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Cadillac has produced two 3.6 liter V-6 engines since being purchased by GM in 1909. The first engine produced was the 3.6 VVT (Variable Valve Timing) and the second engine produced was the 3.6 VVT DI (Variable Valve Timing, Direct Injection).
3.6 Liter VVT
The first production of the 3.6 liter includes Variable Valve Timing to speed up or slow down the valve timing as needed. This engine produces 255 horsepower at 6,500 rpm and 254 ft.-lbs. of torque at 2,800 rpm.
3.6 Liter VVT DI
The second production of the 3.6 liter is the same engine as the original. It simply adds direct fuel injection. Direct injection feed fuels straight into the cylinder as opposed to into the intake. This engine produces 302 to 304 horsepower at 6,300 rpm and 273 ft.-lbs of torque at 5,200 rpm.
Applications
The VVT version was installed in the 2003 to 2007 CTS, 2007 to 2009 STS and the 2007 to 2010 SRX. The VVT DI engine was included in the 2008 to present CTS (304 horsepower) and the 2010 to 2011 STS (302 horsepower).
