The Suzuki K6A engine is a compact 0.66-liter three-cylinder engine with a number of modifications produced from 1994 to 2018 at the Sagara Plant. This engine was used in various Suzuki car models including Suzuki Alto, Jimny, Wagon R and others. Below are the detailed specifications of the atmospheric and turbocharged versions of the K6A engine, along with a list of the models in which it was used.
General Specifications of Suzuki K6A
| Parameter | Value |
|---|---|
| Engine make | K6A |
| Years of production | 1994-2018 |
| Cylinder Block Material | Aluminum |
| Engine type | Row, 3-cylinder |
| Power system | Injector |
| Number of valves per cylinder | 4 |
| Cylinder diameter, mm | 68 |
| Piston stroke, mm | 60.4 |
| Compression ratio | 8.4 – 12.5 |
| Engine displacement, cc | 658 |
| Fuel | Petrol (AI-92, AI-95, optionally AI-98) |
| Environmental standards | – |
| Motor weight, kg | 55 |
| Oil consumption, g/1000 km | up to 1000 |
| Engine oil | 5W-30, 10W-30 |
| Oil volume, l | 2.8 |
| Oil change, km | 2500-5000 (turbo), 5000-10000 (atmo) |
| Operating temperature | 90 °C |
| Engine life, thousand km | 150+ |
Atmospheric version K6A: Technical characteristics
| Parameter | Value |
|---|---|
| Maximum power, hp | 44-58 |
| Maximum torque, N-m (kg-m) | 57 (6) / 3500, 62 (6) / 3000 |
| Compression ratio | 10.5-11 |
| Cylinder volume change mechanism | No |
| Valve drive | DOHC, SOHC |
| Start-stop system | Optional |
| Fuel consumption, l/100 km | 2.9-6.7 |
Turbocharged version K6A: Technical characteristics
| Parameter | Value |
|---|---|
| Maximum power, hp | 60-64 |
| Maximum torque, N-m (kg-m) | 83 (8) / 3000, 108 (11) / 3500 |
| Compression ratio | 8.9-9 |
| Cylinder volume change mechanism | No |
| Valve drive | DOHC, SOHC |
| Start-stop system | No |
| Fuel consumption, l/100 km | 4.9-7.4 |
Cars with Suzuki K6A engine
| Vehicle Model | Generation (code) | Years of manufacture |
|---|---|---|
| Suzuki Alto | 4 (HA11) | 1994-1998 |
| 5 (HA12) | 1998-2004 | |
| 6 (HA24) | 2004-2009 | |
| 7 (HA25) | 2009-2014 | |
| Suzuki Cappuccino | 1 (EA11) | 1995-1998 |
| Suzuki Cervo | 5 (HG11) | 2006-2009 |
| Suzuki Every | 4 (DA52) | 2001-2005 |
| 5 (DA64) | 2005-2015 | |
| Suzuki Jimny | 2 (SJ) | 1995-1998 |
| 3 (FJ) | 1998-2018 | |
| Suzuki Lapin | 1 (HE21) | 2002-2008 |
| 2 (HE22) | 2008-2015 | |
| Suzuki MR Wagon | 1 (MF21) | 2001-2006 |
| 2 (MF22) | 2006-2011 | |
| Suzuki Kei | 1 (HN11) | 1998-2009 |
| Suzuki Palette | 1 (MK21) | 2008-2013 |
| Suzuki Wagon R | 1 (CT21) | 1995-1998 |
| 2 (MC21) | 1998-2003 | |
| 3 (MH21) | 2003-2008 | |
| 4 (MH23) | 2008-2012 | |
| Mazda AZ-Wagon | II (MD11) | 1998-2003 |
| III (MJ21) | 2003-2008 | |
| IV (MJ23) | 2008-2012 | |
| Mazda Carol | IV (HB12) | 1998-2003 |
| V (HB24) | 2004-2009 | |
| VI (HB25) | 2009-2014 | |
| Mazda Laputa | I (HP11) | 1999-2006 |
| Mazda Spiano | I (HF) | 2002-2008 |
| Nissan Moco | 1 (G21) | 2002-2006 |
| 2 (G22) | 2006-2011 | |
| Nissan Pino | 1 (HC24) | 2007-2010 |
| Nissan Roox | 1 (ML21) | 2009-2013 |
Suzuki K6A Engine Service Manual
| Maintenance item | Periodicity | Notes |
|---|---|---|
| Oil service | every 10,000 km | Required oil quantity: 2.9 liters |
| Oil type | 5W-30, 5W-40 | |
| Gas distribution mechanism | chain | |
| Transmission chain life | 90,000 km | In practice – up to 100 000 km |
| Adjustment of thermal valve clearances | every 30,000 km | Inlet: 0.18-0.23 mm |
| Inlet: 0.18-0.23 mm (turbo: 0.30-0.35 mm) | ||
| Oil filter | every 10,000 km | |
| Air filter | every 10,000 km | |
| Fuel filter | every 30,000 km | |
| Spark plugs | every 30,000 km | |
| Auxiliary belt | every 60,000 km | |
| Coolant | every 3 years or 60,000 km |
Following this maintenance schedule extends the life of the K6A engine and reduces the risk of malfunctions.
