Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

3.4L Engine Swap

Discussion in '1983-2005 S-Series models' started by 4x4Jimmy, Jun 3, 2002.

  1. 4x4Jimmy

    4x4Jimmy Newbie

    Joined:
    Jun 3, 2002
    Posts:
    3
    Likes Received:
    0
    Location:
    Colorado
    To do a 3.4L engine swap into my 86 Jimmy, with the weak 2.8L what mods would I have to do? Or is it I can just pull out the 2.8 and drop the 3.4 in? And also is there a website that has crate 3.4 engines for sale? thanks for all the help
     
  2. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    Since you have a carb, then it should be pretty much a direct swap. If you want to pep it up a little more, Edelbrock makes an intake for the 2.8/3.4 liter engines that will accept a Holley 390 cfm 4-barrel carb. The folks at www.sdpc2000.com have the 3.4 liter long block for sale.
     
  3. 4x4Jimmy

    4x4Jimmy Newbie

    Joined:
    Jun 3, 2002
    Posts:
    3
    Likes Received:
    0
    Location:
    Colorado
    Mine dosent have the carb, its the TBI model. Could I still do the swap? or would i have to make a bunch of mods?
     
  4. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    Hmm, I didn't know the S-trucks had EFI in '86. You'll probably need to call the folks at Scoggins-Dickey and see if they know anything about the swap. There may be some notes in their manuals on what, if any mods are required.
     
  5. scrappyk5

    scrappyk5 1/2 ton status

    Joined:
    Mar 17, 2002
    Posts:
    2,099
    Likes Received:
    0
    Location:
    virginia
    1987 was the first year for the tbi.

    go to www.s10-4x4.org

    there are a few of us who have done the 3.4 swap. i have and its really easy.
     
  6. Blaze

    Blaze 1/2 ton status

    Joined:
    Aug 28, 2000
    Posts:
    3,285
    Likes Received:
    0
    Location:
    Raleigh, NC
    Hey, is this volpster? I noticed the siggy was the same. This is Bryan from the first Jam. How is it going?
     
  7. scrappyk5

    scrappyk5 1/2 ton status

    Joined:
    Mar 17, 2002
    Posts:
    2,099
    Likes Received:
    0
    Location:
    virginia
    hey brian , nice to see you floating around. yeah m, been coming here ever since i got my k5. i still have my s15 and it get bigger and better everyday. where have you been ?
     
  8. Blaze

    Blaze 1/2 ton status

    Joined:
    Aug 28, 2000
    Posts:
    3,285
    Likes Received:
    0
    Location:
    Raleigh, NC
    Ah, I've been working. The S-10 is just sitting, collecting rust. Can't afford to put insurance on it anymore, so it is just sitting for a while. Most of my money is going into my Firebird and Trans Am projects. How long have you had a K5? I'm probably buying a 79 longbed Chevy in a little while, then I'll be wheeling again!
     
  9. s10350power

    s10350power Registered Member

    Joined:
    Aug 6, 2002
    Posts:
    16
    Likes Received:
    0
    Location:
    Maryland
    I was thinking about the same thing but for the price of the 3.4 u can just buy a rebuilt 350 and the conversion kit. I think my local gm dealer told me that it was a direct swap and mine is a 88
     
  10. scrappyk5

    scrappyk5 1/2 ton status

    Joined:
    Mar 17, 2002
    Posts:
    2,099
    Likes Received:
    0
    Location:
    virginia
    well the cost of my 3.4 motor was about $1600.00 , including
    gaskets. i just switched everything over from my 2.8. plus me and some friends put it in , so that saved on labor. and
    you can use the original tranny.
    now if you go 350, you will have to change alot more and the cost will be alot more.
     

Share This Page