net) | |||||
| 3K-D | 73 PS | 6600 | 9.6 kgm | 4200 | 10.0:1 | High compression, single carburettor | ||||
| 3K-H | 71 PS | 6000 | 9.7 kgm | 4200 | 9.0:1 | High octane | ||||
| 55 PS | 6000 | 8.5 kgm | 3800 | (DIN) | ||||||
| script-title=ja:トヨタオート | trans-title=Toyota Auto | language = ja | publisher = Toyota | type = catalog | page = 13 | date=June 1977 | id = 041183-5206 }} | 64 PS | 5800 | 9.2 kgm |
| 3K-HJ | 67 PS | 5800 | 9.4 kgm | 3600 | Japanese emission controls for commercial vehicles (Publica Van/Pickup, Starlet Van) | |||||
| 3K-U | 64 PS | 5800 | 9.2 kgm | 3600 | Japanese emission controls (TTC-C) ("Toyota Total Clean-Catalyst") | |||||
| 3K-R | 183 PS | 9000 | 19.6 kgm | 8200 | 13.0:1 | TRD Racing circuit engine | ||||
| :: |
3K-R
The 3K-R engine, also known as the 137E, was a special version of the standard 3K fitted to the Toyota Starlet (KP40) for use in touring car racing in Japan. The engine was developed by TOM’S in 1974 and was one of their first major developments as a tuner for Toyota. The 3K-R has a 16 valve dual overhead camshaft cylinder head with a compression of 13:1 and was fuelled by a Nippon Denso built mechanical fuel injection system. The engine was also bored out to 1.3 L (1293 cc) and had a dry sump oil system. The engine produced 180 hp at 9000 rpm.
4K
4K
::figure[src="https://upload.wikimedia.org/wikipedia/commons/3/31/4K-U.jpg" caption="4K-U engine"] ::
The 1290 cc 4K was produced from 1977 through 1989. Cylinder bore and stroke was 75x73 mm. It was an 8-valve OHV engine.
In 1980, the 4K produced 58 hp at 5250 rpm. From 1983 through 1984, output was 62 hp at 5600 rpm and 9.9 kgm at 3600 rpm.
The 1981 and 1982 California-spec 4K-C produced 58 hp at 5200 rpm and 9.2 kgm at 3600 rpm. Torque was up to 10.2 kgm at 3400 rpm for the fuel injected 1982 through 1984 4K-E. The Japan-spec 4K-U produced 74 hp at 5600 rpm and 10.7 kgm at 3600 rpm in 1982. Available in hydraulic and solid lifter configurations
Applications:
- Toyota Corolla (E70)
- Toyota Kijang
- Toyota Liteace
- Toyota Starlet
- Daihatsu Charmant
- 1977–1979 Daihatsu Delta 750 (KD11)
5K
5K
::figure[src="https://upload.wikimedia.org/wikipedia/commons/2/2b/5K-C.JPG" caption="Toyota 5K-C engine in a 1991 Liteace"] ::
::figure[src="https://upload.wikimedia.org/wikipedia/commons/c/c3/5K_engine.jpg" caption="5K engine in a 1993 [[Toyota Kijang"] ::
The 1486 cc 5K was produced from 1983 through 1996. Typical output is {{convert| 74|hp|kW hp PS|abbr=on|0|order=out}} at 5600 rpm. Bore and stroke is 80.5x73 mm. It was available with either 4- or 5-speed manual transmissions. Like the smaller 4K model, it uses hydraulic lifters as well as solid lifters for the pushrod.
Applications:
- 1983.08-1987.10 Toyota Carina Van (KA67V 'Van') 5K-J
- 1983.05-1987.08 Toyota Corolla Van (KE74V) 5K-J
- 1983.10-1987.12 Toyota Corona Van (KT147V 'Van') 5K-J, 83 PS at 5,200 rpm
- Toyota Liteace KR27 Van
- Toyota Liteace KM36 Van 49 kW at 4800 rpm, 11.7 kgm at 3200 rpm
- Toyota Kijang/Tamaraw
- Toyota TownAce KR41 Van
- Toyota Forklift (late 1980s-early 1990s model)
{{anchor|7K-E}} 7K
::figure[src="https://upload.wikimedia.org/wikipedia/commons/1/1b/1996_Toyota_7K_Engine.jpg" caption="7K-C engine in a 1996 Toyota Kijang"] ::
The 1781 cc 7K was first introduced in 1983. Cylinder bore and stroke was 80.5x87.5 mm. Output was 80 hp at 4600 rpm and 14.2 kgm at 2800 rpm while the EFI version which can be found in Toyota Kijang KF80 produces 83 hp at 4600 rpm and 15 kgm at 3200 rpm. The Engine was available with a 5 speed manual & 4 speed automatic transmission. Available in both fuel injected and carburetted configurations, the 7K produces much more power and torque compared to the other K engines however it is a lot less 'rev happy' due to having such a long stroke.
7K-E is available in KR42 Townace SBV vans (1997–2007) using a large G52 5 speed gearbox (same bellhousing to box pattern as W55), or automatic.
Applications:
References
References
- link. トヨタ自動車75年史 [75 years of Toyota history]. Toyota Motor Co.
- Tekniikan Maailma Magazine. (1978)
- (February 1973). "Toyota Corolla 1200". Toyota Deutschland.
- (1972). "Toyota Corolla: One of the Toyota Collection". Toyota (G.B.) Limited.
- {{citation. [[Toyota]]. (June 1977)
- Tolosa, Jofel. (2017-09-14). "1974 Toyota Starlet - Sky Full Of Stars". MotorTrend.
- "Tom's 3K-R Engine 180bhp @ 9000 RPM 1.3l".
- "5th Corolla Van". Toyota.
- [http://members.iinet.com.au/~stepho/manuals/Corona/jdm%20list.gif List of RT140 Coronas sold in Japan]. Toyota Motor Co., No. 261150
- (August 1985). "New Corona Van ''(Catalog)''". Toyota Motor Corporation.
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