MotorCityFats Posted July 24, 2011 Report Share Posted July 24, 2011 1997 Lumina 3100... I keep hearing that the 3400 has everything in the same place. Is the swap really that easy... I need a new engine and the price difference between 3100 and 3400 dont really differ. with the difference in years newer is usually better, can I do this swap with a 2005 monte 3400 Quote Link to comment Share on other sites More sharing options...
urbex Posted July 24, 2011 Report Share Posted July 24, 2011 Put in an L67!!!!! Quote Link to comment Share on other sites More sharing options...
BXX Posted July 24, 2011 Report Share Posted July 24, 2011 Put in an L67!!!!! STFU you!!! Yes, the LA1 3400 is pretty much a bolt in swap. Minor PCM reprogramming is required to get the added benifit of the LA1. For the money, you should be able to find a 3.5 LX9 from a 04/05 Malibu/G6 for dirt cheap. However you will need some swap parts to swap it in. Quote Link to comment Share on other sites More sharing options...
Z34guy Posted July 24, 2011 Report Share Posted July 24, 2011 go 3500 or 3900.... or if you want to be different 3.6L DOHC VVT LY7 Quote Link to comment Share on other sites More sharing options...
white4d96 Posted July 24, 2011 Report Share Posted July 24, 2011 You mean the 3 engines that DON'T fit? Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 24, 2011 Report Share Posted July 24, 2011 You mean the 3 engines that DON'T fit? 3500 and 3900 fit just fine. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 24, 2011 Report Share Posted July 24, 2011 ZR1 swap. Quote Link to comment Share on other sites More sharing options...
Dark Ride Posted July 25, 2011 Report Share Posted July 25, 2011 Look what I found, Check this: http://www.3400swap.com/3400%20Swap%20Version%202.5.6.pdf I didnt really read through it that much but it looks like it should help you decide. Quote Link to comment Share on other sites More sharing options...
MotorCityFats Posted July 26, 2011 Author Report Share Posted July 26, 2011 My idea of dirt cheap and others are different... I say 3400 because they are around 700-800 for both and I would rather have a newer engine.... Im not going to touch the PCM... I just want a newer lower mileage engine... with out any swapping of parts.... if it has even 1 part that is not adding wire lengths i will stick with the 98 or 99 3100 Quote Link to comment Share on other sites More sharing options...
BXX Posted July 26, 2011 Report Share Posted July 26, 2011 A LX9 3500 around me is 250 to 300 with 40-60K on them. Figure $500 or so in swap parts and supplies and $100 in pcm tuning and your way ahead of the LA1 Quote Link to comment Share on other sites More sharing options...
jman093 Posted July 26, 2011 Report Share Posted July 26, 2011 Depending on year, there are differences in EGR, injector harness, and coolant pipes and you'll need a tune. There may be differences as well between model lines. I don't know. In all honesty 3100 to 3400 isn't that big of a jump in power to be swapping an engine. If you want simple, just large port swap your 3100. It's easy (I just did it to my bro's 96 GP last week) and should net 15-20hp. If you're serious about making more power than the measly L82 provides look into going 3500/3800/3800SC. Quote Link to comment Share on other sites More sharing options...
MotorCityFats Posted July 27, 2011 Author Report Share Posted July 27, 2011 I dont need power I just need a running engine in my car... from reading that swap PDF... I will just stick with a 3100 and replace all the gaskets.... I just dont like them engines... but I need a running car before winter for the lowest price.... I see no reason to buy a new car when this one that cost me $600 and the only problem is that the engine is shot and knocks and when it ran only got 10mpg... body is real good, trans and suspension are good... the car is in good shape... but engine sounds like turd even before the knock started and has 190,000 miles.... I will start looking for cheap engines..... and try to pull mine out and tear it down and hope I have a screwed bearing somewhere Quote Link to comment Share on other sites More sharing options...
