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Unread 11-29-2011, 11:50 AM   #1
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Join Date: Nov 2011
Posts: 62
2.5 rad in a 4.0

I own a 94 2.5 and a 93 4.0 was wondering if my aftermarket radiator in my 2.5 will fit my 4.0

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Unread 11-29-2011, 12:04 PM   #2
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1995 YJ Wrangler 
Join Date: Mar 2005
Location: Morrow, OH
Posts: 698
I have a 1995 2.5 and got a 4.0 radiator with a bunch of parts I bought...

The 4.0 unit is thicker (more cores) for increased capacity.

edit: Meaning that it will physically fit but prolly won't cool it properly.
95 YJ 2.5L 5 speed, 4.88's, Aussie Locker D30, 35" Mud Rovers, Herculined tub, TKH rear bumper, Ford 8.8, JB Conv. SYE, Sylvania Silver Stars, T-MAX 9K winch, MORE 1" body lift, Turbo City oil pan skid, Rubicon Express 4" lift...

2012 KK Black all stock.

Last edited by mighty4banger; 11-29-2011 at 12:05 PM.. Reason: more info
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Unread 11-29-2011, 01:43 PM   #3
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1994 YJ Wrangler 
Join Date: Dec 2009
Location: Monroe, Mi
Posts: 386
I drove through the hottest part of a Michigan summer without any trouble. It seemed to do as well as it did with the 2.5.
1994 Wrangler...4.0 AW4 swapped, sye'd, 5.5" lift and 33's
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Unread 11-29-2011, 02:14 PM   #4
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1987 YJ Wrangler 
Join Date: Sep 2010
Location: Potosi, Wisconsin
Posts: 308
I went from a 2.5 to a 4.0 and have no problems. My radiator is a stock replacement aftermarket (meaning it wasn't anything special) that I put in about 10 years ago. At that time the place I bought it from said they only had one radiator listed for YJ's, motor size didn't matter and it had the auto tranny cooler too.
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Unread 11-29-2011, 03:13 PM   #5
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Yeah I think it will but didn't want to go threw all the hassel and find out it didn't! My 2.5 is a 5 speed my 4.0 is auto. Thanks for your help
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Unread 11-29-2011, 10:30 PM   #6
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1988 YJ Wrangler 
Join Date: Aug 2008
Location: Alberta
Posts: 1,323
The Rad for the 2.5 and 4.0 are the same rad. I swapped in a 4.3 V6 and I'm still using the 2.5's rad with no issues and don't even need the fan unless I'm in traffic or on the trail.
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