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-   Hummer H3 (https://www.hummerforums.com/forum/hummer-h3-17/)
-   -   H3 engine swap to Vortec 4.2 (https://www.hummerforums.com/forum/hummer-h3-17/h3-engine-swap-vortec-4-2-a-31544/)

R-code17815 Sep 13, 2013 07:22 PM

Just get a 3.7 or an Alpha

no need to get exotic.

SolidJJ Sep 13, 2013 08:43 PM


Originally Posted by Doc Olds (Post 301829)
Simple, a 6 will NOT fit in the H3.

The AR-5 is rated to 260# of TQ, so that is not going to work either.

It is not about what pictures look like, it is about what it is.

The factory already swapped in the 5.3 LH8, it is called an Alpha, much easier to buy one of those.



I do not know what you are thinking regarding E3 plugs, but they work for crap in the Coil on Plug UHEI used in the GM Atlas line.... and spark plugs do not make power.

Very true one E3, killed one of my coils after a week of keeping in my engine.

evil-90 Sep 18, 2013 05:58 AM

So guys you all said that the 4.2 Vortec won't fit the AR-5 manual trans..

OK it's not an issue..

evil-90 Sep 18, 2013 06:01 AM

If I bought V8 Alpha with 5.3 & 4L60E.. If I planned to convert to manual trans, what manual transmissions can you suggest ?? Please name 2 or three trans can fit the 5.3 V8....

skeeter Sep 18, 2013 07:45 AM

Why spend all that time and money on something that ain't broke?? Second, I have no idea why you would want to wheel with a standard other than preference.

jtphoto Sep 22, 2013 03:05 AM

Just came across this. No idea what their rep is but sounds like what you're looking for. Mash Motors Inc. | Wichita Diesel Conversions | The World Leader in Duramax Diesel Conversionso

happythree Sep 22, 2013 03:40 AM

and its only $32000 unless you get the cheaper on at $18000,but it improves mileage.

jtphoto Sep 22, 2013 12:09 PM


Originally Posted by happythree (Post 302222)
and its only $32000 unless you get the cheaper on at $18000,but it improves mileage.

The Mash Motors conversion is 18-32K!? Wow! I never saw their prices - that's a whole vehicle. lol

Nmocean Sep 22, 2013 01:33 PM

Has anybody done this yet? I am planning on going boating again and I really hate to go out and buy another vehicle, I love my H3. My daughter wants it and I have thought about trying to find a Alpha, but I have always had something different and that would be perfect and I could pull a 27 powerquest with no problem.

evil-90 Sep 29, 2013 06:37 AM

OK, what about NV4500 manual transmission taken from Silverado or Sierra 2500HD 6.0, 5.7 or 7.4 (models: 2000-2006) or (1988-1999)???

with all wheel drive FULL TIME !!! hahahaha


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