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Another 4.0 swap question

Another 4.0 swap question

McSyd

Jeeper
Posts
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Location
PA
Vehicle(s)
‘85 CJ7. Mainly stock. Getting a full restoration.
Ok so I’ve got a 4.0 from a 92 XJ. Freshly rebuilt. Got it on the chassis today. It’ll be carbed with an MC 2150 carb on the AMC 258 i6 / 4.2l intake. HEI distributor. Want to keep it simple.

My issue is I cannot for the life of me figure out the belt routing and accessories brackets. I installed a YJ water pump. But things aren’t making sense. All of the brackets are from the XJ. So how the heck does this need to be? I’ve attached a few photos. I did not install the power steering pump yet (need to clean that up tomorrow) and I have the XJ ac compressor I can use as an idler pulley if I ha e to.

You’ll see in the photo I circled where the front alternator bracket doesn’t want to line up correctly. I have a 1/2” gap. Might just be that the bracket was bent. But I’m not sure. I’m not certain where there needs to be a stud bs a bolt.

Where do I mount the mechanical fan? To the water pump or to the idler pulley off to the side? Do I use the XJ fan, a cj fan or do I need a YJ fan?

So if you’ve done this swap, I’m all ears. If you have any photos of your engine that’d be a huge help.

A5A7E464-916E-4429-B8C5-881686C92101.webp

9616E7EA-34AF-4E0E-AC5E-2C6B66A31F17.webp

F09DA5C3-ED5D-455F-8391-5D6FE5441984.webp

6B27FAA1-E415-4AD4-B4BA-0522BDD8A2EB.webp
 
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Not sure why the photos are sideways. Tried to fix it

6C68D43A-11DB-430E-8582-663D2A22C7FB.webp

AA67F7ED-5EEB-4155-9284-1077BD7CFC3E.webp

3CD021B8-2385-458D-BC9D-A0622CEB9CB0.webp
 
Your problem is the XJ ran two fans side by side so the water pump is off center because a electric fan ran next to the one on the pump. You need the pully system for a YJ because it moves the pump to the center with one fan like a CJ.
 
Your problem is the XJ ran two fans side by side so the water pump is off center because a electric fan ran next to the one on the pump. You need the pully system for a YJ because it moves the pump to the center with one fan like a CJ.

Ok. I didn’t realize the xj had 2 fans. Do you ha e a photo of the YJ setup? Looks like I may need to run to the you-pull-it yard Saturday. Want to know what all I’m looking for.

Thanks
 
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