K6A Engine Reliability and Repair
Suzuki K6As the smallest engine Suzuki series K first appeared in 1994 on the Suzuki Alto, and in 1995 it began to be put in the well-known Suzuki Jimny, for the domestic Japanese market. It replaced the similarly modestly sized F6A. It uses a 3-cylinder aluminum cylinder block with semi-wet liners, inside which a short cast-iron crankshaft with a piston stroke of 60.4 mm was put. Cylinder diameter is 68 mm, piston height is 25.5 mm, and there are also used H-shaped connecting rods with a length of 113.9 mm. As a result, we get a small motor with a working volume of 658 cubic meters or 0.66 liters or 0.7 liters if so more warms the soul.
The cylinder head is twin-shaft 12-valve. Diameter of inlet valves 24.5 mm, exhaust valves 21.5 mm, rod diameter 5.5 mm.
The motor comes without hydrocompensators, so every 30 thousand kilometers it is desirable to check whether it is time to adjust the valves. The valves are adjusted with washers. Valve clearances on cold for turbo version: intake – 0.18-0.23 mm, exhaust – 0.3-0.35 mm; for atmospheric: intake and exhaust – 0.18-0.23 mm.
On some modifications VVT was installed on the intake.
The camshafts rotate from the timing chain. Its service life is not pleasing – about 90-100 thousand kilometers.
Turbo versions were equipped with turbines IHI RHF3 or Hitachi HT06. Turbine resource is about 100 thousand kilometers.
The motor has many different versions:
- atmospheric (with or without VVT, hybrid version, modification to run on lean mixture)
- turbo (with or without VVT)
- version for operation on gas
In our conditions, the motor is found only on the Jimny, so the turbo version with 64 hp is common, the others are not relevant.
In addition to this very tiny engine, the Suzuki K family includes quite a few other motors:
- 3-cylinder: K10B and K10C
- 4-cylinder: K10A, K12A, K12B, K12C, K12D, K12M, K12N, K14B, K14C, K14D and the top K15B
Production of the K6A was discontinued in 2018 as the new 3-cylinder 0.66-liter R06A was introduced.
Problems and reliability of K6A engines
Low turbine life
Many engine modifications are equipped with a turbine from IHI or slightly less often Hitachi, and with a spitting attitude to the power unit, they rarely go more than 50,000 km. It is necessary to change oil regularly and let the engine idle after a trip.
Gbc gasket failure
The second most popular problem of this engine is the breakdown of the cylinder-head gasket. Keep a close eye on the cooling system, pump and motorized fan.
Stretching the timing chain
According to the regulations, the timing chain is changed every 90 000 km of mileage, but active drivers and especially in the version with a turbine it is pulled out earlier. And in case of overshoot it bends valves.
Oil consumption
At mileage of more than 150 000 km, the oil rings are usually already sealed and there is a small oil consumption. Raskoksarovka here most often will not help and it is necessary to replace the rings.
Other disadvantages
Very often detonation occurs when using gasoline with low octane number in hot weather, there are leaks of grease on the oil seals, the bearing of the tensioner of the timing belt jams. Do not forget to adjust the clearances, because valve burnout here is not an uncommon phenomenon.
In general, the motor is more or less bearable, but too weak. Suzuki Jimny is a small, but frame off-roader weighing 1 ton and 660 cubic meters motor has to strain a lot to drag it, respectively, there is no economy. The motor resource is also not impressive – about 150-200 thousand kilometers, then oil consumption and overhaul.
The number is stamped on the cylinder block just below the exhaust manifold (behind the turbine), near the gearbox.
K6A engine tuning
Atmo
Atmospheric tuning of such a small engine is a super doubtful idea, but it still exists. On sale there is a stroker kit from JUN for this engine, which assumes peregilzovka under forged piston 72 mm, installation of a crankshaft with a stroke of 68 mm, new connecting rods and as a result 0.83 liters of working volume!!!! However, such a set can be compared to the cost of a well-built Suzuki Jimny.
Turbotuning is a bit more rational, but not the best option either. Here you can put a turbine Hitachi HT07 from liter K10A or something similar, but it will be blown later and you will not see traction at low speeds (what you need Jimny for).
The most sensible and proper tuning of the K6A is a swap of some M13A or M16A or maybe even an M18A.
MOTOR RATING: 3