GM Powertrain Car Engine Changes for 2005
Changes, additions at a glance

full info can be seen on the link at the bottom

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3500 3.5L V-6 (LX9) Car and Truck Engine
2005 Model Year Summary
Expanded applications
Large pin iron crankshaft (for Chevrolet Uplander, Saturn Relay, Pontiac Montana SV6)
Improved throttle body
PTFE crankshaft seals
Modified fuel rail assembly to implement the "shrouded tip" Multec 2 Injectors
Acoustic cover for Malibu and G6 applications

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Ecotec 2.2L L4 (L61) Car/SUV Engine
NEW OR CHANGED
2005 Model Year Summary
Standard engine in the 2005 Chevrolet Cobalt, Saturn Ion, Saturn Vue, Chevrolet Cavalier, Pontiac Sunfire, Chevrolet Malibu, Chevrolet Classic
Improved block structure
Improved main and rod bearing material and shape
Pistons receive polymer coating and feature a new piston skirt profile
Additional bosses on oil pan for NVH improvement
Acoustic cover for Chevrolet Cobalt & Saturn Ion
Modified timing chain tensioner for noise improvement.
New emissions system evaporator valve and tube

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3100 3.1L V-6 (LG8) Car Engine
2005 Model Year Summary
Long relief A500 upper and lower thrust bearing
Exhaust manifold and gaskets
Revised throttle body gasket material
Modified fuel rail assembly to implement the "shrouded tip" Multec 2 Injectors
7.5 watt, post-converter oxygen sensor

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Ecotec Supercharged 2.0L I-4 (LSJ) Car Engine
2005 Model Year Summary
Application expanded
Compact and lightweight modular design
Eaton M62 supercharger and intercooled air induction manifold
Robust head assembly
Upgraded stainless steel intake valves
Sodium-filled exhaust valves
Chain cam drive
Robust piston and rod assembly
Robust crankshaft
Improved lubrication
Fuel delivery
Ignition system
High flow exhaust
Ecotec engine management system

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3800 Series III 3.8L V-6 (L26)
2005 Model Year Summary
Super Ultra-Low Emissions rating (SULEV)
Bending braces for powertrain
Structural cast aluminum oil pan
New oil pan sealing
New front and rear crankshaft seals
New intake manifold sealing gaskets
New throttle body gasket material

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2.8L V-6 VVT (LP1)
2005 Model Year Summary
New engine for 2005 Cadillac CTS
Based on the 3.6L V-6 VVT, featuring:
Aluminum engine block and cylinder heads
Dual overhead cams with four valves per cylinder and silent chain primary drive
Four-cam phasing
Aluminum pistons with floating wrist pins and oil squirters
Polymer coated piston skirts
Forged steel crankshaft
Sinter-forged connecting rods
Structural cast-aluminum oil pan with steel baffles
Dual-stage variable aluminum intake manifold
Advanced sequential port fuel injection
Electronic throttle control with integrated cruise control
Coil-on-plug ignition
Engine-mounted micro-hybrid engine control module (ECM)
Optimized exhaust manifolds with close-coupled catalytic converters
Fully isolated composite camshaft covers
Outstanding noise, vibration and harshness control, including damped front engine cover
Maximum durability, minimum maintenance
Best/common manufacturing practices for efficiency and exceptional quality

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3.6L V-6 VVT (LY7)
2005 Model Year Summary
Two new applications
Silent chain primary drive
Damped front engine cover
Polymer coated piston skirts

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6.0L 90-degree V-8 (LS2) Car Engine
2005 Model Year Summary
New for Chevy Corvette and Pontiac GTO
Displacement increased from 5.7 liters to 6.0 liters
Output increased from 350 hp to 400 hp
Larger intake
Stronger, floating wrist pins on flat-top pistons
Less-restrictive exhaust, improved heat shields
More efficient combustion chamber design
Higher compression ratio
New E40 ECM with integral electronic throttle
Higher lift camshaft
Lighter water pump
Lighter, smaller oil pan
Lower tension piston rings
Crankcase vent redesigned

http://media.gm.com/division/2005_pr...ain/index.html

 

all those changes on the 2.0 s/c will make it more dependable? or make more power?

 

it makes them dependable at the power level its at... they put turbos on that engine in saabs and opels, and they need the engine to hold up under the stress of boost

 

I would like to see that 2.8 in a smaller, performance application. Perhaps boosted as well. If only Caddy had a kappa roadster like the Solstice...

 

I though the new Saab Turbo's where going to have the Boxter engines (92x). I know they had the 2.0 turbo ecotec in the past. I don't understand why GM made the move to the Subaru clone in their Saabs... :?:

ZiN

 

the saab 9-2x is a subaru WRX, 2.0L turbo boxer engine... the 9-3 is based on the malibu platform, with a turbo 2.0 ecotec engine