fat4t8 Posted October 17, 2004 Report Share Posted October 17, 2004 The engine in my 1996 Grand prix acting up seriuously with low compression in #5 and poor oil pressure. I am considering swaping in another GM 3100. I have replaced and built several V8 Ford and Chev motors, but I am relatively unfamiliar with the differences in these 3100's. I would be just replacing the long block and using all my current electronics, accessories ect. I would like to find a newer/low milage used engine to swap in place of mine. I know these came in a bunch of differnt GM cars. Which ones and years would I be able to take the long block assembly from. Are there any significant differnces I should be aware of? Thanks Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 17, 2004 Report Share Posted October 17, 2004 depending on where you are, I've got a 3100 already out of a car.... (I'm located in Minneapolis, MN) --Dave. Quote Link to comment Share on other sites More sharing options...
THe_DeTAiL3R Posted October 17, 2004 Report Share Posted October 17, 2004 Any 3100 should work without much problems. The newer ones (2000+?) have better flowing intake or something and a few other things, and rated at 175HP vs. 160hp. Personally, I'd find a 3400 for extra power. Quote Link to comment Share on other sites More sharing options...
Goph Posted October 18, 2004 Report Share Posted October 18, 2004 do a L67 swap if you have the money, you will thank me later. I wish so much i did that when my engine blew rather then just putting in another 3100. Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 18, 2004 Report Share Posted October 18, 2004 ... I'm gettin' tired of hearing about "just do the l67 swap" if you haven't done the swap yourself, and have no knowledge of what it would take to do the swap, please stop recomending it to EVERYONE who says they need a new engine. the L67 is NOT the best engine on the planet, if you're really going to go thru the trouble of putting the L67 in there, why not just get the adapter plates, and put in a smallblock chev motor - you'll get more power, for a LOT less money. --Dave. Quote Link to comment Share on other sites More sharing options...
OldsmoBeast Posted October 18, 2004 Report Share Posted October 18, 2004 ... I'm gettin' tired of hearing about "just do the l67 swap" if you haven't done the swap yourself, and have no knowledge of what it would take to do the swap, please stop recomending it to EVERYONE who says they need a new engine. the L67 is NOT the best engine on the planet, if you're really going to go thru the trouble of putting the L67 in there, why not just get the adapter plates, and put in a smallblock chev motor - you'll get more power, for a LOT less money. --Dave. Would it fit? Quote Link to comment Share on other sites More sharing options...
slick Posted October 18, 2004 Report Share Posted October 18, 2004 Just swap in a 3400. You can use your 3100 wiring and ECM, plus you'll pick up some HP too. Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 18, 2004 Report Share Posted October 18, 2004 I think it fits, I measured my 88 Regal, and size would have allowed it to be in there, but we didn't know how it'd like being against the steering rack, and what we'd have to do for custom headers and such - I had some strange ideas, but no money. --Dave. Quote Link to comment Share on other sites More sharing options...
slick Posted October 18, 2004 Report Share Posted October 18, 2004 Would the tranny fit too?!?!?! Which would/can you use for this??!!! Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 18, 2004 Report Share Posted October 18, 2004 you can use the FWD trans that comes in the car stock, but you have to use the adapter plates supplied from http://www.v8archie.com I never tried to install one, so I don't have the expirence, I was just saying, if you're gonna go thru the trouble of cramming an L67, why not cram a SBC in there, hell a built 383 will put nearly ANY L67 to shame (I say Nearly, because there's exceptions to every rule) --Dave Quote Link to comment Share on other sites More sharing options...
OldsmoBeast Posted October 18, 2004 Report Share Posted October 18, 2004 you can use the FWD trans that comes in the car stock, but you have to use the adapter plates supplied from http://www.v8archie.com I never tried to install one, so I don't have the expirence, I was just saying, if you're gonna go thru the trouble of cramming an L67, why not cram a SBC in there, hell a built 383 will put nearly ANY L67 to shame (I say Nearly, because there's exceptions to every rule) --Dave I don't know if theres much "cramming" involved in swapping in an L67...I thought they bolted right in, but the main issue was wiring. Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 18, 2004 Report Share Posted October 18, 2004 the main issue really is wiring, but if you're doin' a SBC swap, you just cut the wires. --Dave. Quote Link to comment Share on other sites More sharing options...
slick Posted October 18, 2004 Report Share Posted October 18, 2004 you can use the FWD trans that comes in the car stock, but you have to use the adapter plates supplied from http://www.v8archie.com I never tried to install one, so I don't have the expirence, I was just saying, if you're gonna go thru the trouble of cramming an L67, why not cram a SBC in there, hell a built 383 will put nearly ANY L67 to shame (I say Nearly, because there's exceptions to every rule) --Dave Hmm.... I bet this swap would be somewhat easier than the L67 swap. No wires. Custom motor brackets, but that not a big deal. I like your thinking! Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 18, 2004 Report Share Posted October 18, 2004 I'm a twisted person - I'm always thinking abstract like that. --Dave. Quote Link to comment Share on other sites More sharing options...
