Before I get flamed and chewed out for this topic let me explain.

I have searched and all I find is don't bother do the 3.4 pushrod one, its easier, plus you have to fab the wheel wells for the 3.4 twin cam.

Well I was wondering if anyone actually measure the engine to see if it wouldn't fit for sure?

Is the starter on the wrong side in the 3.4DOHC application as well?

Just curious, I don't even own an F-body right now, I just felt when searching through for a friend I noticed too much of "Its too wide, I looked" But infact I read in the Fiero boards that its the same width and overall height, just that is the same width for more duration then the 2.8. So basically the 2.8 has a fat ***, and the 3.4 DOHC is fat all over.

I don't want people to go on about wiring problems, I just want to know if there is hard evidence out there on it not fitting. I am sure there is, but I couldn't find it in a search.

 

The DOHC 3.4 is a tad bigger, the plastic garbage all over the engine doesent help either. Could it fot a 3rdgen? Yes it could. The starter isnt a big issue but bolting it where it can turn the flywheel over is. I'm sure a custon bellhousing could be made, I wouldent want to foot the bill. IMO the DOCH 3.4 does run good in little cars, moves real quick actually but again the fab time vrs power output is IMO a 3.8 SC engine could be made to fit with less hassle and more power but thats my opinion but that isnt what you asked about.

YES IT CAN FIT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! it fits in a cavilier and there no differece between the engine copartment in 4cyl's and 6's.

 

I "think" someone was/did measure the 3.4dohc and measured the 3rdgen bay. I belive it would fit, but major custom parts would be needed. Headers, starter, bellhousing, intake, motor mounts, wiring.

I'm all for orginal, being as I had a s10 truck with a l32. I was the 3rd one I found in usa and canada. I never saw pictures of theirs either, just word of mouth, and getting advice.

If you want to try it, go for it. Well do what we can to help. But many other swaps you could do easier, and get more power. And no, im not talking a v8.

 

Thanks guys,

I was just wondering if it fit. Its one of those things I am researching, always looking into different things, wether its for an F-body or another plate form. I get an idea I have to figure it out, but often find you need facts and opinions from others on the way.

I figured my research would end if I had to custom fit the wheel wells. But if it will fit between wells, then I can continue looking into this engine; Claimed to be the most forgotten GM performance engine.

 

Man, I sure wish I had one to dump into my wife's car (96 GP)... But in my GTA, no, I'll stick to 8 cylinders, thanks.

 

I really need to go buy a tape measurer cause i've been really curious as to the width of the 3.4L DOHC motor. It is a funny looking block to say the least. Here at my school we have two DOHC 3.4L's upstairs in one of the automotive classrooms, my teacher apparently hates the lil' engine, i have no experience so i have nothing to say. When i did say they're kinda funny looking, it's cause the block deck surface has a set of "heads" bolted to it, then ontop of the heads is anotehr piece that houses the cam and "lifters". You can tell that the two pieces are seperate and it makes the heads look incredibly tall. Don't know however if width would be the major problem, or if it would be height. As far as width goes, i'm wanting to measure my northstar and see how wide it is in compaarison to the engine bay. Hopefully not to wide, i'll see if i can get some measurements done tomorrow on my break from work or something.

 

Good, I want to see some measurements on a 3.4 DOHC. I would love to see how wide it is. I read its no taller or wider then our 2.8's, just fatter. So we'll see.

 

I measured the 3800, widest part is the outside of each exhaust manifold flange. Should be interesting by the frame rails, depending how high the motor will sit. We've seen pics of the northstar in a 3rd gen (racing car that is) but if that fit, the DOHC "should" fit too.

 

I saw pics somewhere of a Northstart fitting in. I am more so concerned about the exhaust manifolds I can mod those easier then most other parts though. Its where the alt. and pulleys on the bottom I think that would interfer the most with the setup. (picture to show)

I thought this might help you out some Project: 85 2.8. I stumbled on it the other night.
http://www.cardomain.com/memberpage/400337/4

 

I think the measurement I had for teh width was 28", slightly wider than the 3.4, yeah...28".

:hail: :hail: :hail: :hail: :hail: :hail: :hail: :hail:

 

Project:85 2.8
I thought maybe you found it before. But I guess not.
You should try to get that guy to join the boards. He would probably have a lot to bring to the V-6 community.

 

working on it now

 

check out www.w-body.org and look at the message board

I have a 3.4DOHC its kind of intimidating for me to work on but from what i read on the board its a really good engine

 

I have a 3.4DOHC its kind of intimidating for me to work on but from what i read on the board its a really good engine

That's almost 100% correct & also why GM dumped it, back then (early 90's).
It wasn't a cost effection "on the street design", back then.
BUT GM is REINTRODUCING THIS EXACT UPDATED POWERTRAIN IN THE NEW 2005 CADDY'S!
Technology, production efficency & customer/marketplace demand certainly helped.