1QUICKHATCH Posted July 27, 2011 Report Share Posted July 27, 2011 I don't think that the OP is looking for all out power in a swap, think they are just looking for a newer engine becase it needs to be done anyway and is just taking the power increase as a bonus! A tune will help to get the best perfomance out of the 3400 but it will run fine on the stock PCM. If you get a 2000+ engine you will need an EGR adaptor or a plenum from a '99 and older 3400. your injectors will need to be swapped in to the 3400, and your lower intake may need to be tapped for the coolant tube fitting if yours is the threaded style. Quote Link to comment Share on other sites More sharing options...
MotorCityFats Posted July 28, 2011 Author Report Share Posted July 28, 2011 It is a FF car.. it dont need more power, If it is like any engine I can remove the EGR... with all the sensor swapping I cant really be sure it will run... I am still getting around to testing all the sensors that have come up with odb-II codes ... the car still runs but starts acting like its going to die after about 10 minutes of running Quote Link to comment Share on other sites More sharing options...
Euro Posted July 28, 2011 Report Share Posted July 28, 2011 I'd just find another 3100 personally. The what, 15hp increase isn't worth it IMO Quote Link to comment Share on other sites More sharing options...
MonteCarloDude Posted July 28, 2011 Report Share Posted July 28, 2011 I'd just find another 3100 personally. The what, 15hp increase isn't worth it IMO Wait untill you drive a bone stock small port 3100 then a tuned LA1 or L82 with LA1 or LG8 intakes. Then it becomes worth it IMO. The top end is wayyyyyyy better. Besides all he would have to get is a 3400 tune or a 3400 PCM, that LA1 should just drop right in. Quote Link to comment Share on other sites More sharing options...
Euro Posted July 28, 2011 Report Share Posted July 28, 2011 They're both slow so what's the difference Quote Link to comment Share on other sites More sharing options...
Jssuper Posted July 28, 2011 Report Share Posted July 28, 2011 Yah, LA1's not any faster than my LG8 in an equal weight car... Buick = Heavy. F-it, if you are going to swap make it mean something... LS4 FTW! Quote Link to comment Share on other sites More sharing options...
MonteCarloDude Posted July 28, 2011 Report Share Posted July 28, 2011 They're both slow so what's the difference Every w-body is slow stock IMO, all depends on how you define slow/quick/fast. But we can save that for W/E. I was just saying it would be well worth it to me to do the swap, much better top end, hell, i walked a 200 HP 3.0 DOHC ford escape from a dig and a roll, just ask birdman! It's good enough for me. Anywho, IMO if the old 3100 is out i would go with a 3400, newer design, quicker, and as far as i know all you would need would be a tune or an LA1/LG8 PCM. On a side note: I would toss new LIM gaskets on it while your at it, and also the oil pump drive shaft o-ring, it's less then $1 and very easy to replace with the LIM off. Good luck, hope to hear you get it going soon! Quote Link to comment Share on other sites More sharing options...
jman093 Posted July 29, 2011 Report Share Posted July 29, 2011 Every w-body is slow stock IMO, all depends on how you define slow/quick/fast. But we can save that for W/E. I was just saying it would be well worth it to me to do the swap, much better top end, hell, i walked a 200 HP 3.0 DOHC ford escape from a dig and a roll, just ask birdman! It's good enough for me. Anywho, IMO if the old 3100 is out i would go with a 3400, newer design, quicker, and as far as i know all you would need would be a tune or an LA1/LG8 PCM. On a side note: I would toss new LIM gaskets on it while your at it, and also the oil pump drive shaft o-ring, it's less then $1 and very easy to replace with the LIM off. Good luck, hope to hear you get it going soon! A 3400 is not drop in. As I mentioned there are differences that he would need to be address. Even going from L82 to LG8 3100 is different. Trust me I just did this a week ago. Quote Link to comment Share on other sites More sharing options...
