Is this a SIDI or a alloytec

Second one is a SIDI, I can't tell with the first one from pics! Maybe someone else can help.

 

i dont think either of them are. the intake pipes are different and they say they are only 5 speed autos, SIDI have 6sp

 

I was under the impression that all 5 speed autos were SIDI. But i could be wrong.

 

I thought the 6sp's came out when the sidi's came out

 

MY9.5 are Alloytecs
MY10 are SIDI

Both of the ones linked are alloytecs

Look toward the bottom of he page for "Model year changes":
Holden VE Commodore - Wikipedia, the free encyclopedia

"
MY09.5:
upgrades affected models ordered from 21 October 2008[56] and produced from November.[57] Instrument cluster illumination was commonised to white. The turn-by-turn navigation and Berlina V8 options were removed. Engine wise, the "premium" version of the Alloytec V6 was now fitted to the Omega and Berlina, bringing improved fuel consumption and a slight reduction in engine output (see above).[56] A range of safety upgrades were also introduced (see above).[40] Further MY09.5 changes were introduced in March 2009. The space-saver spare wheel were discontinued and replaced by two no-cost options: either a lightweight tyre inflator kit or a full-size spare wheel (previously an extra cost).[95] Sportwagon variants of the Calais V and SS V receive an alloy spare wheel if the full-size spare is chosen, while the remainder of the line-up receives a steel wheel spare.[96] March also signaled an opportunity for Holden to replace the dark-grey horizontal dashboard strip and steering wheel spokes as used on the SV6, SS and SS V to a matte silver type.[97] The safety improvements made to the Omega sedan from October production onwards were also introduced for the Omega Sportwagon (see above),[41] and the "V-Series" insignia used on SS V and Calais V models was removed, replaced by a single "SS V" or "Calais V" badge.
MY10:
versions of the VE were released in September 2009. New 3.0-litre and 3.6-litre V6s have been introduced, featuring Spark Ignition Direct Injection (SIDI) and coupled to a new six-speed automatic transmission (see above).[98] These revised powertrains are marketed as part of Holden's EcoLine range.[65] Visually, all SIDI versions are distinguished by relocated and additional EcoLine badging.[93] 3.0-litre versions now utilise twin exhaust outlets.[93] Updated cars also gain a recalibrated suspension setup and an extra ball-joint in the rear suspension (previously introduced on the Sportwagon); the result is increased tautness and improved handling in models fitted with 18 and 19-inch diameter wheels.[99] These cars are also equipped with a larger 24-millimetre (0.9 in) rear stabiliser bar.[100] Additional engine bay sound deadening and a new muffler have resulted in reduced noise, vibration, and harshness. Elsewhere, the fitment of lighter low rolling-resistance tyres aids fuel consumption by minimising friction.[101]
"

Went through the same dilemma when buying my second car, Alloytec or SIDI?? I went SIDI and have not looked back! much better engine!!
i had an MY09 SV6 (3.6L Alloytec) and am now driving an MY11 SV6 (3.6L SIDI) and there is quite a difference!! (both are were 6spd manual)
Go the SIDI are you wont regret it!

 

Both of those cars you linked on Carsales are Alloytec.
I know this because the Alloytec has a MAF housing, the SIDI has a smaller MAF sensor that is located in a different design airbox lid.

Mine is an SIDI, and I'm very happy with it, mum has an SIDI SV6, neither of us have had any troubles, however mine does burn through a fair bit of oil, common problem.

 

When it comes to the SV6, all SIDI motors have a 6 speed auto bolted to the back of them.

 

Check the identification in the engine bay. LY7 is alloytec everything is like LFX and LLT are sidi. Apparently a common issue with all direct injection engines not just Holden is that the injectors have carbon buildup and costs and extra $300 to clean. Someone may want to correct me if I'm wrong. I still think the Sidi is better being e85 compliant, more power and greater fuel economy you will make that injector clean cost back multiple times.

 

I haven't heard of the injectors having issues. But you'll find the back of the valves will build up with oil, so it's almost a must to fit a catch can to a Direct Injection motor.

 

How does a catch can stop the back of the valves building up with oil.

 

You have a vent line coming from your rocker cover that goes to the intake system, oils come through this line. This is why you get dirty throttle bodies/inlet manifolds/valves.
A motor with port injection sprays fuel onto the back of the valves, this 'cleans' away some of the oil. But with direct injection, there is nothing to help 'clean' the valves.
Fitting a catch can will catch all the oil vapours coming from the rocker cover, stopping them from entering the intake system.

 

Good to know.

 

According to my owners book the VIN should tell you. Mine's an MY08 so I don't have all the new details, but someone with a newer car should be able to tell you. All start 6G1 (Asia,Australia,Holden) E (VE model) then K/P/L/X (denotes luxury level) then next is letter for restraints fitted (incl airbags etc), then ENGINE (B= alloytec V6, 7= high output V6, N=LPG V6, H=6L Gen4 V8), then security check code, then MY code (7 = 2007, 8= 2008 - and assuming A = MY9.5 looking at the cars you posted) then plant code (L = Elizabeth) finally 6 digit production number.

So 8th digit/letter is the engine. No idea what the SIDI code is. Like I said I've only got an MY08 so my book doesn't cover later models. Guessing V = SIDI by the last car you posted. However that car says "E" for the restraint code, my book says 1-5 for the options of airbags installed. Hopefully someone will update that with info from a later car.

 

everything you want to know is found here ;Holden VE Commodore / Calais

 

As others have said, Alloytech was fitted up to and including MY09.5.

The SIDI engine was introduced on the MY10 model year update.

The Series II model update happened at MY11. At this time, the 3.0L SIDI was E85 compliant, but the 3.6L in the Calais and SV6 were not. This engine was updated to E85 compliance at MY12.

I can only speak for manual SV6's as I have had an MY09 and now an MY11. The SIDI engine has better response, and in the manual, better gearing. Drivability is much enhanced. The Series II update at MY11 also offers significant advances, especially in the SV6. Except for projector headlights, leather seats, assorted chrome and the three window cluster, my MY11 SV6 has all the features of an MY10 Calais plus the option of a manual, LSD and better suspension. I have added the three window cluster, and there is now nothing from the Calais that I would want.

My recommendation would be to go SIDI if affordable, and go further to Series II if you can manage.

Good luck.

 

Agh yes, you are correct. sorry definately is the valves I have heard of having the issues.

 

wait, so the alloytec ALSO had plastic engine shroud that the SIDI's have? Because if you look at the first car the engine bay has a covered plastic shroud?