Suzuki F engine


The Suzuki F engine is a series of inline three- and four-cylinder internal combustion petrol engines manufactured by Suzuki Motor Corporation and also licensed by many manufacturers for their automobiles. This engine was Suzuki's first four-stroke car engine when it first appeared in 1977.

Three-cylinder

F5A

The smallest F engine family with 543 cc of displacement, bore and stroke size is 62 mm × 60 mm. The F5A was basically a three-cylinder version of the F8A four-cylinder engine, without the fourth cylinder and the stroke reduced from 66 to 60 mm. Available in various versions with 6, 9, or 12 valves and SOHC or DOHC head designs, carburettor or fuel injection and naturally aspirated, turbocharged, or supercharged.
  • Max power:
  • Max torque:
Applications:
This 547 cc engine is the successor of the earlier F5A engine, with the bore and stroke size increased to 65 x 55 mm. It was available with 6 or 12-valve SOHC/DOHC head designs. Naturally aspirated and also turbocharged models, with an available intercooler, were on offer. These engines were only used between 1989 and 1990, after which the Japanese government changed the maximum displacement for kei cars up to 660 cc.
  • Max power: at 6500 to 7500 rpm
  • Max torque: at 4000 to 6000 rpm
Applications:
This 657 cc engine was introduced in 1990. Based on the old 550 cc F5B engine, it retains the 65 mm bore, but with new 66 mm stroke size.
  • Max power: at 6000 to 7000 rpm
  • Max torque: at 3500 to 4000 rpm
Applications:
A SOHC 6-valve 796 cc engine, bore and stroke size is 68.5 mm × 72 mm. This engine has never been offered in Japan and was originally intended for export models of the Suzuki Alto. This engine has since become widely available in India, Pakistan, and China, where it has been installed in a wide variety of vehicles. Originally, this engine used a carburettor, which was later removed to improve fuel efficiency and performance. The transition to Multi-Point Fuel Injection technology enabled more precise control of the air–fuel mixture, resulting in cleaner emissions and improved engine performance.
  • Max power: at 5000 to 5500 rpm
  • Max torque: at 3000 rpm
Applications:
Licensed F8B engine by Daewoo Motors for their own vehicles, as a part of technical tie-up between Suzuki and Daewoo in 1991.
  • Max power: at 5500 to 6000 rpm
  • Max torque: at 2500 to 4500 rpm
Applications:
The SOHC 12-valve version of F8B engine, developed by Maruti Suzuki in India, introduced in 2000. This engine is also the cleanest in the family, as it was able to meet Bharat Stage VI emission standard in April 2020, which is equivalent to Euro 6 emission standard.
  • Max power: at 6000 rpm
  • Max torque: at 3500 rpm
Applications:

F6B

The 658 cc F6B engine is the smallest four-cylinder engine in the family and also the only one with DOHC 16-valve valvetrain design. This engine is also the only one with turbocharger and intercooler within the four-cylinder variant. The bore and stroke size is. This engine shared the same 65 mm bore size of the three-cylinder F6A, although the stroke was shortened to 49.6 mm to keep the displacement nearly the same as the three-cylinder F6A, even with the additional fourth cylinder.
  • Max power: at 7000 rpm
  • Max torque: at 3500 rpm
Application:
A 797 cc with 62 mm x 66 mm bore and stroke size. The cylinder head design is SOHC 8-valve. This was Suzuki's first four-stroke car engine and also the oldest in the family.
  • Max power: at 5500 rpm
  • Max torque: at 3500 rpm
Applications:
This is a 970 cc, SOHC 8-valve engine version of F engine. The bore and stroke size is 65.5 mm x 72 mm. F10A is also the longest running F engine family. Debuted in 1978 Suzuki SC100, but most of the applications were ceased at least until late 1990s for international market with stricter emission regulation, such as in Europe. In 2005, this engine was upgraded with fuel injection and catalytic converter to meet Euro 2 emission standard for Indonesian market Suzuki Carry 1.0. In 2017, this engine was upgraded again to meet the Euro 4 emission standard for Vietnamese market Suzuki Super Carry. As of December 2020, F10A is still available in Vietnam and Myanmar.
  • Max power: at 5500 rpm
  • Max torque: at 3000–4000 rpm
Applications:
The 970 cc F10A engine as well as 870 cc DA/LJ462 and 1051 cc DA/LJ465Q versions are available in China and produced by numerous Suzuki's former business partners such as Jilin, Jiefang, Changan, Changhe or Hafei and used in a wide number of small vehicles, mostly based from Suzuki Carry, Suzuki Alto or even Daihatsu Hijet.

F10D

The Suzuki F10D engine is an inline four-cylinder engine that was developed in India by Maruti Suzuki for the domestic market. It was debuted in the Maruti Wagon-R in India in 1999. It was briefly installed in Maruti Alto and it was the engine that the first Maruti Zen Estilo came with. This engine is very similar to the three-cylinder F8D 12-valve engine that was optional on the Maruti 800 at the time. The bore and stroke of F10D is the same as that of the smaller sibling and shares quite a few parts like pistons, rings, connecting rods, and valves. The cast-iron engine block is very similar to that of the older F10A engine that powered the earlier Maruti Gypsy and Maruti 1000. Both F10A and F10D shares the same stroke length; but interchangeability of parts between these two engines is limited, and in some cases unknown, with current findings listed below:
Likeness:
F10A/F10D transmission bellhousing bolt patterns and diameters are the same, and it is possible to swap transmissions between A and D engines.
F10A/F10D both have the same engine mounting points threaded into the side of the engine block.
F10A/F10D have identical oil filter mounting points, the extended oil filter housing from the D can be fitted to the A, or the oil filter spigot from the A fitted to the D
Differences:
F10A intake and exhaust manifolds will not fit the F10D engine due to difference in the cylinder head bolt patterns and port spacing.
F10A oil dipstick tube is located in the centre of the block on the right-hand side, the F10Ds is front mounted on the right hand side with no port drilling in the centre of the block.
The F10D got a contemporary SOHC alloy cylinder head with 4 valves per cylinder and MPFI. The earlier engines made and the late model 32-bit ECU raised it to. It is very respectable performance for naturally aspirated 1.1 L engine. Maruti re-engineered and optimized the F10D after a few years of its introduction. This "low friction engine" as it was called has a revised engine block, lighter crank and revised oil pump.
The head is much longer than the F10A version, with a three-inch overhang over the gearbox, due to a sensor on the end of the camshaft in place of a traditional distributor, and with a cast aluminium coolant outlet bolted onto the block, consisting of a thermostat, protruding even further.
The FWD F10D sump is different shape and length, the block has differing bolt hole arrangement. The oil pick up pipe and it's mounting points are completely dissimilar on the RWD F10A, and both have different cranks and bearing caps
While the F10A and F10D could bolt to each other's FWD/RWD gearboxes and engine mounts, the F10D occupies more space and would need an updated oil feed system.
Maruti announced in September 2009 that the F10D would not meet upcoming Euro 4 emissions norms and was to be phased out in 2010. It was replaced by the new 3- and 4-cylinder K-series engines.
  • Bore/stroke ratio : 0.95
  • Unitary capacity : /cylinder
  • bmep :
  • Specific torque : /litre
  • Main bearings : 5
Applications: