Toyota K engine

Toyota K engine
4K engine in a Corolla DX
Overview
ManufacturerToyota
Production1966–2007
Layout
ConfigurationNaturally aspirated straight-four
Cylinder block materialCast iron
Cylinder head materialAluminium alloy
ValvetrainOHV 2 valves per cylinder
Valvetrain drive systemTiming chain
Combustion
Fuel systemCarburettor
Multi-port fuel injection
Fuel typePetrol
Oil systemWet sump
Cooling systemWater-cooled
Output
Power output45–83 PS (33–61 kW; 44–82 hp)
Torque output66–147 N⋅m (7–15 kg⋅m; 49–108 lb⋅ft)
Chronology
SuccessorToyota 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.)