When I was doing the 2.8->3.4 long block swap boogie in the Firebird, I was offered one for $700.
Saw picture/illustration.
Kept shopping until I came upon the 40,000 used running 3.4 for $800. No engineering degree required.
I had to pass on all the fabbing I needed for the open hood cool factor. And also pass Calfornia smog test easy. The 93-95 F Body 3.4 was my solution.
IF there is a new car show in your town, ya may see it on tour circuit.
IF I get discount tickets & attend LA car show, I'll probably see one.
I kinda do want to see the new FORD GT40! The originals are the extremely #1 Ford I do want to own. Next to a 427 Cammer in a 1966 Mustang Fastback, running a Bubble Top Hood. Yes, Candy Apple Red.

 

The 3.4 was supposed to make aroudn 240hp or so from what I heard, but at the time they were unable to get their FWD trans esp Tremec's 5 speed) to hold up to the power (and most of the 3.8 SC GTP owners will concede that GM still can't get a trans to last under the L67), so the motor was detuned to 215hp.

Whats also interesting is that the 3.4 had 5 cams - 4 overhead and 1 blank in block cam that turned the overhead cams, since the 3.4 DOHC employed basically a standard 3.1 pushrod block. See, so now when the ricers mention how they have 4 cams, you could 1 up them

 

it has 5 cams?? dam.... i'll stick with my 1 cam camaro

 

It's the Spinal Tap of engines, "See, the cams go up to 5, that's one more iddin it?."


edit: and btw Joe_L, that dude still hasn't gotten in touch w/me yet on his swap.

 

Anyone know if the FWD's came with a single cam 3.4L? I'm looking to replace the 3.1 in a Corsica. If not I'll go with a mid 90's 3.1... 160hp vs 135hp

 

majority of all the 60* V6 engines are single ( & lonely) cams

 

Yeah, GM started using the 3.4 in FWD regularly in like 96 or 97ish. The Alero and Grand Am had them, also the minivans I believe, and probably a few others I forgot about.

 

Ok my other question is wether the swap is performed like the 3rdgen swap...

I should be able to perform the 2.8 -> 3.4 swap boogie with the same results as if it was an F-body. I don't wanan have to use the 3.4 intake, ecm, wiring etc. Otherwise I'll go with the later 160hp 3.1.

I tried asking on Corsica/Beretta boards but this board is far more helpful. Thanx Guys :-D

 

Logic would dictate that
you are (in the end) only swapping bottom end long blocks.
Why shouldn't the stuff that was removed from dead carcus be able to bolt right back up to other willing party?
That's what I did to my 2.8/3.4s.
I used 1995 3.4s, had them dressed just as came out of the F body, stripped them to accept the original vehicle 2.8 induction/ignition/water pump-timing chain cover-oil pan/pulley accessory stuff.
IN the end, there are very subtle differences & they must be addressed to ensure a sanitary swap.
I doubt you'll be first to do this (FWD long block swap boogie side stepping!), so it must be (as is the 2.8->3.4 long block swap boooogie! that I wrote) kinda "simple". I consider myself an "automotive idiot", too! Problem is I keep figuring out how "they" do "it" so I can, too!
Your only FWD swap problem may be the ignition system swap detail part. Rest should be piece of cake.

 

I'm not sure if the motor mounts in a FWD 3.4 will be in the correct location though.

 

There not going to be, but thats not because its FWD. Any engine that is being put into a car that wasnt equiped with it will not just "bolt on" major modification will be needed.

 

well I'm gonna jump in here and clear some things up.

the 3.4 DOHC, has no aftermarket.

a single lonley guy out there went and made his own headers, there's a cam timing mod trick out there, and a few mods from RSM Racing that don't do much. Basically the best 3.4 DOHC out there in a W-body (very compareable to a f-body of 82-92) is like mid 14's, and that's after a ton of fab work.

They also suffer from having alot of upkeep (maintainance) needed to keep them happy.

and yeah, in development stages they had 275 horses, and were even slapped in a FWD Camaro. Yes, FWD.

Hydramatic couldn't make a good trans back then, they re-worked the 440-T4 and it became the 4T60 and the 3.4 made 200hp auto/210stick initially, by '96 it had 215hp in automatics only (94-96, no manual trans)

and the tranny's aren't all that bad now.
4T65HD-E that's used behind the L67 (3.8 supercharged series II) is quite strong, they are a little underrated, and the first thing that fails is usually the diff, but that's after low 13's and slicks. slap in a Intense Racing diff. and you're good till the internals fail (should be low 12's by then) --- this is how it is in a grand prix.

the tranny's are OK, it's the diff that usually fails.

