GM referred to many of its diesel engines as Ecotec including the
GM Medium Diesel engine
The Medium Diesel Engine (MDE) is a four-cylinder diesel engine developed by Adam Opel AG and branded "1.6 CDTI Ecotec" in most markets. Opel also adds the marketing term "Whisper Diesel" in some markets, claiming relatively low levels of noise, ...
(2013 onwards) and the
Isuzu-derived
Circle L engine
The Circle L is an automobile engine produced by GM Powertrain Poland in Poland. It is a inline-four 16-valve turbocharged diesel engine originally designed by Isuzu but now owned by General Motors. The engine is produced in Europe by General ...
. This page describes the
SOHC
An overhead camshaft (OHC) engine is a piston engine where 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 combustion cha ...
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 systems ...
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 Circle L is an automobile engine produced by GM Powertrain Poland in Poland. It is a inline-four 16-valve turbocharged diesel engine originally designed by Isuzu but now owned by General Motors. The engine is produced in Europe by General ...
. 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
Variable-geometry turbochargers (VGTs), occasionally known as variable-nozzle turbines (VNTs), are a type of turbochargers, usually designed to allow the effective aspect ratio of the turbocharger to be altered as conditions change. This is done ...
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 1995cc), and 22 for 2.2 litres (actually 2171cc). 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 2005)
*
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)
See Also
*
Motore Opel Ecotec Serie 20DT (Italian Wikipedia)
*
Motore Opel Ecotec Serie 22DT (Italian Wikipedia)
References
{{reflist
General Motors engines
Diesel engines