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Need help with engine

Old 04-21-2013, 06:00 PM
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Default Need help with engine

I have a 85 xj and I think it's going to die soon .

What I need to know is what can I put in there that will just bolt in no extra [email protected] p to do
My jeep is a stick if that helps
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Old 04-21-2013, 07:18 PM
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Another engine just like the old one.
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Old 04-21-2013, 07:20 PM
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The v6 that came in that model is a pos . It really doesn't have any power
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Old 04-21-2013, 07:22 PM
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Correct. But you asked for a bolt-in.
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Old 04-21-2013, 07:22 PM
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No magic dust here.

Best bet would be to move up to an 87 or newer XJ with the 4.0 Unfortunately, it doesn't pay to put much money into an 85.

There were plenty of 87+ XJs built, you will be able to find a good one if you look hard enough.
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Old 04-21-2013, 08:44 PM
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You could always source a 2.8 from a Buick or Pontiac with fuel inj. and maybe even a supercharger. Way better than the utility model 2.8 you have in there now. GM messed those engines up when they put them into trucks and the like, 2.8s' did get better when fuel inj. came along alot less problems. You would have to get the wiring and computer along with the motor, how much time have you got?
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Old 04-22-2013, 08:37 AM
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It's hard to tell I work and live at the same place so I really don't drive it that far nor that long at a time
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Old 04-22-2013, 08:57 AM
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Originally Posted by highmileage View Post
You could always source a 2.8 from a Buick or Pontiac with fuel inj. and maybe even a supercharger. Way better than the utility model 2.8 you have in there now. GM messed those engines up when they put them into trucks and the like, 2.8s' did get better when fuel inj. came along alot less problems. You would have to get the wiring and computer along with the motor, how much time have you got?
Oh. Now that'd be kinda sweet. I've seen one at the junkyard before.

If you did a 4.0 isn't there some differences in the firewall you'd have to deal with?
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Old 04-23-2013, 06:14 PM
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Originally Posted by DieselD View Post
Oh. Now that'd be kinda sweet. I've seen one at the junkyard before.

If you did a 4.0 isn't there some differences in the firewall you'd have to deal with?

Yeah with a 4.0 you would have to do some metal moving.
Some of the Buicks' were turbocharged and the Fieros' had superchargers on some of the GTs'. The turbo 2.8 is what was in the Grand National in the 80s', I also believe there was a 3.2? also that could be a bolt in.
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Old 04-23-2013, 06:23 PM
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no grand national ever came with a turbo 2.8
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Old 04-23-2013, 06:27 PM
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Originally Posted by s346k View Post
no grand national ever came with a turbo 2.8

OK... then what was it? I'm not a Grand National guy, just aware they exist and were sick on power in the 80s'.
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Old 04-23-2013, 06:31 PM
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3.8
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Old 04-23-2013, 07:12 PM
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Originally Posted by Big David View Post
3.8

Right on.Thank you
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Old 04-23-2013, 07:53 PM
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I don't mean to burst your bubble, but most if not all of the V-6 Fieros' burned to the ground. A good running T 6 would twist your Jeep in half if you ever got the traction. Better to find a 2.8 and leave it be.

Last edited by Turbo X_J; 04-23-2013 at 07:55 PM.
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Old 04-23-2013, 08:15 PM
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I'm going to do a engine flush and a gasket over hall before I give up on the 2.8 and knowing me ill run that until it dies for good thin ill change it out
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