4.5 Liter to 4.9 Liter Engine Swap
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 3 of 3
Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 4.5 Liter to 4.9 Liter Engine Swap in Past Cadillac Vehicle Discussion; Hi There! I have a question and was wondering if anyone knew if you can swap a complete 4.5 Liter ...
  1. #1
    caddyman93 is offline Cadillac Owners Member
    Join Date
    Oct 2003
    Location
    Toronto, Canada
    Posts
    11

    4.5 Liter to 4.9 Liter Engine Swap

    Hi There! I have a question and was wondering if anyone knew if you can swap a complete 4.5 Liter V8 in a 1988 Caddy Sedan Deville for a complete 4.9 Liter from a 91 to 93 Deville. The wrecker near my house says this is possible, and that he has done one before in an 87 Deville, he says the 4.9L directly bolt up and all you have to do is change part of the wiring harness and ECM to make it run as a Multi-Port fuel injected engine instead of throttle body. Just wondering of anyone else knew the particulars of being able to do this. Thanks, Mike.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    bitdcc is offline Cadillac Owners Member
    Join Date
    Apr 2004
    Posts
    5

    Re: 4.5 Liter to 4.9 Liter Engine Swap

    Just a follow up... Did you ever do the swap and if so, what are the swap details for the multi-port f.i.???

  4. #3
    HippieD9 is offline Cadillac Owners Fanatic
    Join Date
    Nov 2003
    Location
    Suburb of Chicago
    Age
    31
    Posts
    176

    Re: 4.5 Liter to 4.9 Liter Engine Swap

    You just can't do it that easily. I've swapped a 4.9 in for a 4.1 in a 87 deville, but kept the TBI injection. Converting to MPI is just way more work than you want to do! If i remember right, you reuse the intake and TB, and the old valve covers (JUST the covers, you want the 4.9 heads) and exhaust manifolds. Other than that it's pretty simple. Let me know if you need more info.

    Peace,
    D.

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