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Old 09-25-2012, 09:23 PM   #1
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4.3l v6 tj conversion

I have a 97 sonoma with a 4.3 vortec and 5 speed transmission. I bought it for $500 and replaced the intake gasket has ran like a charm since. Im thinking of gutting it and dropping the engine in my tj that currently has the 4cyl. If anyone has done this were you happy with the outcome? were you able to use the jeep power control module? I know im going to have to by a transfer case adaptor for the gm 5 speed but other than that what else am i going to have to get for the conversion? If you have pictures of this conversion i would like to see them!

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Old 09-25-2012, 10:04 PM   #2
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Sound like a lot of work for 30 more HP(?)
Edit: It was the van that made 150 HP IIRC, I think you got 180. That might be worth it.

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Old 09-25-2012, 10:37 PM   #3
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yeah im looking at about 55-60+ hp and a significant gain of torque close to 100 ft lbs. The 4.3 actually puts out more than jeeps inline 6 while still having better fuel economy. But like you said i still dont know if it would be worth going threw a conversion without it being a v8 but i will be much better off with the 4.3 than i would be with the 4cylinder especially when i get tie on some bigger tires and lift.
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Old 09-26-2012, 09:52 AM   #4
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The 4.3 will give you some room to work on it and won't be so jammed in there.
My 2-door S-10 Blazer (don't have it anymore) had that engine and was rated at 190 HP and something like 235 lb-ft of torque by then (my model year) and had a pretty good, useful torque curve with the 4-speed automatic. The Blazer, even the 2-door, wasn't a particularly light vehicle and the Vortec pulled it along very nicely, and still does with the full-sized Silverado base model "work trucks."
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5 speed manual, 4" lift, 33.5" tires
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Old 09-26-2012, 11:22 AM   #5
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Yeah I wish I could find someone that has done this conversion so I can have a heads up on what problems to expect
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Old 09-26-2012, 04:41 PM   #6
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Quote:
Originally Posted by wesleymburge View Post
Yeah I wish I could find someone that has done this conversion so I can have a heads up on what problems to expect

Find someone that's done a Chevy V8 swap (Gen 1 or 2, not the current engines). The 4.3L has the same dimensions except for length. The 700R4 or 4L60E would be good transmissons for the swap, the 700R4 would simplify things quite a bit. Get a Chevy t/c for it and you should be in pretty good shape.

www.novak-adapt.com has some info, but you should take it with a grain of salt.

http://www.novak-adapt.com/catalog/e...s/mmtj-cv6.htm
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Old 09-25-2013, 11:26 AM   #7
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I am putting a 4.3 in my 97 TJ right now. Nice fit.
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Old 01-25-2014, 11:11 AM   #8
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Originally Posted by wesleymburge View Post
Yeah I wish I could find someone that has done this conversion so I can have a heads up on what problems to expect
I have mine in and running now. Very happy with the upgrade

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