chevy 250 xj - JeepForum.com
 
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post #1 of 9 Old 09-20-2017, 05:27 PM Thread Starter
jnicholson44
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Xj chevy 250 xj

Hey everyone have a couple of questions.
1. Police interceptor xj- Whats so special about it?
2. Stock xj Transmission- What is the stock xj transmission for the police interceptor xjs?
3. Chevy 250- What is needed to swap a 4.0 inline 6 to a chevy 250 inline 6?
Reason im asking about the chevy 250 is my 4.0 thru a rod and ive got a freshly rebuilt 250 inline 6 im not looking to spend alot and im wondering what ill need to mate it to the transmission of the xj would i need to move motor mounts? Im just looking for a rundown on it any help would be greatly appreciated.

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post #2 of 9 Old 09-20-2017, 05:31 PM
CJ7-Tim
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1) Nothing really special, except a few heavy duty options that were also available on non-police Cherokees.
2) All 4.0 L automatic transmission XJ Cherokees have the AW-4 transmission.
3) Just because you have something doesn't make it a wise, cost effective, or worthwhile swap. The expenses involved for transmission adapters and other custom work, and the difficulty of adapting Chevy electronics to Jeep electronics will very likely exceed the cost of a good used or rebuilt Cherokee 4.0L engine.

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post #3 of 9 Old 09-20-2017, 09:44 PM Thread Starter
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Alright could you possibly point me in the direction of a 4.0 lol
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post #4 of 9 Old 09-21-2017, 04:50 AM
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Any 1990-2001 XJ Cherokee or 1993-98 ZJ Grand Cherokee 4.0 L engine block will interchange.

Remove and re-use ( or replace with new ) as needed or required from your original engine: Intake/Exhaust manifolds, oil filter adapter, throttle body, flex plate/flywheel, cylinder head, water pump, distributor-less ignition or distributor assembly, OBD engine computer sensors, fan belt driven accessories, and/or mounting brackets.

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A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

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post #5 of 9 Old 09-21-2017, 08:40 AM
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by 250 inline, do you mean one of the old ones, or the atlas 4.2 they stuck in trailblazers and such? That's a great engine but it'd be a ***** and a half to fit into an XJ and pretty much EVERYTHING would have to be custom, right down to the oil pan. There's some support out there for mercedes diesels, SBC's and such but I've never even heard of an atlas swap.

You could probably buy a 4.0 and stroke it for less unless you're a hell of a fabber.

If you're determined to use it (and I would love to see that build), it would probably be easier to take some measurements and see if you can use the GM tranny and T-case with it, instead. I'm functioning on years old knowledge here but I'm pretty sure the outputs are drastically different.

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post #6 of 9 Old 09-22-2017, 09:45 AM
mosey2001
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Ok. This has my wondering has anyone ever done this type of swap because scratch the 250 and think 292 or ford 300.

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post #7 of 9 Old 09-22-2017, 11:18 AM
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Any swap that fits under the hood is "possible". The question to answer is: Will the cost of the swap and the time invested in custom adapters have value/usefulness/cost effectiveness that exceeds a simple Jeep 4.0L replacement or a Jeep stroker motor ?

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A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
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post #8 of 9 Old 09-22-2017, 12:26 PM
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Quote:
Originally Posted by mosey2001 View Post
Ok. This has my wondering has anyone ever done this type of swap because scratch the 250 and think 292 or ford 300.

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In theory it would work, BUT keeping a 4.0 cool is enough of a hassle. I would love to see a 5.0 in one though.....
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post #9 of 9 Old 09-22-2017, 05:08 PM
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Quote:
Originally Posted by Nick05 View Post

In theory it would work, BUT keeping a 4.0 cool is enough of a hassle. I would love to see a 5.0 in one though.....
Yeah, it's ki d of hard to justify any original swaps when a fee like SBC, strokers, mercedes diesel have the aftermarket support already there and documentation on how the problems have been tackled.

Have to admit, though I'd really love to see someone manage one of the more efficient modern diesels. The new I4 duramax, CRD V6, something alomg those lines.

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