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V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

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Old 04-09-2008, 05:50 PM   #1
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4th Gen 3.4 and LQ1 3.4 DOHC differences???

I'm in love with the LQ1 Twin Dual cam...
I found a picture a while back, don't remember where, that completely inspired me to do this.
Here's the picture...



Is there a rwd trans that bolts up to this?
I can tackle the accessories/exhaust/wiring myself...
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Old 04-09-2008, 06:44 PM   #2
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

The LQ1 is the most unreliable POS motor I've ever had the misfortune of working with.
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Old 04-09-2008, 07:54 PM   #3
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

Ouch. How so?
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Old 04-09-2008, 08:41 PM   #4
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

You're lucky to keep a head or intake gasket on that motor for 20,000 miles.
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Old 04-10-2008, 02:55 PM   #5
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

From what I've heard the swap is quite difficult to pull off as well.
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Old 03-18-2011, 02:01 PM   #6
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

A t5 v6 bellhousing from a fourth gen 3800 fits, it has the right starter location on the drivers side of the motor. How did you do your engine mounts?
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Old 03-18-2011, 11:17 PM   #7
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

A 700R4 would also bolt up to it fine. the stock flexplate wouldn't work though, 95ish 2.2 S10 would have the correct spacing and be the right size to use the FWD starter.


At least in a RWD config it would be easier to change the alternator on... lol



It's actually an excellent engine, however it's severely lacking in aftermarket. The heads flow an insane amount of air so the possibility is there to make insane power.

check out the DOHC section on 60v6.com: http://60degreev6.com/forum/forum.php

also more info here: http://60degreev6.com/forum/content....1991-1997-DOHC
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Old 03-19-2011, 10:28 PM   #8
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

Is there a cutoff for necroposting? 3 years maybe?
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3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, early '769' heads with 3500 valves, LS6 springs & mild porting, worked over heddman headers, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle. 210hp at 5800ft (that's 270hp at sealevel )
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Old 03-21-2011, 12:02 AM   #9
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

Meh, at least there was some valid info posted up..
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Old 03-22-2011, 08:35 AM   #10
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

Has anyone successfully swaped one of these motors in a fbody? I would like to know what major problems came up. A friend and i want to try this swap in my car. We alredy have a rebuildable 3.4 dohc out of a monte carlo, a t5 bell housing from a 3800 fbody and a obd1 computer from a z34 lumina.
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Old 03-22-2011, 06:23 PM   #11
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

Someone had one in a 4th gen awhile ago but I don't believe it ever actually ran.
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3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, early '769' heads with 3500 valves, LS6 springs & mild porting, worked over heddman headers, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle. 210hp at 5800ft (that's 270hp at sealevel )
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Old 03-23-2011, 08:17 AM   #12
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Re: 4th Gen 3.4 and LQ1 3.4 DOHC differences???

So what your saying is that this swap is like finding bigfoot, every one talks about seeing one or building one. But there none of them runing around.
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Old 03-23-2011, 08:17 AM
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