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Unread 06-02-2013, 07:17 AM   #1
J-Quad
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1995 YJ Wrangler 
 
Join Date: Aug 2008
Location: Mid-Michigan
Posts: 369
My 2.5L engine...

....has developed a serious knock. I like my 4 angry squirrels, I don't want to swap to a 6cyl, V8 or diesel. Soo..... I'm seriously considering locating a replacement engine to refresh and then swap out my knocking 2.5L in my '95 YJ.

According to our FAQ here, the 2.5L MPI engine came in the '91-'95 YJs. When I start asking around for a rebuildable 2.5L to swap it out with, are there other hoods I could find the same engine under?

Does the earlier TBI 4-cylinder engine run the same cylinder head and block and be a candidate to use as rebuid core?

Is there any sort of rebuilding/checks I should plan on doing with the original Multi-Port Injection (MPI) system - or - can I / should I just bolt it on the freshened longblock?

Thanks in Advance, Guys!

J-Quad

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-- '95 YJ, 4-cyl, 5-speed.
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Unread 06-02-2013, 07:42 AM   #2
Jeepsr4me
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Join Date: Dec 2004
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any 2.5 engine from about 84 up to the 2000's will work. The oil pan changed in 97. But dont worry about that as you can just swap your current pan on there when you do the swap. The older pan allows the exhaust to pass in between the trans and engine, the newer one allows it to pass in front of pan. Oil pump pick up may be different too. I have swapped 87 block into a 99, and 97 into a 91 and a couple of others. Just the block. Dist is same for a lot of years but there are different connectors and internals. Same for the oil pressure sender. some have 2 wires and othes have 1 wire. But all the external parts bolt right on with zero issues.
Also Dakaotas that have 2.5s are the same.. and Cherokees...
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Unread 05-02-2014, 02:44 PM   #3
J-Quad
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1995 YJ Wrangler 
 
Join Date: Aug 2008
Location: Mid-Michigan
Posts: 369
Sorry for being 10 months late in my reply, but --- THANKS for all the pointers, Jeepsr4me!

J-Quad
__________________
-- '95 YJ, 4-cyl, 5-speed.
From Dec-Mar, it wears an 80" snowplow. From Apr-Nov, it gets muddy on the 2-tracks!
"War does not determine who is right, war determines who is left."
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Unread 05-02-2014, 04:00 PM   #4
teeter02
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1995 YJ Wrangler 
 
Join Date: Jan 2014
Location: new tazewell, tn
Posts: 21
I got one from Auto Zone $1500.00, long block. No troubles with the long block its self. having elec issues currently. 3 yr warrenty
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Unread 05-02-2014, 04:46 PM   #5
Luuca
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2005 LJ Wrangler 
 
Join Date: Apr 2012
Location: Corona, CA
Posts: 2,390
For roughly $1800 I had a local rebuilder pull our 2.5, rebuild it, new everything including injectors and sensors, and re-install it. 12 month or 12,000 mile warranty. Dropped it off and 3 days later, drove it home.
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