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Unread 03-01-2011, 01:03 PM   #1
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Default General thoughts on some things.

Ok just wondering your thoughts on some different engines and cars.


2005 Cobalt LS vs 2007 Impala LT vs 2003 Impala LS....which is best and which is worst in terms of reliability and quality?

The following GM engines(if you hate GM you need not apply).

3.4L V6(personally never cared for them)
3.8L V6(loved them, although never owned a car with one)

3.5L V6(In the current impala, know nothing about it)
3.9L v6(also in current impala, know it was in the uplander minivan, but other than that know nothing about it)

Just wondering your thoughts on the best motor of those and just opinions on the 3.5 and 3.9.
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Unread 03-01-2011, 07:38 PM   #2
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GM 3.8s (that would be a 3800 Series II) are known by everyone who knows beans about cars, including everyone on this board, to be one of the best motors GM has ever built. Many would go so far as to put them on the top ten list of most reliable motors in history.

3.4s are decent motors, but did have some head gasket problems.

The current 3.5 comes in 2 versions, flex fuel and regular. It's a cross between the 3.9 and the 3.4. It's a very good engine, however. Same deal with the 3.9.

As for the Cobalt vs Impala, i'd be leaning a little towards the Impala, but both are great engines. The Ecotecs don't have the best reputations, but i don't have a problem with them, in my experience they've got no major issues. As far as quality goes, that would definitely go to the Impala, it's common knowledge that Cobalts are built pretty cheaply, specifically the interior. I'd say the 07 and 03 Impalas would be VERY close in quality and reliability, if cared for.

So TL;DR, 3.8 > 3.5 = 3.9 > 3.4.
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Unread 03-01-2011, 07:56 PM   #3
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Quote:
Originally Posted by wierdo124 View Post
GM 3.8s (that would be a 3800 Series II) are known by everyone who knows beans about cars, including everyone on this board, to be one of the best motors GM has ever built. Many would go so far as to put them on the top ten list of most reliable motors in history.

3.4s are decent motors, but did have some head gasket problems.

The current 3.5 comes in 2 versions, flex fuel and regular. It's a cross between the 3.9 and the 3.4. It's a very good engine, however. Same deal with the 3.9.

As for the Cobalt vs Impala, i'd be leaning a little towards the Impala, but both are great engines. The Ecotecs don't have the best reputations, but i don't have a problem with them, in my experience they've got no major issues. As far as quality goes, that would definitely go to the Impala, it's common knowledge that Cobalts are built pretty cheaply, specifically the interior. I'd say the 07 and 03 Impalas would be VERY close in quality and reliability, if cared for.

So TL;DR, 3.8 > 3.5 = 3.9 > 3.4.
This. The only thing the 3.5/3.9 have on the 3.8L is better technology and higher output but I'd rather have the 3.8L.

I have to say both the 03 and 07 Impalas are good looking cars as far as large front drives go.
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Unread 03-01-2011, 09:29 PM   #4
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This. The only thing the 3.5/3.9 have on the 3.8L is better technology and higher output but I'd rather have the 3.8L.

I have to say both the 03 and 07 Impalas are good looking cars as far as large front drives go.
Not sure about that the Current 3.5L puts out more HP and TQ then the 3.8L ever did NA. And the 3.9L eclipses them both with 90% of it's torque available from 1500-5500 rpm's. Both motors are based off the old 3.4L platform but carry nothing else similar. Both also feather VVT and DOD.
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Unread 03-01-2011, 11:39 PM   #5
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Not sure about that the Current 3.5L puts out more HP and TQ then the 3.8L ever did NA. And the 3.9L eclipses them both with 90% of it's torque available from 1500-5500 rpm's. Both motors are based off the old 3.4L platform but carry nothing else similar. Both also feather VVT and DOD.
And they dont blow gaskets all the time like the 3.1/3.4...
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Unread 03-02-2011, 01:16 AM   #6
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I have worked on quite a few 3.4L, but same with 3.8L(intake gaskets seemed to be common in the 90s from them).

Good to hear the new 3.5/3.9 are better than the 3.4.

I am reallly thinking of trading in my cobalt for an impala.
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Unread 03-02-2011, 10:44 AM   #7
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IMO, I would. The new Impalas are extremely comfortable and roomy if you're not mutantly huge. I drove in an old friends Cobalt when I was in California and it just felt cheap.
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Unread 03-02-2011, 12:13 PM   #8
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IMO, I would. The new Impalas are extremely comfortable and roomy if you're not mutantly huge.
This. Very comfortable car, doesn't feel cheap, it does have a granny shifter but that's nothing. It may be a little sluggish(compared to my car) , but for comfort its great. Going over a bump is like stepping on a floor made of marshmallows.

As for the Slowbalt...I do not recommend, because as mentioned above, it is common knowledge that Cobalt's aren't very good cars, unless you are considering an SS that is 08 or newer.
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Unread 03-02-2011, 11:35 PM   #9
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^^nobody ever said they're not good cars, they're just not fantastic, and they're cheaply built.
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Unread 03-03-2011, 03:03 AM   #10
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You couldn't sell me a turbo car......if I was buying an SS it would be a supercharged one.


Yeah I want a larger, more comfortable car. I would also like to be able to get the car seats in, and I think I will be able to. Sadly for the money I will probably end up with the 3.5L.
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