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Old September 24th, 2013, 09:17 AM   #1
Gunsworth
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Default 2.5 to 4.0 swap, clearance at firewall...

Basically look at the pic and tell me if this will be enough clearance between the engine and firewall.



Had the mounts moved by my welder and thinking they probably could have gone further forward... he based the measurements off his stock 4.0yj.
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Old September 24th, 2013, 09:44 AM   #2
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Looks fine
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Old September 24th, 2013, 10:03 AM   #3
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Thats what im thinking, I know some guys want the engine far forward for drivetrain clearance, but ill be running a mechanical fan, so being a little further back is better than too far forward.

Cant wait to be done with this, not even to have my jeep back, just to be done with this shit and all the little quirks...
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Old September 24th, 2013, 10:17 AM   #4
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Looks good to me. I did the same swap and I could barely fit my finger between the vc and firewall. Was running a mechanical fan also, and there's just not a ton of extra room up front.
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Old September 24th, 2013, 10:25 AM   #5
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Looks good to me. I did the same swap and I could barely fit my finger between the vc and firewall. Was running a mechanical fan also, and there's just not a ton of extra room up front.
Cool, knew there wasnt usually much clearance but wanted to make sure.

What did you do with the ps frame mount, I just added 3/16 plate on top with some gussets/bracing to extend it(was gonna add a spacer to compensate on ds but doesnt appear to need it). Seems like its gonna work out well given it was welded without test fitting lol.

Also running the aw4 and from what I can tell so far my flat belly skid from barnes is gonna work too. :D
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Old September 24th, 2013, 07:04 PM   #6
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Same thing. Welded a plate on too of the old mount.

I converted to an aw4 and with a 1" body lift I could have easily put the belly flat.

Sold it a few months ago, I regret it quite a bit.
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Old September 24th, 2013, 10:38 PM   #7
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Same thing. Welded a plate on too of the old mount.

I converted to an aw4 and with a 1" body lift I could have easily put the belly flat.

Sold it a few months ago, I regret it quite a bit.
Ya no one really cover the mount in the writeups, it was mentioned but never saw any pics or heard of what they did.

Looks like ill need a 1" drop, otherwise the bottom of the trans will hit the front of the. skid. A 1" mml would fix this but as far back as it is I wont clear the bell housing right. Down the road ill weld a mml on and make it move the drivetrain a 1/2 inch forward

Just gotta get this moving, closing on a house friday and baby due on the 4th, now or never lol
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Old September 24th, 2013, 11:04 PM   #8
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I did the same swap in my 93. I think I have a little more room than that but my fan still clears (barely). I just moved my grill forward an inch.
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Old September 24th, 2013, 11:09 PM   #9
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I also made my own mounts and moved them up about 2-3 inches and put the motor at more of an angle with front up. That helped a lot with rear shaft and keep things up for flat skid.



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Old September 25th, 2013, 08:17 PM   #10
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I had a 1" MML on mine. I set everything up at the same time, so I'm not sure how it looked without.
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Old September 26th, 2013, 08:46 AM   #11
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Well our closing date got pushed back a week, im gonna pull it back out and just do a mml and scoot it forward an inch.

Now that I got to thinking I remember that the used tube fenders I bought moved my grille forward a good inch anyways, so I should be good. Might even allow me to run the same rear shaft since it was made too short anyways
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