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Wikipedia / Toyota K engine

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

The 8-valve OHV 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 at 6600rpm. The Publica SL received this more powerful version.

Applications:

2K

The eight-valve OHV 2K was produced from 1969 through 1988. The cylinder bore and stroke was .

Output in 1978 was at 5800rpm, and at 3800rpm. In 1983, New Zealand received a version with at 5800rpm, while Europe received a version with at 5600rpm, both with a maximum torque of at 4000rpm.

Applications:

3K

The eight-valve overhead valve 3K was produced from 1969 through 1977. Cylinder bore and stroke was .

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.

  1. Applications:

  2. Toyota Corolla (E20)

  3. Toyota Corolla (E30)

  4. Toyota Kijang/first generation Toyota Tamaraw

  5. Toyota LiteAce (KM10)

  6. Toyota Publica (later pickups and vans received the desmogged 3K-HJ engine)

  7. Toyota Starlet

  8. Toyota TownAce (KR10)

  9. Daihatsu Charmant (A10)

  10. Daihatsu Delta 750 (KB10)

  11. Specifications:

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 at 9000 rpm.

4K

The 4K was produced from 1977 through 1989. Cylinder bore and stroke was . It was an 8-valve OHV engine.

In 1980, the 4K produced at 5250rpm. From 1983 through 1984, output was at 5600rpm and at 3600rpm.

The 1981 and 1982 California-spec 4K-C produced at 5200rpm and at 3600rpm. Torque was up to at 3400rpm for the fuel injected 1982 through 1984 4K-E. The Japan-spec 4K-U produced at 5600rpm and at 3600rpm in 1982. Available in hydraulic and solid lifter configurations

Applications:

5K

The 5K was produced from 1983 through 1996. Typical output is at 5600rpm. Bore and stroke is . 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:

7K

The 7K was first introduced in 1983. Cylinder bore and stroke was . Output was at 4600rpm and at 2800rpm while the EFI version which can be found in Toyota Kijang KF80 produces at 4600rpm and at 3200rpm. 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

See also