Buick LeSabre motor swap

Asked by Feb 09, 2018 at 06:23 PM about the 1985 Buick LeSabre

Question type: Maintenance & Repair

I have a 1985 Buick LeSabre and I wanted to know if I
could put a 5.7L v8 from a 93 Roadmaster  into the
LeSabre without having to modify anything crazy

3 Answers

3,130

It will not be "plug n play" you will have some modifications, don't know where you draw the line on Crazy. 1985 was the last year they made rear drive LeSabres...a V6 was the standard engine but most had a 350 V8. If I was doing it, I would also use the Roadmaster transmission. If you don't I don't know if the Roadmaster V8 will bolt to the LeSabre transmission. The other reason to use the transmission is after 1991 the transmissions were electronic and when you make the swap you MUST use the Roadmaster ECM to run the engine and it also controls the transmission so it make sense to use them together. Don't expect any of the wiring to plug so you need to get the engine harness from the Roadmaster to make the job easier.

1 people found this helpful.

So if I use the Roadmaster tranny and harness I should be good? By crazy I just mean cuts or welds as I do not possess the necessary tools

Or what if I am taking it from fuel injection to carbureted would that help at all

Your Answer:

LeSabre

Looking for a Used LeSabre in your area?

CarGurus has 10 nationwide LeSabre listings starting at $5,995.

Postal Code:

Buick LeSabre Experts

  • #1
    John Saffrahn
    Reputation
    2,360
  • #2
    Austin Gaboda
    Reputation
    1,550
  • #3
    POPEYE99
    Reputation
    1,390
View All

Related Models For Sale

Used Chevrolet Impala
34 Great Deals out of 1,046 listings starting at $1,994
Used Buick Regal
4 Great Deals out of 135 listings starting at $6,988
Used Buick Century
9 listings starting at $2,997
Used Honda Accord
59 Great Deals out of 1,668 listings starting at $1,995
Used Cadillac DeVille
15 listings
Used Dodge Charger
53 Great Deals out of 943 listings starting at $4,750
Used Lincoln Town Car
19 listings starting at $6,995
Used Toyota Camry
62 Great Deals out of 1,812 listings starting at $2,000
Used Ford Taurus
6 Great Deals out of 345 listings starting at $5,795

Used Cars for Sale

2005 Buick LeSabre For Sale
3 listings starting at $5,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.