4.0 GEMS engine from '96 RR into D90? - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old September 24th, 2012, 09:20 PM
bergxu
Status: Offline
Richard
1994 D90
Member
 
Join Date: Apr 2011
Location: Midwest-South, USA
Posts: 4
4.0 GEMS engine from '96 RR into D90?

Gentlemen,

So we've determined the best course of action with my mate's '94 D90 will be an engine swap as there are big chunks of metal in the oil pan and with time being of the essence, a tear down isn't in the cards. I know of a '96 4 litre Rangie with a good engine and was curious as to what all is involved with swapping that mill into the Defender. Can we basically transfer all of the Defender's ancillaries over to the Rangie's long block and will it be a direct bolt up to the manual transmission or will the flywheel need to be swapped as well? I know the RR's engine is a 'serpentine' type and of course the Defender engine has multiple belts and since his has A/C I'm guessing he'll want to keep that so hypothetically speaking, if I strip the front of the 4.0 bare, will everything just bolt right on from the 3.9? Lastly, will the exhaust manifolds mate up to the 4.0 heads or will the old heads need to be reused?

Sorry for all the questions--just want to help him get on the road as quickly as possible

Cheers,
RG
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old September 24th, 2012, 09:39 PM
woldd90's Avatar
woldd90
Status: Offline
Scott
1997 D90 ST #1444
Site Team
 
Join Date: Aug 2005
Location: Georgia
Posts: 5,329
Several have changed the 94's over to a serpentine belt... Not sure how you would connect the computers on a 14cux vs. the Gems motors.
__________________
Scott

Reply With Quote
  #3  
Old September 24th, 2012, 10:02 PM
the rover shop
Status: Offline
shayne young
89,93 & 95 camel trophy 110s 06 130
Member
 
Join Date: Sep 2011
Location: ft lauderdale florida
Posts: 5,225
yep...blocks the same except for the crank position sensor location which you don't use anyway.(3.9 is distributor).everything will swap from the 3.9 onto the 4.0 long block, yes you will need to change the flywheel..make sure your oil pump is good and clean before you swap it onto the new block...
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old September 25th, 2012, 08:06 AM
LRover's Avatar
LRover
Status: Offline
J. Michael McCaig
D90 ST, LR110, Series IIa, RRC
Member
 
Join Date: Oct 2003
Location: VA
Posts: 479
Yeah, use the front cover off the 3.9 as you need to retain the distributor. You will need to change the cam so it will work with the distributor. You need to buy or make a spacer for the front pully as the crankshaft nose is longer. There may be a dowel pin on the back of the crankshaft that you will either need to pull out or cut off flush so the flywheel will bolt up. Sounds worse than it is but it's a good time to change out some seals anyway before the engine goes in.
Reply With Quote
  #5  
Old September 25th, 2012, 09:34 AM
the rover shop
Status: Offline
shayne young
89,93 & 95 camel trophy 110s 06 130
Member
 
Join Date: Sep 2011
Location: ft lauderdale florida
Posts: 5,225
Oh yeah.. Forgot about the front dizzy drive gear..
Reply With Quote
  #6  
Old September 25th, 2012, 01:51 PM
rovertek's Avatar
rovertek
Status: Offline
chris
D130, 2001+99 p38
Member
 
Join Date: Jul 2012
Location: Long Island , New York
Posts: 500
Quote:
Originally Posted by LRover View Post
You need to buy or make a spacer for the front pully as the crankshaft nose is longer.
you can use a old lower timing gear machine the teeth off ..the perfect spacer and is keyed to crank
__________________
No Mall crawler here
Reply With Quote
  #7  
Old September 27th, 2012, 07:38 AM
bergxu
Status: Offline
Richard
1994 D90
Member
 
Join Date: Apr 2011
Location: Midwest-South, USA
Posts: 4
Thanks fellas. We decided that we'd have a 4.6 done up by a fellow out in VT who came highly recommended by Rovers North. About $6,500 for the engine but it ought to be worth it.

------ Follow up post added September 27th, 2012 06:44 AM ------

Actually, just out of curiosity, will a 4.6 GEMS engine from a '97 P38 Rangie also swap over with the same changes as the 4.0 would require? I remembered a friend has a complete, running '97 RR which is a parts truck.

So if I need to swap the 3.9 cam over, I suppose then that I also will use the rods and valve gear from the 3.9 or no? I do understand about the oil pump/front cover and we would indeed want to keep the multi belt setup as he has A/C.
Reply With Quote
  #8  
Old September 27th, 2012, 08:28 AM
o2batsea's Avatar
o2batsea
Status: Online
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,500
Registry
Quote:
About $6,500 for the engine but it ought to be worth it.
(Sound of jawbone hitting desk) I am guessing that you're going with a brand new engine for 6500 clams.
All you are using from the (used) 4.6 is the block and heads. All the other stuff comes from the donor 3.9. Timing gears, front cover, exhaust, starter, intake, blah blah blah...You aught use a new (crower) cam and lifters which you can get from about a gazillion on line retailers for about $200. Another $200 for gaskets. A buck's worth of pipe for a pulley spacer. $50 to rent an engine crane. However you will not get a shop to do this, you'd have to do it yourself and that may span several weeks.

Thing is that you can probably find a dozen good used 3.9 engines locally that you could just swap over in a weekend and be done, and save maybe what, $6000. Oh well your money.
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
  #9  
Old September 27th, 2012, 09:54 AM
leastonce's Avatar
leastonce
Status: Offline
Jason England
D-90 White 95 SW #65
Site Team
 
Join Date: Jul 2009
Location: NYC
Posts: 6,078
Registry
For that kind of money you should transplant in a 300tdi and experience 30mpg and the ability to run underwater!
__________________
Quote:
Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
Car Camping Collective founding member and Chief Executive Officer
Cat Camping Collective founding member and Chief Executive Officer
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
90, d90, engine

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
4.0 Engine needs replacement... plz HELP! Cyborg Defender Technical Discussions 28 May 3rd, 2008 03:58 AM
D90 won't start! rover4x4 Defender Technical Discussions 32 June 13th, 2005 08:42 AM
D90 Tshirts norros Misc. Chit-Chat 16 March 8th, 2005 11:05 AM
97 D90 check engine light - on now off? Eric_S Defender Technical Discussions 3 January 28th, 2005 10:17 AM
D90 Engine Overhaul Landyfun1 Defender Technical Discussions 19 April 20th, 2004 06:02 PM


All times are GMT -5. The time now is 03:34 PM.


Copyright