GM referred to many of its diesel engines as Ecotec including the GM Medium Diesel engine (2013 onwards) and the

Isuzu , commonly known as Isuzu (, ), is a Japanese multinational automobile manufacturer headquartered in Yokohama, Kanagawa Prefecture. Its principal activity is the production, marketing and sale of Isuzu commercial vehicles and diesel engines ...

-derived Circle L engine. This page describes the

SOHC An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combus ...

16 valve turbocharged engines which GM introduced in 1997. and which were used extensively in its European models. The engines used a single chain-driven

camshaft A camshaft is a shaft that contains a row of pointed cams in order to convert rotational motion to reciprocating motion. Camshafts are used in piston engines (to operate the intake and exhaust valves), mechanically controlled ignition syst ...

and an aluminium cylinder head with a Bosch rotary high pressure injection pump.

Variants

The 2.0 engine was available in two different power outputs, badged by Vauxhall Di and DTi, the lower powered version retaining 16 valves and a turbocharger, but lacking the intercooler. The lower powered version was soon replaced by the smaller and unrelated 1.7 litre Circle L engine. The higher powered version produced and of torque. The 2.2 engine was introduced as a unit, but in late 2000 was updated to with of torque from just 1,500 rpm, rather than the previous from 1,900 rpm. The update also included changes to the camshaft and pistons, and the newer unit was smoother. This update also introduced pilot injection and a variable geometry turbocharger These engines were replaced by the 1.9 litre GM/Fiat JTD.

Engine Codes

GM referred to these engines using a six-character code, such as Y20DTH. The first letter is X for Euro 2 engines, and Y for those meeting the Euro 3 emissions standard. The two digits are 20 for 2 litres (actually 1,995 cc), and 22 for 2.2 litres (actually 2,171 cc). The next two letters are always DT. The final letter is L if it lacks an intercooler, H if it has an intercooler, and R if it has both an intercooler and a variable geometry turbocharger. Saab referred to the engine as a D223L, regardless of whether it was a Y22DTH or a Y22DTR.

Applications

* Vauxhall/Opel Astra, fourth generation (2.0 only) * Vauxhall/Opel Frontera, second generation (2.2 only) * Vauxhall/Opel Omega B2 * Vauxhall/Opel Signum (until 2004) * Vauxhall/Opel Sintra (2.2 only, 1999 only) * Vauxhall/Opel Vectra, series B, and series C until 2004 * Vauxhall/Opel Zafira, series A (2.0 in UK, 2.2 also offered in some markets) * Saab 9-3, first generation (2.2 only) * Saab 9-3, second generation (2.2 only, until end 2004) * Saab 9-5, first generation (2.2 only, 2002 to 2005)

References

{{reflist General Motors engines Diesel engines

Variants

Engine Codes

Applications

See also

References