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Unread 09-09-2013, 06:46 PM   #1
gainesee
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1986 CJ7 
 
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What kind of motor??

I am new to the rebuild scene and would love some input in regards to motor replacement. I have an 86 CJ7 with Chevy 10 bolt wide tracks (3:73). Not going to be doing anything major as far as crawling, but I want it to be off road capable and a "daily driver" at the same time.

Thanks in advance for any and all advice.

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Unread 09-09-2013, 07:18 PM   #2
Stormpaw
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There are a lot of good options. For a daily driver my choice would probably be for a Chevy Vortec V6.

I highly recommend Novak's Knowledgebase.
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Unread 09-09-2013, 07:19 PM   #3
GMACK83CJ7
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If your mechanically inclined and have some time I would try the 4bt swap but your also talking abit of $ too
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Unread 09-09-2013, 11:08 PM   #4
CSP
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Seems like the factory engine suits the bill. Does it not run or need a rebuild or what?
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Unread 09-09-2013, 11:17 PM   #5
gainesee
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I have an "Iron Duke" and the lack of power is killing me.

Thank you for the Novak link.
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Unread 09-09-2013, 11:26 PM   #6
holliewood61
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Can't go wrong with a 258 or an amc 304. While the cummins 4bt has the cool factor dang are they noisy.
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Unread 09-09-2013, 11:47 PM   #7
Matt1981CJ7
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A golf cart has a "motor". You are looking for an engine. Sorry, it's a pet peeve of mine.

This thread has some good info for you.

Matt
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Unread 09-10-2013, 12:55 AM   #8
Stormpaw
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I am glad it was helpful.

One other thing to consider, unless you have a T176 you are probably going to want to swap the transmission as well. The 80's were not good years for CJ transmissions....
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Unread 09-10-2013, 09:59 AM   #9
dirtdudeaz
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Quote:
Originally Posted by Matt1981CJ7 View Post
A golf cart has a "motor". You are looking for an engine. Sorry, it's a pet peeve of mine.

This thread has some good info for you.

Matt
http://www.merriam-webster.com/dictionary/motor

I think motor may be still acceptable


http://www.jeepforum.com/forum/f8/ir...b-swap-676923/

http://www.jeep-cj.com/forums/f2/iro...50-swap-12152/

http://www.jeepfan.com/blog/crazy-je...e-conversions/

My vote would be diesel! Those things are too cool and definately turn heads
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Unread 09-10-2013, 06:15 PM   #10
strvger01
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x2 on the 258 6 cylinder. should bolt right in and give you considerably more power.
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Unread 09-10-2013, 06:57 PM   #11
ingenio
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...." but I want it to be off road capable and a "daily driver" at the same time"...

based in your post I would say a 258 will fulfill your goals, just upgrade with a Motorcraft 2100 carb & a team rush ignition. Bolt in affairs, no fabrication nor custom adapters involved.

Tranny wise I would suggest the native T176 and its bellhousing....not sure if the I4 bh is compatible with the T176....
again, native stuff =low cost.

all other "cool" options (4BT, OM616, Chevy's SB & Gen3s) are $$$.

my 0.02
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Unread 09-10-2013, 10:06 PM   #12
Always2L8
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Quote:
Originally Posted by gainesee View Post
I am new to the rebuild scene and would love some input in regards to motor replacement. I have an 86 CJ7 with Chevy 10 bolt wide tracks (3:73). Not going to be doing anything major as far as crawling, but I want it to be off road capable and a "daily driver" at the same time.... (post #1)

And .......

I have an "Iron Duke" and the lack of power is killing me.... (post #5)
Did I missing something? A stock 86 CJ should have an AMC 150 4 cylinder and not the Pontiac "Iron Duke". The Iron Duke will have the carb on the passenger side, AMC 150 on the driver side.

I would verify what engine and transmission you have. IIRC the GM 4 cyl engine (Iron Duke) uses a different bell housing bolt pattern than the AMC 4 cyl. Iron Duke = standard GM SBC. AMC 4 cyl = GM 60 degree (i.e. 2.8L V6) pattern.

Don't rely on my memory. Call Novak with your specifics. Top notch company.

Good Luck
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Unread 09-10-2013, 10:58 PM   #13
gainesee
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Ty always - u r correct. I confirmed today after prolonged googling that I have an AMC 150. Having serious issues getting it to pass smog. Need some suggestions on how to boost HP for this lil guy. Heard that Redline makes some good carbs, but need other suggestions on how to squeeze out some power.

Thanks again for all the help boys!!!
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Unread 09-10-2013, 11:13 PM   #14
mattl
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You could spend money on a cam, intake, etc, but will still not get the power of swapping in the 258 or 304, 360. Maybe someone could chime in about a turbo or supercharger on the 150ci? It would probably still be cheaper to swap a V8 anyway.
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Unread 09-11-2013, 12:58 AM   #15
BagusJeep
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It is an engine, it burns fuel internally to provide power.

The 258 is an OK swap but it will turn it from slow into not quite as slow, it will not be a roadburner.

Could I suggest the mid 90s 4.0 HO from a Cherokee or Wrangler? You will need to do some plumbing and wiring to make the fuel injection and ignition work and swap out the exhaust manifold, radiator and a few other bits but it will give plenty of performance. As it is a development of the 258 it is a relatively easy fit.

The T176 is a good medium strength 4 speed from the early Eighties that will fit the 4.0HO and is a CJ original fitment. Plenty of other boxes out there as well but it will be well suited to the 4.0HO.

If you want to pep up that AMC 4 banger you may struggle. It was a bit undersize for a CJ but gave good fuel economy.
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