2012 Cadillac SRX

2012 Cadillac SRX SUV is the presentation of a new 3.6-liter V6 known by its “LFX” code, and which will be the sole engine offering in the range. Result, the Cadillac SRX produces 16-percent more horsepower at 308HP (SAE-rated) and 18-percent more torque at 265 lb-ft (359Nm) than the outgoing V6, which is rated at 265HP and 223 lb.-ft (302 Nm).

Cadillac SRX also added the Base and Sport suspension systems for the 2012MY to improve the ride quality.


The function of LFX is as E85 ethanol-capable and is paired up to an electronically controlled six-speed automatic transmission. Customers can choose between front-wheel drive only and all-wheel drive systems, with the latter incorporating an electronic limited-slip (eLSD) rear differential.


The LFX engine is a technically advanced 60-degree V-6 with dual-overhead camshafts, continuously variable valve timing and direct injection. Supporting elements that contribute to its performance, refinement and durability include:

The cylinder block and cylinder heads are cast in aluminum for low weight.
A composite intake manifold saves approximately 5.5 pounds (2.5 kg) over the weight of a comparable aluminum intake. It also has a comparatively small radiated surface area to help it maintain excellent noise and vibration characteristics.

• An integrated cylinder head/exhaust manifold design saves approximately 13 pounds (6 kg) per engine when compared with a comparable engine with separate head/manifold assemblies.
• The cylinder heads include four valves per cylinder, with a dual overhead camshaft design incorporating infinitely variable cam phasing.
• A forged steel crankshaft provides optimal strength in the bottom end, while the connecting rods are made of powdered metal that features a higher ratio of copper, which makes them stronger and enables them to be lighter.
• The pistons are made of lightweight cast aluminum and feature a friction-reducing polymer coating on the skirts , as well as fully floating wrist pins, which also help reduce friction. Less weight in the pistons means less reciprocating mass in the engine, which in turn means less inertia and greater operating efficiency.
• Pressure-actuated oil squirters drench the underside of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil.
• A cast aluminum oil pan is stiffer to improve powertrain rigidity and reduce vehicle vibration. It bolts to the transmission bell housing as well as the engine block, eliminating points of vibration. Cast aluminum dampens internal engine noise better than a conventional stamped steel pan and is structurally stiffer.
• Optimized-flow fuel injectors and the integrated exhaust manifolds/cylinder heads promote lower emissions.