XJ40 ( XJ81 ) 1986 - 1994

Engine swap XJ40

Old 12-06-2018, 05:40 PM
nightstalker's Avatar
Junior Member
Thread Starter
Join Date: Apr 2014
Location: Adelaide Australia
Posts: 6
Likes: 0
Received 6 Likes on 4 Posts
Default Engine swap XJ40

Just putting it out there , i have an XJ40 1988 3.6 with possible head issues , 2000 + if needs rebuild . my question is , i can get my hands on a good 4.0 motor for way less - $500 . now if i stripped my motor of all its bolt ons , intake manifold , throttle body , injectors , and the like , would this be a viable alternative . Is there anything else i would need to swap . Any and all advise appreciated . Don't want to let her go the way many Jags go with this problem . Thank Mark
Old 12-10-2018, 06:45 PM
Senior Member
Join Date: Sep 2018
Location: Metro Detroit
Posts: 103
Received 38 Likes on 24 Posts

I don't have the mechanical experience to suggest an answer however if this photo of your car is indicative of the whole car's condition then I would exhaust all possibilities including spending the $2000. What could you buy for 2k? Then you would have to spend on repairs the prior owner chose not to do. I'm not too much for white but it suites your car, the wheels, chrome fender flares, etc. Good luck. I am sure the gear heads will properly direct you.
Old 12-10-2018, 09:47 PM
Robman25's Avatar
Senior Member
Join Date: Aug 2017
Location: Auckland
Posts: 802
Received 186 Likes on 164 Posts

Transmission would need to be changed as well from memory. Just check before you do take the plunge. Keep the 4.0 injectors and you would need the Engine ECU and Trans module as wel.
Old 12-11-2018, 12:04 AM
Veteran Member
Join Date: Sep 2012
Location: Victoria BC Canada
Posts: 1,898
Received 1,228 Likes on 769 Posts

Why not fix the head? If it's beyond repair surely a replacement head wouldn't be THAT expensive if you did the work yourself? If you're prepared to peel off all the ancillaries ie 'bolt ons' like manifolds etc to do the engine swap, you may as well whip off the head, most of the work in removing the head will already be done taking off all the ancillaries, just a few more bolts and bob's yer uncle.

Related Topics
Thread Starter
Last Post
XJ40 ( XJ81 )
06-02-2016 10:20 PM
XJ XJ8 / XJR ( X308 )
04-29-2013 01:20 PM
XJ40 ( XJ81 )
12-25-2011 06:23 AM
XK8 / XKR ( X100 )
10-19-2010 01:33 PM
XJ40 ( XJ81 )
06-10-2007 06:03 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Search this Thread
Quick Reply: Engine swap XJ40

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: