1984 CJ7 2.5 AMC - Carb & intake question - JeepForum.com
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post #1 of 9 Old 07-25-2011, 08:59 PM Thread Starter
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1984 CJ7 
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Location: Lohn
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1984 CJ7 2.5 AMC - Carb & intake question

Looking for carb/intake ideas.

I've got internal engine problems that need addressing. So.... we're about to dive in and repair/rebuild instead of gut and replace.

My mechanic wants to rebuild the engine and is talking of getting away from the single barrel carb and switching to a 2 barrel carb and cutting lose all the extra "safe air" vac stuff.

Sounds good to me but I was hoping someone would have some sort of input from experience.

So far I feel good about all his other ideas.

Last edited by cpop; 07-26-2011 at 09:03 PM.
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post #2 of 9 Old 07-25-2011, 10:56 PM
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1984 CJ7 
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Location: Hazel, KY
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been there, done that

I have a 1984 cj, 4 cylinder, 4 speed, basic little jeep, red.

i had the motor replaced, new long block at 135K, then replace carb with a Weber carb.
runs pretty good, no speed demon, but it only has about 60-80 hp (i think)
main issue, starts good, runs good, uses no oil

It was kinda of a pain getting the weber set up and running, but was because i am not that much of a mech. parts all fit fine.
got the carb from quadratrack or some such jeep place.
email me and i can send you some pictures of the setup and tell you more about it.
unit has worked well for me.
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post #3 of 9 Old 07-26-2011, 12:17 AM
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1981 CJ7 
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Is this the same 150ci engine that was used in the Wrangler or is it the Iron Duke Pontiac engine 151ci?
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post #4 of 9 Old 07-26-2011, 05:52 AM
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1984 CJ7 
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I believe the 1984 model got AMC's version of the 4 cylinder, not the GM iron duke engine.
I think AMC stopped using the GM motor in the 1983 model year.

Iron duke was a much better motor, so i have been told, but I have the 1984 version so that is what i work with.

That was the first thing i was ask by a old mech when i told him i had bought a jeep with a 4 cylinder, he ask what year was it, i said 1984, he said well you got screwed, (he was never one to hold his true feelings back).

He said the 1984+ motors by AMC were crap++++.
but its worked all these years
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post #5 of 9 Old 07-26-2011, 05:55 AM
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1986 CJ7 
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You probably have your reasons for staying with the 4 cyl but, wouldn't it almost be cheaper to find a used 258 around and drop that it?

there is 2 on craigslist right now in Dallas $400-$500
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post #6 of 9 Old 07-26-2011, 04:49 PM
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I would argue with that mechanic. The AMC 150 is a very stout little engine. Mine had well over 220k on the odometer, never burnt oil, great compression. If I had not totaled the Jeep I am sure it would still be running just fine. They are not speed deamons...but with a proper axle ratio are tolerable.
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post #7 of 9 Old 07-26-2011, 09:02 PM Thread Starter
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1984 CJ7 
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Hello Folk..

This is my first post and I really appreciate the current feedback for sure. I'll take it all in and let you know how it goes.

I'm not looking to break any travel records, in fact I'm looking primarily for a ranch vehicle that will travel if I want it to.

@MrWonderful73-- Would I not have to upgrade the drivetrain as well with the 258 6cyl?

More input is certainly welcomed.
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post #8 of 9 Old 07-27-2011, 07:11 AM
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I certainly would not put the money needed to rebuild an engine into your 4 cylinder, sorry but I can't hold my feelings back!

Now let me state that I own a 82 CJ8 with a 149k miles Iron Duke and it will kick the butt of my 86 CJ7 with only 50k miles. The 86 has a T5 OD tranny, like get serious. It is not that I'm opposed to the 4 bangers, I just wouldn't put 2-3 grand into one and that is what you are about to do. I rebuilt my 258, It was $1200 machine work, $425 new head, $150 new intake, $400 new carb, $150 new header and NO labor to assemble or install. I guarrenty you will be north of $2000 before it runs again. Find a complete running used 258 or go big and get a 4.0 and never look back. You'll be gald you did.

1985 CJ7 - total customization underway, Sublime green and Plum crazy purple, Ford 9", 258 w/ Holley 475
1985,93 CJ7,YJ - L98 TPI Vette motor, Atlas twin stick, Dana 60s front and rear, Arbs, 39.5 Swampers
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post #9 of 9 Old 07-27-2011, 09:22 PM Thread Starter
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@bkeese - thanks for sure....
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2.5 , cj7 , intake , overhaul

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