Originally Posted by DweezilAZ
Originally Posted by clinebarger
It is a Quad 4, GM just changed the displacement slightly & dropped the Quad 4 name. The Ecotech is closely related/Evolution of the Quad 4 but they made the WP easier to change with the use of a special tool.
No it's not.
GM Powertrain NA, Opel and Saab developed the engine. This isn't a Quad [ lead development by Oldsmobile ]. This engine was to be the launch point for a world engine family.
Other than the DOHC, chain driven cam and 4 cylinders they're not closely related.
It's the LD9 engine and The LD9 Twin Cam was a 2.4 L (146 cu in) Quad 4 variant with balance shafts, and a redesigned cylinder head which debuted in 1996.