dalejw3 Posted December 3, 2004 Report Share Posted December 3, 2004 Hey, I know this will sound funny, but how difficult would it be to take out a 3.4 DOHC and put in a 3100 v6. the 3.4 has cracked heads and I don't think I can afford to put in a 3800 so I just wondered how much trouble a 3100 would be to put in. the car is a 1996 Monte carlo. the 3100 is also a '96 and comes with the computer and I can get the harness if needed. Thanks Quote Link to comment Share on other sites More sharing options...
patgizz Posted December 3, 2004 Report Share Posted December 3, 2004 computer, harness, not a bad job at all. pretty much plug and play, and you need to get the motor mounts for the 3100. Quote Link to comment Share on other sites More sharing options...
EurosportZ34 Posted December 3, 2004 Report Share Posted December 3, 2004 YUP...this does sound funny! ok, for starters why would you "downgrade" from the 3.4 DOHC to the 3100 SFI? i'm not seeing a light at the end of the tunnel here. also, if your going the 3x00 route at least get the 3400 or 3800 SFI...the lil' 3100 just won't do it for me with all the other greater possibilities out there. i'm sure a j/y would have a 3400 SFI for a decent price. Quote Link to comment Share on other sites More sharing options...
dalejw3 Posted December 4, 2004 Author Report Share Posted December 4, 2004 because I have a feeling that that would not be a plug and play swap and I would need the 4t65E tranny, and also, petes auto parts has a 96 3100 for 750 dollars with the computer. I haven't checked on a 3800 but I wasn't shure if that would be as easy of a swap as the 3100. I just want a new car and I found one that is a good deal but has a bad 3.4 DOHC. The 3100 would be faster than my current 3.1 anyway. Quote Link to comment Share on other sites More sharing options...
Canada Posted December 4, 2004 Report Share Posted December 4, 2004 At least get a 3400.......... It's almost the SAME swap as a 3100, and is NEARLY as fast as an LQ1 auto in the 1/4 (due to more low end grunt). Quote Link to comment Share on other sites More sharing options...
Aaron Posted December 4, 2004 Report Share Posted December 4, 2004 There are some heads+cams+towers on Ebay right now for like $85. And in a junkayrd they'll be cheap. If you are inclined enough to go for a swap, at least look into just getting some used heads... I was going to argue with your 3400 comment, then I thoguht about it. I drove a Grand Am GT for a little while(about a week), and I was surprised. The low and mid rnage tq was great, even if it did fall off and the high side. Anyways I got a race with a very slightly modded Gran Prix GT, and we were side by side. The 3400 surprised me, even if I am pro DOHC. Quote Link to comment Share on other sites More sharing options...
95 3-4 Posted December 4, 2004 Report Share Posted December 4, 2004 I would try to get the pullout for $500 or under, other than I think its a step in the right direction, tho I like the gen 1 3.1 better than the gen 2 for reliability's sake I believe if you get the same year engine and harness it will plug right into your passenger side bulkhead connector, and getting the engine out is childs play, most junkyard engines come with the mounts cuz thats the easiest way to get it out, or the give you part of the k member with the mount via hotwrench Quote Link to comment Share on other sites More sharing options...
patgizz Posted December 4, 2004 Report Share Posted December 4, 2004 that yard is bending you over for $750. i bought my under 40k mile 2000 3400 with harness and ecm out of an impala for $199. thats too low, but you shouldnt be paying $750 for a 96 3100. not sure what the yards are like by you but i can get a harness and computer out of anything i want for $100 if i pull it. Quote Link to comment Share on other sites More sharing options...
95 3-4 Posted December 5, 2004 Report Share Posted December 5, 2004 I got 2 good used heads for a buck a pound+shipping Quote Link to comment Share on other sites More sharing options...
asonofabeachnj Posted December 7, 2004 Report Share Posted December 7, 2004 3.4 to a 3100 swap is not all that crazy, yea the 3.4 due to the ohc makes more power but the 3100 requires alot less maintanace and parts are generally cheaper if something does happen to break due to less overall parts to the pushrod engine. 3400 are problem engines, almost everyone i know with grand am gt's have that leaking intake gasket problem. I mean if i had the money id upgrade to a 3800 but thats me. Quote Link to comment Share on other sites More sharing options...
Aaron Posted December 8, 2004 Report Share Posted December 8, 2004 So are you talking about a 3.4 TDC or a 3400? Which is it? Quote Link to comment Share on other sites More sharing options...
GPXSS Posted December 8, 2004 Report Share Posted December 8, 2004 if you want a direct swap, you will need to find a 96 Wcar with a 3100.. get the ECM and entire harness from that. If you dont, you run the risk of having to do alot of extra wiring. Easiest would be to fix your existing engine. Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted December 8, 2004 Report Share Posted December 8, 2004 3400 are problem engines, almost everyone i know with grand am gt's have that leaking intake gasket problem. Nevermind 3100's do the exact same thing.. If you're going to bastardize your car, just give it to me, and you can have my Grand Prix.. it has a 3.1 Quote Link to comment Share on other sites More sharing options...
Aaron Posted December 9, 2004 Report Share Posted December 9, 2004 3400 are problem engines, almost everyone i know with grand am gt's have that leaking intake gasket problem. Nevermind 3100's do the exact same thing.. If you're going to bastardize your car, just give it to me, and you can have my Grand Prix.. it has a 3.1 I was gonna say. I've always heard that as far as maintenance goes, the 3100/3400 are equal, and both pretty decent. Quote Link to comment Share on other sites More sharing options...
fargo_182 Posted December 9, 2004 Report Share Posted December 9, 2004 just to let you all know the 3100/3400 are the basicaly the exact same engine with different displacement. they have the same block the same everything. check out the v6z24.com forum under performance and you will see what I mean everything is basically interchangeable. and the 3.1 block can be used on the 3X00 swap/ hybrid for both 3100 and 3400 I dont see why you think the 3100 is so much less worthy of a swap than the 3400? 3800 maybe.....(oh yea same block too) but the 3100 and 3400 are very close to identical couple hp's here and a bit more torque difference. you might need custom made engine mounts though...the 3.4 or 3x00 will not match up, i guess unless you weld them together. Quote Link to comment Share on other sites More sharing options...
skiiirt Posted December 9, 2004 Report Share Posted December 9, 2004 U got a lift? Last time i changed a 3.4 it didnt want to come out of the top Quote Link to comment Share on other sites More sharing options...
99RegalGS Posted December 9, 2004 Report Share Posted December 9, 2004 I dont see why you think the 3100 is so much less worthy of a swap than the 3400? 3800 maybe.....(oh yea same block too) but the 3100 and 3400 are very close to identical couple hp's here and a bit more torque difference. Woah Woah Woah, the 3800 is NOT the same block at all. The 3800 is a 90 degree V6 and the 3X00's are 60 degree V6's. Completely different. Quote Link to comment Share on other sites More sharing options...
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