Nissan CA engine

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The CA engine is a series of 1.6 to 2.0 L (1,598 to 1,974 cc) Inline-4 piston engines from Nissan. It is designed for a wide variety of smaller Nissan vehicles to replace the Z engine and some smaller, four-cylinder L series engines. The "CA" stands for Clean Air, due to the installation of Nissan emission reducing technology, called NAPS-X. The CA is a cast iron block, aluminum head design with a timing belt, which was cheaper to make than the timing chain setup on the Z and L engines. Earlier versions featured SOHC and eight valves. The new CA block design was a scaled-up E series block with timing shaft and other ancillaries removed. The oil pump is fitted directly onto the crank nose and the distributor is driven by the end of the camshaft. Like the E series and the A block from which the E was derived, Nissan used a taller block for the largest stroked 2.0-litre engine. The CA was designed to be compact and light, with a CA16 requiring only 195 litres (52 US gal; 43 imp gal) of space (compared to 280 litres (74 US gal; 62 imp gal) for the earlier Z16), while weighing 23% less at 115 kg (254 lb). Later versions featured DOHC with 16 valves for increased efficiency at high engine speeds and a smoother power delivery. The hydraulic lifters are interchangeable between all DOHC RB and VG series engines excepting those with solid lifters. The Nissan CA would also be developed into a diesel engine, known as the CD, which replaced the four-cylinder LD series. The engine was deemed too expensive to produce due to its cast-iron block, and over the years it also no longer met the ever-changing Japanese emission standards that were emerging at the time. The...