TOYOTA F ENGINE REPAIR MANUALS.
F
F Manufacturer Toyota
Production 1955-1974
Predecessor B
Successor F (1974)aka F.5
Displacement 3.9 L (3878 cc)
Cylinder bore 90 mm
Piston stroke 102 mm
Compression ratio 6.8/1
Fuel system Carbureted
Fuel type Gasoline
Power output 75/93 kW (105/125 hp)
Torque output 261/289 N·m (189/209 ft·lb)

The F engine is a 3.9 liter, 75/93 kW (105/125 hp), carburated gasoline engine that is capable of 261/289 N·m (189/209 ft·lbf) of torque at 2000 RPM; the difference in power and torque is different depending on the export destination. The original design was started in the early 1950s when Toyota had begun to export their vehicles internationally.

The F engine block, crankshaft and lower end assembly is loosely based on the 1939-63 G.M.C. L6 OHV 228 OHV engine but with a taller deck (rather than the similar but smaller Chevrolet 1937-63 Gen-2 L6 OHV engine), and built under license. The cylinder head and combustion chamber is derived from the Chevrolet L6 OHV stovebolt engine, slightly scaled up. The general idea was consumers would feel comfortable with the engine since it was a familiar design and had a proven track record. None of the bottom end of the engine is interchangeable with these engines.

The F engine replaced the early 3.4 liter B gasoline engine introduced in 1937 (not to be confused with the 2.9 liter B diesel engine introduced much later). The early B engine was based on the original 1929-36 Chevrolet Gen-1 207 inline-6, not the later 1937-63 Gen-2 216, 235 etc. engine.

[edit] F (9/73-12/1974)
F (9/1973-1974) Manufacturer Toyota
Also called F.5 or F and a half
Production 9/73-12/1974
Predecessor Toyota Type F engine
Successor 2F
Displacement 3.9 L (3878 cc)
Cylinder bore 90 mm
Piston stroke 102 mm
Compression ratio 6.8/1
Fuel system Carbureted
Fuel type Gasoline
Oil system Same as 2F
Cooling system Water
Power output 75/93 kW (105/125 hp)
Torque output 261/289 N·m (189/209 ft·lb)

The F (9/73-12/1974) engine is a 3.9 liter, 75/93 kW (105/125 hp), carburated gasoline engine that is capable of 261/289 N·m (189/209 ft·lbf) of torque at 2000 RPM; the major difference between the F and the F.5 is the oiling system. The F.5 (09/1973-12/1974) uses the same oiling set-up and configuration as its successor the 2F.