Swap 4.9l v8 and 4.6l v8 northstar
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 8 of 8
Northstar Engines and System Technical Discussion Discussion, Swap 4.9l v8 and 4.6l v8 northstar in Cadillac Engine Technical Discussion; I have a 1994 Cadillac seville with a 4.6l v8 northstar and the engine went (head gasket leak) and was ...
  1. #1
    rellsun is offline Cadillac Owners Member
    Automobile(s): 1994 Seville SLS
    Join Date
    Jan 2009
    Age
    22
    Posts
    10

    Question Swap 4.9l v8 and 4.6l v8 northstar

    I have a 1994 Cadillac seville with a 4.6l v8 northstar and the engine went (head gasket leak) and was wandering if a can swap it out with a 1993 deville 4.9l v8?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,307

    Re: Swap 4.9l v8 and 4.6l v8 northstar

    No. Different trans. Different PCM. Probably motor mounts and other things I'm not thinking about.

  4. #3
    Destroyer's Avatar
    Destroyer is offline Cadillac Owners Master
    Automobile(s): '67 Cutlass,'92 Z28, '12 Crosstour, '12 Cube,00 GMC 4500
    Join Date
    Oct 2003
    Location
    Florida
    Age
    42
    Posts
    6,167

    Re: Swap 4.9l v8 and 4.6l v8 northstar

    Dude just get another car.

  5. #4
    CaptainFishpond's Avatar
    CaptainFishpond is offline Banned
    Automobile(s): 99 DeVille (Grace Slick)
    Join Date
    Jul 2006
    Location
    Cleveland
    Age
    28
    Posts
    333

    Re: Swap 4.9l v8 and 4.6l v8 northstar

    Drop in an LT1!

  6. #5
    Highline Cady's Avatar
    Highline Cady is offline Cadillac Owners Fanatic
    Automobile(s): Nitrous03DHS,AJtune,Corsa,Volant,3.71s,Grille,tinted,stall'd
    Join Date
    May 2007
    Location
    Wisconsin
    Age
    37
    Posts
    305

    Re: Swap 4.9l v8 and 4.6l v8 northstar

    Why why why if your going through the hassle of switching to a different motor would you ever pick a 4.9? Swap a fwd Impala SS running gear, it'd probably be easier. Personally just stick another N* in it and do basic maintenance and you probably wouldn't be in this situation to begin with.

  7. #6
    pimpdaddycaddy91's Avatar
    pimpdaddycaddy91 is offline Cadillac Owners Fanatic
    Join Date
    May 2005
    Location
    West Valley City, Utah, United
    Age
    31
    Posts
    122

    Re: Swap 4.9l v8 and 4.6l v8 northstar

    I think that it would be possible but it would be alot of work and you would run into alot of problems. I think that it would be less work to fix the Northstar. If your up to swapping engines out then you should be able to tackle the HG. I just finished my first HG/headbolts project, biggest job I ever did but I finished it and it works! even with a few extra bolts left over lol. That always happens to me.
    Dont get me wrong I love the 4.9, it always amazes me how much power it has and it will run to 200,000+ miles with no major problems unlike the Northstar HG. The problem is the 4T60E that it is mated to. You will go through 2 of them for every 4.9 engine.

  8. #7
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
    Automobile(s): The Northstar Tuner
    Join Date
    Apr 2007
    Location
    Rock Hill SC
    Age
    46
    Posts
    2,754

    Re: Swap 4.9l v8 and 4.6l v8 northstar

    I have seen a lot of 4.5L & 4.9L Head Gasket failures, so what would the advantage be?

  9. #8
    rellsun is offline Cadillac Owners Member
    Automobile(s): 1994 Seville SLS
    Join Date
    Jan 2009
    Age
    22
    Posts
    10

    Re: Swap 4.9l v8 and 4.6l v8 northstar

    Well i was going to have a friend do the work and he said its best to get a rebuild or one in good running condition instead of getting a junkyard one. so i saw a 1993 deville with a 4.9 on craigslist for 600 compared to 1000-2500 for a junkyard or rebuilt motor. Anyway didn't think it would work but doesn't hurt to ask.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting