What do you guys know about pregen Grand Prix's? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-26-2005, 06:50 PM   #11
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Quote:
Originally Posted by Sol
My friend has a 94 Grand Am with the 3100. We beat the freaking crap out of that car, and it still runs. It has electrical problems. It'* on it'* 2nd transmission. The first one died at about 180,000 miles or so. The car is slowly falling apart, but the engine keeps running strong. It doesn't overheat, and it actually runs well on long trips.

Just look at this pic, and it will answer your questions:



I'm not saying they will all last this long, but for the most part, they are durable motors.
I can only hope that my 3800'* make it that far...

And I must say, I went car shopping with a coworker, we ended up looking at 04 Grand ams... That 3400 supprised me... I was impressed... I drove a couple of others and 1 had the **** beat out of it... The one she bought worked flawlessly... Heck even I liked it..

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Old 04-26-2005, 08:15 PM   #12
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My 90 Z-24 had the 3.1. Power to spare, that was a fun ride. Shoulda kept it.
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Old 04-27-2005, 03:00 AM   #13
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Thanks for all the input guys....

Turns out he got the name of the car wrong; it'* a '94 Grand Am, not Grand Prix. Still, they probably had the same 3100 and 3400 options, in addition to the 2.2 four cylinder? I'm not sure which one it is, but I guess his dad bought the car so it'* too late for second guesses. We'll see how it turns out.
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Old 04-27-2005, 03:11 AM   #14
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A '94 GA will have the 3100 if it has a V6. They didn't get the 3400 until '99.
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Old 04-27-2005, 03:15 AM   #15
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Thanks for the heads-up. Was I correct in guessing that the four cylinder option is a 2.2?
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Old 04-27-2005, 03:17 AM   #16
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Quote:
Originally Posted by big_news_1
Thanks for the heads-up. Was I correct in guessing that the four cylinder option is a 2.2?
It SHOULD be a 2.3 Quad4.
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Old 04-27-2005, 04:42 AM   #17
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Quote:
Originally Posted by OLBlueEyesBonne
Stay away from the 3100'* with over 60,000 miles -headgaskets, heads, trannies, pistons -they all go at about 100k.
The 3.4 is a total PITA -timing chains have been known to break less than 10k after being newly installed. Over-all the 1994-1996 GP'* aren't the greatest. If you can find a nice 1990-1993 with a 3.1 that runs good you have a good one. The 3.1 GP'* from 1990-93 were probably the most reliable GP'* between 1988 and 1997 when the 3800 became available.
Great, now I'm confused and worried. My daughters "new" 01 GP doesn't have the 3800. It does have alot of miles (140,000). Is this going to be a problem. The previous owner maintained it regularly, all highway miles. They had replaced the intake gasket at around 90,000. Maybe a water pump also, can't remember.

I thought it has the 3100. Did they even come with a 3400? My other daughter boyfriend has an Alero that has a 3400 so I am confused.
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Old 04-27-2005, 05:07 AM   #18
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Quote:
Originally Posted by OLBlueEyesBonne
Stay away from the 3100'* with over 60,000 miles -headgaskets, heads, trannies, pistons -they all go at about 100k.
The 3.4 is a total PITA -timing chains have been known to break less than 10k after being newly installed. Over-all the 1994-1996 GP'* aren't the greatest. If you can find a nice 1990-1993 with a 3.1 that runs good you have a good one. The 3.1 GP'* from 1990-93 were probably the most reliable GP'* between 1988 and 1997 when the 3800 became available.
You're pretty damn misinformed, my friend. First off, the 3.4 DOES NOT have a timing chain. It'* a timing belt, non-interference (except for 1996-1997) 60* V6 engine. Timing belt replacement is every 60k.. As for your little bout on 3x00 reliability, there are NUMEROUS 3100'* on W-body.com with well over 150k, some in the 200k range. I've NEVER ONCE heard of a piston issue with one. EVER. Never heard of a timing chain problem either. The only issue 3100'* have is the GM V6 upper intake issue. Headgasket failure is pretty rare. The 3800 wasn't available in the Grand Prix until 1997. The only W-body that could get it before that was the Regal, which started getting it in 1991. W-body V6 Grand Prix engines are as follows:

1988-mid 1989: 2.8L MPFI Gen II (LB6)
1989-1990: 3.1L MPFI V6 Gen II Turbocharged (LG5)
mid-1989-1993: 3.1L MPFI V6 Gen II (LH0)
1991-1996: 3.4L Twin DOHC (LQ1)
1994-2003: 3100 SFI (3.1 Gen III) V6 (L82)
1997-2003: Series II 3800 N/A (L36)
1997-2003: Series II 3800 Supercharged (L67)
2004+: Series III 3800 N/A (L26)
2004+: Series III 3800 Supercharged (L32)

Oh yeah.. the 3100'* use the exact same 4T60e the Bonneville'* got with the exception of an intermediate shaft and a different gear ratio. So.. how many Bonnevilles just randomly have transmission failure?

Quote:
Originally Posted by sonoma_zr2
Great, now I'm confused and worried. My daughters "new" 01 GP doesn't have the 3800. It does have alot of miles (140,000). Is this going to be a problem. The previous owner maintained it regularly, all highway miles. They had replaced the intake gasket at around 90,000. Maybe a water pump also, can't remember.

I thought it has the 3100. Did they even come with a 3400? My other daughter boyfriend has an Alero that has a 3400 so I am confused.
Your daughter'* Grand Prix SE has a 3100. The Grand Prix never got the 3400. 2001 was the year that they fixed the intake manifold failure problem. So, you're pretty much good to go. Waterpump replacement is normal. If the headgaskets have already gone, then you should be allright for a good long time. 3100'* are pretty much bulletproof.
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Old 04-27-2005, 10:00 AM   #19
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I have seen a few torn down for that piston issue... Its rare and most that do have the problem can live with it, without any issues throughout its service life...

I do agree that head gaskets are pretty rare, and most of the time are due to owner neglect... I have seen several that were due to the owner having a bad water pump and severely overheating the engine...

The 3100M,3100J and 3400E are all pretty good engines for the most part... The 3100,3400,3500(chevy) and the old 3.0,3.8, 3800C,3800L,3800K,38001, are all why I like the GM V6'* soo Much...

Just a comparison note, Has anyone ever seen the bottom end of a GM V6 as compared to a Ford 3.0 or 4.0 60* V6... Its not pretty...

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Old 04-27-2005, 11:19 PM   #20
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digitaloutsider pretty much hit it right on the head. The 3100 is just as reliable as the 3800 IMO. All engines have their problems...can we say lower intake gaskets? There is a particular Grand Am we work on in my Auto Tech class that one of the teachers drives and last time we worked on it it had around 360,000 miles or so on it. Its a '94 with a 3100 and the 4T60. I think he JUST had the tranny rebuilt for the first time and the engine has never been torn down very far, I don't think it even ever had the lower intake gasket leak. The most major thing I've ever seen that needed to be replaced on it was the water pump, which is like $22 and takes 15 minutes to do.

And I definately agree with the tranny part. Why would the exact same tranny that Bonnevilles have be weaker when mated to a weaker engine on a lighter car? Trannies are really not a problem on 3100'*. Do they fail, yes, everything will fail on a car at some point. If you want to talk about weak trannies, then maybe we should talk about the 440T4 that were used on most Gen II 3.1'*. I can post some pics of the parts that came out of mine...and then the other parts that came out of it a few weeks later after it was rebuilt and couldn't stand up to the torque yet again.

Quote:
The 3.1 was an MPFI, and it didn't have the roller lifters, it was still a conventinal lifter design... And was good for roughly 140 Hp, Torque was good at 185 Ft Lbs tho...

The MPFI system fired the injectors in multiples or 2 at a time if memory serves... But all of them I have seen did well on fuel, and were happy to scream when called on... Problems with the motors were few and far between with the exception of motor mounts and an oil leak that was very easy to cure...
Yup, the 3.1 has flat tappet lifter and obviously a flat tappet cam (not allowing fast ramp rates). They were rated for 140hp/180ft.lbs. The MPFI system fires the injectors in banks. It fires the front bank at one time and the rear bank at one time. So 3 injectors at a time, if I understand correctly. Problems with Gen II 3.1'* are very few and far between. When I had the heads pulled off the STE the bottom end looked brand new and everything looked great...not too bad for knowing how badly I beat the crap out of it beforehand, and that it hit over 300 degrees a few months prior. (which is what warped the head thus blowing the headgasket causing me to need to tear it down)

Shawn
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