I'm getting 2.0 60' times on street tires, and I'm pushing @ least 300 HP now, and as much if not more torque than a L98, and the trans is still quite happy.

after only $150 in mods, I ran a 13.96@98.45 in my '98 GTP Daytona 500 Edition Pace Car. from the stock 14.6 (on average, mag tests) to a 13.9 (new PCM tuning should slide me down to a 13.7 or better)


as for the corsica......

well you can get to around 220 hp that's it. add laughing gas (don't go more than like a 60 shot) and mid 14's are possible. this is on a G.P. a corsica should be a couple hundred pounds lighter.

for the Gen II 3.1, you can slap in a block from a 3100 from 94+
swap in Gen III 3400 heads (port them first) , and top end from pre '99 minivan (port the hell out of that too). get RSM throttle body.
get billet dogbones. make your own custom EGR plate to still use the OBD-I digital EGR since the intake will have a OBD-II Linear EGR location.

if you're luckey you can shoehorn in some headers from a 99+ 3400 N-Body.

Also underdrive pulleys will help out.

you'll get around 220 horses but do no better than high 14's/low 15's w/out juice

Also the Gen III motors are alot different than the gen II, but can be worked.

and screw w-body.

check out www.clubgp.com

oh BTW, Hi, I used to be a active member over here till I sold my slow camaro. it's now in junkyard heaven, as the next owner wrecked it.

I had a '94 Grand Prix, for a while,
now I've stepped up to a '98 GTP.

I had a '89 Trans Am, then sold it right away.

I miss thirdgen's alot, and likely will get a TA in the future to restore, since they're that old now.

I miss RWD, but my GP is honestly the only desireable FWD car out there for me. And boost is addictive. I'm now finding that my two favorite car sounds are a chevy v8 w/ flowmaster exhaust, and the sound of a 97+ GTP pushing 10psi blower screaming all the way.

I repeat my original statement, a 3.4 dohc isn't worth it, not all that powerful, high maintainance, and poor accesory locations (alt. fails alot and is @ the bottom of the motor.) and there aren't any mods. the only cool thing is the motor screaming @ 6800.

 

did 4th gen f-body come with the 3.4L??


What other cars came with the same block as the w-body 3.4L??

P.S. i mean what will the heads off of a 3.4L DOHC fit??

 

the 4th gen's came w/ a Gen II RWD , iron head 3.4 pushrod motor.

the w-body 3.4 only shares the liter amount, and 60* layout. that's it.

nothing is swappable. can't be done.

FWIW, the 3.4 DOHC motor can be found in:
91-94 Lumina 2-Door
91-96 Grand Prix 2 and 4 door
91-96 Cutlass 2 Door
97 Lumina 4-Door (it's possible 95-96, never saw one tho)
95-97 Monte Carlo 2 Door

 

Dam!! there goes another dream shot down by reality.

 

Actually, all the stuff "can fit". It all depends on your final goal. A show car or a running everyday street driver. Include wallet, hammer & engineering degree
BUT FOR WHAT IT'S WORTH!
Consider upgrading to a LS1/LS6.
THAT IS THE ULTIMATE POWERPLANT UPGRADE & COOL FACTOR UNDER OUR HOODS!
When my 3.4 expires one day, in goes a LS1/LS6. The upgrade is "easy" & requires preassembly knowledge.
PS the "K" member is removed, altered slightly by notch in frame, then "K" subframe reattached to frame with LS1/LS6 engine on it. After that , it's hook back up the stuff. Yes a tranny swap is required, but, oh well. The LS1/LS6 engine is a dream!
The guy at Third Gen Research, Roy Fender did the swap. He has a package he's selling how to do it.
Included in his swap is the rear axle from 4th Gen. That's the part I am most interested in, currently.

 

so true karl, was wanting to go for the Ls1 swap a long time ago (after a friend of mine slapped on in his 91 camaro RS, dream car to drive, incredibly fast, and reliable...unfortunately the price of one turned me elsewhere) Think i'll be happy w/ those huge 4 cam heads under the hood of the bird anyway, and w/ the cam changes and headers and carbed intake, we'll be looking for close to 380-400 on the powerside.


aren't engine swaps fun, but it's also funny, cause the more u research ur swap, the more detailed and in depth they become....just when i think i've got everything worked out, boom, outta no-where comes issue number II.