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  #1  
Old 03-11-2018, 07:33 PM
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ENGINE SWAP BACKWARDS: V8 - I6

Found a great deal on a V8 X5/2001 with 146K miles - but it's a V8 . The owner claims a knocking noise and that it needs an engine. I am wondering if I can swap in a I6 /330 engine instead. I imagine I have to do some small mods like exhaust manifolds and engine mounts. But what about the transmission? Any particulars with the EMC or other computer systems? Thanks in advance.
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Old 03-11-2018, 07:57 PM
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You are about to open a can of worms. Once you start you will reach a point of exasperation and ask yourself "Why did I ever start this?" Find yourself a good V8 engine and use it or buy another vehicle.
I once swapped a BMW "baby" six for a full size six. Never again.
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Old 03-11-2018, 08:43 PM
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Old 03-12-2018, 12:40 AM
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Old 03-12-2018, 01:28 AM
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Old 03-12-2018, 01:33 AM
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Don't bother with that, it's a waste of time. It's super cheap to just find another V8 and put that in. Plus why would you want an i6 in a V8 X5? A 4.4 already feels kinda sluggish (IMO).
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Old 03-12-2018, 07:46 AM
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For the effort you'd be far ahead to just get a known good V8, do a refresh on it including the chains, guides, and rebuild the VANOS assemblies, replace all the gaskets and seals, and then drop that in.

Last edited by tempest411; 03-12-2018 at 10:53 AM.
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Old 03-12-2018, 08:39 AM
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To answer your original question about the trans, you will need to swap the GM trans in since the V8 came with ZF trans, and the bellhousing will not mate up. Once you swap the trans, you will need to swap the rear differential since the rear differential gearing is completely different in a V8 and I6. You will also need to get a front differential to match the rear differential gearing.

The X has dropped in price that you can buy a fully running high mileage X for under 3 grand these days.
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Old 03-12-2018, 11:00 AM
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The X has dropped in price that you can buy a fully running high mileage X for under 3 grand these days.[/QUOTE]

It's pretty amazing how much complex mechanical and electrical gobbledygook you can get for under 3K these days.
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Old 03-12-2018, 11:01 AM
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Quote:
Originally Posted by tempest411 View Post
The X has dropped in price that you can buy a fully running high mileage X for under 3 grand these days.
It's pretty amazing how much complex mechanical and electrical gobbledygook you can get for under 3K.[/QUOTE]
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