Another 4.0 swap question
McSyd
Jeeper
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.
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.




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