As the thread says:

Is every 3.4L DOHC?

And if so.. Does this make it harder to work on?

 

No.

Kinda.

 

Thanks

 

3.4 DOHC motors only come factory in FWD applications; the 3.4 that makes the easiest/best swap into a third gen is the cam in block, OHV V6 found in 1993-early 1995 Camaros and Firebirds.

Not that a 3.4 DOHC couldn't be made to work, its just that it would require much more work (fabrication, tuning, etc) to put it in. Raven might be able to help, since he has more experience with the "other" 60 degree V6s. You might also check out some of the Fiero boards, as the 3.4 DOHC is a popular swap in those cars. Honestly though, I have never seen one swapped into a thirdgen, so you'd be on your own as far as making everything work.

 

Yeah, Fiero owners kill for that engine. It's a great motor to have because it produces 200hp in stock form, but I think it lacks a little bit in torque. It has very decent performance numbers too though.

However, unless you're looking for something unique. You can get the same amount of power with a built 3.4 V6/60.

I actually just blew like a total of 2 grand on a 3.1 rebuild with a whole host of crap (cam, port / polish, roller rockers, etc etc). I figure (in my Fiero) I'm running probably a flat 14, consistent low low low 15s.

I don't even have 1,000 miles on this motor yet and I'm already thinking about the next rebuild. Over the weekend I bought a 3.4 V6/60 from an early 4th gen Camaro (like someone else mentioned on here before, it's a direct swap).

You can do everything to the 3.4 that you would normally do to your 2.8. A hotter cam, roller rockers, port / polish of the intake, etc etc... (the only difference between the 2.8 block and the 3.4 other than displacement is that the 3.4 is a DIS system so you have to pop out the cap that's where the distributor would normally go).

However.. how does this relate to the DOHC 3.4? Well, the bottom ends are nearly identical. And the 3.4 DOHC pistons fit WITHOUT MODIFICATION in the standard 3.4 V6/60 block. They are light-weight, and bump up the compression of the motor considerably.. (in the range of mid to high 9s from what I understand). This is partly why the 3.4 DOHC makes more power too.

So when I rebuild my 3.4 V6/60 I'll probably have a Crane 2030 cam in it, 3.4 DOHC pistons, the roller rockers, and a real performance cyl head rebuild and porting job. There is a place that installs 1.8" intake valves to replace the 1.72" intake valves.

I'd like to think that when all of this is done, I'll have around ~200 horsepower in the Fiero. Of course a built up 3.4 V6/60 will have a significant amount more torque than a 3.4 DOHC.

With that 3.4, I'll probably get pretty decent gas mileage.. better than my 2.8 did stock, because it will be a more efficiently running motor. PLUS.. the factory computer and everything will hook right back up to it. The ONLY thing I have to change are the fuel injectors (change to 17lb instead of the 13 or 15 that come stock).

 

There was one 3rd gen that had a 3.4 DOHC swapped in, I never heard if the owner got it running or not, it fit with minor modifications to the chassis, the hard parts were exhaust, mounts, oil pan and a few other misc. things.

Since GMF is no longer I can't get a link for you, or any pictures, it however look like it belonged in the F-body.

The blocks are very different from a DOHC to an OHV, the DOHC does not have any provisions for lifters, it still uses a "cam shaft" type device, with no lobes, some times refered to as a "jack shaft" that runs the oil pump drive. The block also has large opening at the rear of the 1-3-5 cylinder head and the front of the 2-4-6 cylinder head for oil drain back, so oil drain back on the even number cylinder bank would probably be an issue, since under accel, the oil likes to sit at the back of the head (firewall end) when installed longitudily. A scavenge pump or additional tubes could be made to work for oil drain back on that bank, might even be a good idea for both.

Other than the crank and rods, everything else is different between a DOHC and an OHV, the pistons will fit in an OHV, but are not really designed for that purpose.

 

Yes, but do keep in mind that if you are building up a NICE cast iron V6/60 block, your only alternative to stock compression pistons is to go with the lightweight hyperutectic DOHC 3.4 Pistons. They bump the compression up by 3/4ths of a point from the stock compression.

These are standard rebuild parts in the Fiero community for people who swap the 3.4 OHV into their cars.

 

As said, No.

 

my sister has a 93 lumina Euro it has the 3.4L DOHC dam that thing could smoke any V6 camaro and my friends 305

 

FOr the effort, the 1993-95 ('95 first half year) 3.4 OHV V6 is the HOT TICKET in a 3rd Gen F Body.
The 3.4 DOHC, I was offered one before I settled on my 1995 3.4 long block.
I looked at diagrams of it and just passed on it.
I don't want to re-engineer a ride, I have more cars with more power.
The 3.4 DOHC is COMING BACK on the road in a 3.5/3.6 form in the 2005 Caddy's.
BUT the 3.4 DOHC sure would be very nice eye candy under the hood!
Pass on this DOHC project unless you have deep pockets & lots of engineering skills & fabricating skills.
Speaking of eye candy, on the road today I saw a real nice 1965 Chevelle with a BIG BLOWER THRU THE HOOD, being pushed around the corner due to it dying on the owner. I felt bummed for him, but NICE BLOWER THRU THE HOOD!

 

PS
IF I had the inclination & the desire for effort,
I'd spend time swapping the LS1/LS6 into a 3rd gen chassis, backed by a 4th Gen rear axle & using a T56 Tranny!
NOW THAT'S A NICE COMBO!
Use SBC to help the car not twist like a pretzel!