Hey guys, I found a 3.4 out a 1995 Camaro with 800 mi for $725 for my wife's 1984 Camaro. Anyways, what would I have to swap and what would work? Would its stall converter work, how about my stock ex. manifold, all its timing stuff and would I have to swap out my carb or should that be sufficient for my needs. Im used to swapping with exact engines not older to newer, smaller to bigger. So please help if you can, and dumb it down if you can, I dont know all the acronyms or technical speak. Thanks.

 

The 2.8 and 3.4 blocks are exactly the same. All you need to swap over is the intake/injectors, accessories, timing cover?, distributor?, exhaust manifold. It is a direct replacement. The only real difference is that your wife will now have ~25 more horses.

 

Im gonna try and get all the tin, flywheel, stall convertor, timing cover and others. Is that all the difference between the 2.8 to 3.4, I figured it would be a little more due to the 3.1 being a replacement as well. Oh well, if I have anymore questions, I know where to go. Thanks.
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Also, would I be able to use the exhaust and intake gaskets for the 2.8 that I have, they are brand new?

 

go to the tech articles, there is a whole write up by KED85 on this swap. then do a search, there are countless threads on it. you should find the answer to every question you need by doing those two things. if by chance you dont, then post again. oh, and keep it to this thread please

 

The only real issue, and it is minor, is the fuel pump. You need to buy an aftermarket fuel pump from NAPA or advance auto. You want the universal carb fuel pump with low pressure output (less than 12) to get the job done. Easy and about 30 bucks.

Your 3.4 doesn't have a place to mount a mechanical fuel pump. Keep your 3.4 timing cover and oil pan because they are different. Re-use your intake and carb, distributor, sensors, and front accessory drive.

Then, enjoy!

 

800 miles? Are you sure about that? it seems kinda hard to believe. Did you mean 8,000 or 80,000? Anyway, just strip the 3.4 to the block and heads, then swap over the old parts from the 2.8 to the 3.4

I'm not to sure, but I think you might need a new carb to fuel the 3.4 adequately? I know you need 3.4 injectors on the fuel injected models, and I hear you need to get a larger carb for the fuel needs or something like that.

 

Kris is dead on. Except you might need to try and use the 2.8 timing cover for your timing marks that the 3.4 cover doesnt have. Its possible an s10 2.8 might have the perfect cover you need.

You will need a flywheel or flexplate for a 3.1 or 3.4.

You can run it off the carb you have, but will later need to bump up in cfm size for best performance.


I have posted a detailed tech write up on this in the forums here, but it is based on a fuel injected model, not carb.

 

https://www.thirdgen.org/forums/v6/3...-3-4-swap.html


I wish that thread was a sticky.

 

me too. I went crazy at times looking for it when I was doing the swap lol I was thinking of writing one myself just for the heck of it too.

 

from what i read it says actual but could be a typo. I took all the tin off before I got rid of the block. So I still have the timing cover. Ok, so Ill have to get a electrical fuel pump and also im not really good at timing with the distributor. So I may be asking questions soon, wont be for a few weeks due to military.

 

Ok, so what I gather, is that I can use the 3.4's oil pan, timing cover, flywheel, stall convertor the 2.8's intake, carb, distributor, exh. manifolds and will the carb be good for everyday driving, cause it dont need performance. And Ill have to buy a fuel pump, is my assumptions correct. Also, Ill be pulling from the car, cause the only thing im not gonna take is the tranny, exh. manifolds, intake and some of the accessories. Thanks for all the info.

 

Some people had problems using the 3.4 pan, some didnt. As for timing cover, the 3.4 cover does NOT have the timing gauge on it. If you want to use the 3.4 pan, your gonna need a late model 2.8/3.1 timing cover. Even then, I heard one time that the old carb water pumps worked backwards.

Correct on elec pump, intake, exhaust manifolds, fly, stall, dizzy. Carb will work for now with some adjustment. But later you will need a larger approx 400cfm carb. Your going from a 172ci motor, to 207ci. Basically same as swapping a 305 for a 350. The 305 carb will run a 350, but it works better and more efficient with the 350 carb.

 

alight for ease of time and frustration ill swap the pan and timing cover and match up the pumps

 

Your choice, just trying to for-warn you that there might be some issues in that area and youll have to look at that and figure it out. I dont think anyone on here has done a 3.4 carb swap. Will be nice to have someone that now knows.

 

I have a complete upper gasket set for the 2.8, will the intake and exhaust gaskets fit with the 3.4 or should I get the 3.4 gaskets. Thanks.

 

bump

 

yup, it'll work. All you are doing is using the 3.4 block/heads basically. The accessories come from the 2.8 so to put on the 2.8 accessories, you'll need the 2.8 gasket sets.

 

You were only two posts down when you bumped this LOL!!!

 

 

btw, just curious but,so this motor actually has only 800 miles????

 

As for now, thats what it says, once i get home ill check it out, but as long as its still low mileage 80,000 and in good shape ill still get it

 

thats good. I once could have scored a 3.4 with everything for $500. Turned out to have 180,000 miles on it though! Luckily I stumbled across one with only 46,000 miles for a very nice $350!!!

 

Ok, so now that I will be going with a 3.4, I was wondering what plugwires should I go with, the car's orginal or go with the engine's year. Also, how do I do the dizzy, I will be swapping out the 3.4 timing cover for the 2.8's for the timing mark, so I will make sure that the timing set is good but how do I adjust the dizzy? Its been along time but if I remember correctly is to go to TDC 0* on the #1 cylinder and place the dizzy firing on the #1 cylinder and then I adjusted the dizzy while running to feel and ear(ran great after). Also I do not know how to use a timing light or have one. Also what is the firing order and does the cylinders line up like this:

Trans
5 6
3 4
1 2
fan

So if you can, basically explain it to me as if you were teaching it to someone for the first time, I do have great mechanical ability but I have to learn about cars by myself so there is alot I don't know. Just so you know, i did search but I only found threads that talk like you already know roughly how to do it somewhat. Please up, thank you.
Fan

 

The firing order is correct. To get the timing correct get the #1 piston at TDC. Then take the cap off of the dizzy once the dizzy is in the motor make sure that the rotor is pointing more of less towards the #5 cyl. That is where mine points when #1 is TDC.

 

So what it the correct firing order, but at TDC with the timing set aligned at 0* wont that put the #1 Cylinder at the end of the compression and beginning of the firing stroke so wont the dizzy have to point to the #1 wire so it can fire the cylinder.

 

help anyone

 

well, i did that. I put the piston to TDC and aligned the rotor to plug 1. IDK it makes sense but it doesnt work. I had to adjust the wires back one to make it run. If it werent for the timing, my car would have started on the first turn of the key.

 

Its been over a year since I stabbed a dizzy, so Ive partly forgot.

I just remember it being a pain in my *** and took several trys even with some experience.

My best suggestion is to put your old motor on 1TDC. Put alignment marks on the dizzy hold down to dizzy base that WONT rub off(clean well first, use paint). Then pull the cap and mark where your rotor button is on its base. Then when you put that in the 3.4, do your best to duplicate it/make every thing match up using your old 2.8 hold down. That should get you with-in a few degrees... enough to make it fire.