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Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > 2.5l to 4.0l swap

TJ BDS 2" suspension lift!! FINALLY a GREAT 2" l50% Off Sale at KrawlOff-Road.comTactical Recovery Equipment Soft Shackles!!!

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Unread 03-15-2015, 02:27 PM   #1
Paxter
Registered User
2000 TJ Wrangler 
 
Join Date: Jan 2011
Location: Monterey, CA
Posts: 190
Hey everyone. I have a 99 tj with a 2.5l engine in it. It is still drive able but it's on its last leg. I have a 4.0l engine from my previous 2000 wrangler that I took out. I was wondering what needs to be done to swap the engines out.
What kind of wiring can I use from the 2.5l if any?
Do I need to change the motor mount location?
The 4.0l has A/C and I plan on just taking that out.
And since I live in California am I going to have any problems with smog?

I'm sure I have more questions but I can't think right now. Thanks guys

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Unread 03-16-2015, 08:55 AM   #2
StanF
Web Wheeler
1995 YJ Wrangler 
 
Join Date: Feb 2013
Location: Austin, Texas
Posts: 1,495
I've heard of other people having terrible issues with engine swaps in CA. I'd proceed carefully...and check with your state inspectors.
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Unread 03-16-2015, 02:54 PM   #3
Wheelin98TJ
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1998 TJ Wrangler 
 
Join Date: Apr 2004
Location: , Southeast MI
Posts: 25,304
Check out this thread:

2.5-4.0 swap is underway!!
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Unread 03-16-2015, 11:50 PM   #4
Paxter
Registered User
2000 TJ Wrangler 
 
Join Date: Jan 2011
Location: Monterey, CA
Posts: 190
Thank you for the replies. If worse comes to worse I will just register it in Oregon under my parents. As far as all the wiring. I was able to save everything from the 2000 wrangler for the 4.0
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