DiscoStudd Posted October 18, 2004 Report Share Posted October 18, 2004 Yep, if you "cut the wires" to go with an SBC, you'll probably want to switch back to the vacuum-shifted trans as well ... IMHO, doing the L67 swap is best left for someone with a ton of time on their hands, and plenty of money to fund the project. I've seen what some of these guys spent to get their cars fully functional. We're talking upwards of $4000 (sometimes more!) Swapping a 3400 in place of a 3100 makes the most sense to me. You get an instant jump in HP (not much but every pony counts!) Not to mention you can get a low-mileage 3400 complete for under five bills. As mentioned previously, it bolts directly in place of the 3100 and you can use the same PCM, Trans, wiring, and all of the accessories. When the 3100 in both my Lumina and Grand Prix go off to the big boneyard in the sky, I'm stuffing 3400's in their place for sure! After, of course, I replace the Intake Gaskets first ... Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 18, 2004 Report Share Posted October 18, 2004 I'd replace the head gaskets and timing chains too, if I were to swap in a 3400, not because those parts are bad, but because it's out of the car, so it's gonna be a WHOLE lot easier to get those things outta the way to help assure a long life engine. --Dave. Quote Link to comment Share on other sites More sharing options...
DiscoStudd Posted October 18, 2004 Report Share Posted October 18, 2004 I'd replace the head gaskets and timing chains too, if I were to swap in a 3400, not because those parts are bad, but because it's out of the car, so it's gonna be a WHOLE lot easier to get those things outta the way to help assure a long life engine. --Dave. Makes perfect sense seeing as the intake manifold will already be removed. I'd go with FelPro Head Gaskets for sure. I put a FelPro HG on my old 93 Cavalier 4 1/2 years ago when the HG went out at 146K (it was a GM replacement installed at 72K.) I sold the car to a friend of mine 1 1/2 years ago, and he has it up to 252K presently, and that HG hasn't popped yet! 106K+ out of a FelPro vs 74K out of a stock part... Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted October 18, 2004 Report Share Posted October 18, 2004 I'm a FelPro fan it's what most of the top-alcohol dragster cars have in 'em --Dave. Quote Link to comment Share on other sites More sharing options...
Vegeta Posted October 18, 2004 Report Share Posted October 18, 2004 holy fuck, how did I not get involved on this one:P Quote Link to comment Share on other sites More sharing options...
GPRACER Posted October 18, 2004 Report Share Posted October 18, 2004 you can use the FWD trans that comes in the car stock, but you have to use the adapter plates supplied from http://www.v8archie.com I never tried to install one, so I don't have the expirence, I was just saying, if you're gonna go thru the trouble of cramming an L67, why not cram a SBC in there, hell a built 383 will put nearly ANY L67 to shame (I say Nearly, because there's exceptions to every rule) --Dave 383 stroker! I like the way you think. Quote Link to comment Share on other sites More sharing options...
Goph Posted October 18, 2004 Report Share Posted October 18, 2004 Yep, if you "cut the wires" to go with an SBC, you'll probably want to switch back to the vacuum-shifted trans as well ... IMHO, doing the L67 swap is best left for someone with a ton of time on their hands, and plenty of money to fund the project. I've seen what some of these guys spent to get their cars fully functional. We're talking upwards of $4000 (sometimes more!) Swapping a 3400 in place of a 3100 makes the most sense to me. You get an instant jump in HP (not much but every pony counts!) Not to mention you can get a low-mileage 3400 complete for under five bills. As mentioned previously, it bolts directly in place of the 3100 and you can use the same PCM, Trans, wiring, and all of the accessories. When the 3100 in both my Lumina and Grand Prix go off to the big boneyard in the sky, I'm stuffing 3400's in their place for sure! After, of course, I replace the Intake Gaskets first ... if i would have spent 4k on a L67 swap it would have been less then what this car has in it for repairs and what it need also. Quote Link to comment Share on other sites More sharing options...
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