MonteCarloDude Posted July 29, 2011 Report Share Posted July 29, 2011 (edited) A 3400 is not drop in. As I mentioned there are differences that he would need to be address. Even going from L82 to LG8 3100 is different. Trust me I just did this a week ago. Hmm, i recall reading through 3400swap.com and not seeing anything else that would be necessary if he got a long block with belt driven accessories. As long as they were both OBD2. Then again it's been a while since i have seen that page so i guess i could be wrong. I'm interested in the differences if you would not mind posted them up in W/E. I'm always willing to learn something new about W's. EDIT: Long block with exhaust manifolds i should say, due to the EGR change in 2001(?) IIRC. Or just block it off. Edited July 29, 2011 by MonteCarloDude Quote Link to comment Share on other sites More sharing options...
jman093 Posted July 29, 2011 Report Share Posted July 29, 2011 -The EGR is different. The LG8 EGR valve and the EGR tube were required and some tweaking of the tube was still required. -The coolant tube coming out of the manifold is different and also had to be changed to the LG8. -The throttle bodies are different. You have to use the LG8/LA1 throttle body or take a grinder and make some modifications to your stock one. I didn't want a stock 52mm one and used a 56mm LA1 throttle body, so I had to dissassemble the throttle bodies and mount the gen 1 throttle cable attachment pieces on the LA1 throttle body so I could attach my cables. -The LG8 uses Multec 2 injectors verus the fat old Multec 1's on an L82. I used the Multec 2's, requiring cutting and splicing the 15 injector harness wires because the harnesses are different and do not just plug in. I could have used the crappier Multec 1 injectors and avoided this, but I don't think this would be a good idea on a larger LA1. -And then after I was done, fuel trims were showing very very rich even just going from L82 to LG8. I have a DHP and pulled fueling back about 20% and trims are normal now staying close to zero. These were the differences in using parts from a early design 2nd gen w-body. A 3400 would have to come from a later design 2nd gen, an N-body, Equinox/Torrent, or the less desirable U-body, so there may be other differences between these platforms and a gen 1/1.5 w-body that I did not have to deal with. Quote Link to comment Share on other sites More sharing options...
MotorCityFats Posted July 29, 2011 Author Report Share Posted July 29, 2011 I was hoping to just avoid the 3100 because I feel the design is crap and its an engine that is destined for failure... either way 3100 or 3400 I was going to tear it down and replace oil pump and all gaskets and check bearing tolerances.... but i would like to take my knocking 3100 apart first and find the problem... though I cant see being able to save it for the price of a newer lower mileage engine where ever I find it.... I'm still looking around... the online prices are from 600-900 and include shipping and 1 year warranty.... I also have a number of a guy close by that deals in good quality engines he collects from wrecks Quote Link to comment Share on other sites More sharing options...
ptcfast2 Posted August 1, 2011 Report Share Posted August 1, 2011 -The EGR is different. The LG8 EGR valve and the EGR tube were required and some tweaking of the tube was still required. -The coolant tube coming out of the manifold is different and also had to be changed to the LG8. -The throttle bodies are different. You have to use the LG8/LA1 throttle body or take a grinder and make some modifications to your stock one. I didn't want a stock 52mm one and used a 56mm LA1 throttle body, so I had to dissassemble the throttle bodies and mount the gen 1 throttle cable attachment pieces on the LA1 throttle body so I could attach my cables. -The LG8 uses Multec 2 injectors verus the fat old Multec 1's on an L82. I used the Multec 2's, requiring cutting and splicing the 15 injector harness wires because the harnesses are different and do not just plug in. I could have used the crappier Multec 1 injectors and avoided this, but I don't think this would be a good idea on a larger LA1. -And then after I was done, fuel trims were showing very very rich even just going from L82 to LG8. I have a DHP and pulled fueling back about 20% and trims are normal now staying close to zero. These were the differences in using parts from a early design 2nd gen w-body. A 3400 would have to come from a later design 2nd gen, an N-body, Equinox/Torrent, or the less desirable U-body, so there may be other differences between these platforms and a gen 1/1.5 w-body that I did not have to deal with. Yay! Another L82 --> LG8 swaper! I compiled my own list over at http://www.w-body.com/showthread.php/50562-L82-3100-gt-LG8-3100 after finishing it up a few months ago. I chose it over the 3400 for mainly the reasons you specified (plus my LG8 was a GM crate so that's a no-brainier ). Quote Link to comment Share on other sites More sharing options...
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