1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

How do you unseize a v8?

Discussion in '40- & 55-Series Tech' started by kvk2xtreme, Feb 9, 2004.

  1. kvk2xtreme

    kvk2xtreme

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 9, 2004
    I've got a rebuilt engine that has not rotated in quite some time... I pulled the heads and tried cranking the engine with the starter on but it won't budge!! I saturated the cylinders with penetrating oil and it still won't move. I even attached a bar to the harmonic balancer and tried rotating it that way, but to no use. Does anyone have any suggestions? I'm desperate now.
     
  2. Rice

    Rice SILVER Star

    Messages:
    4,590
    Media:
    10
    Albums:
    1
    Likes Received:
    5,632
    Joined:
    May 2, 2003
    Location:
    GSO NC
    If a starter won't turn it over with no heads that's pretty tight. Is this engine on a motor stand or installed? What condition are the cylinder walls in, i.e. are they still nicely honed from the rebuild or are they rusted over? If rusted (and you plan to use this motor) I'd say you may wish to go ahead and pull the pistons and clean up the cylinder walls. If it's never been fired since the rebuild then saving the rings and walls from damage will help them seal once it's fired. Also, if the cam is new you may want to pull it back out to relube and help with breakin.
     
  3. dinkleberry

    dinkleberry

    Messages:
    303
    Likes Received:
    1
    Joined:
    May 15, 2003
    Location:
    Vermont
    If you can't spin it with the heads off somethin is way wrong. If there's rust in the cylinders, I'd pull it apart and check everything.

    That's just me though.

    Good luck.
     
  4. Bucket

    Bucket

    Messages:
    29
    Likes Received:
    0
    Joined:
    Dec 23, 2003
    Location:
    Cookeville, TN
    Try pouring Marvel Mystery Oil in each cylinder and let that sit a couple of days.
     
  5. FJ40Dude75

    FJ40Dude75

    Messages:
    248
    Likes Received:
    0
    Joined:
    Nov 12, 2002
    mmo works in rotary engines to unseize apex seals and so does atf
     
  6. VTCruiser

    VTCruiser

    Messages:
    3,454
    Likes Received:
    13
    Joined:
    Sep 12, 2003
    Location:
    Tacoma, WA
    I second the ATF notion, let it sit for a while too.
     
  7. kvk2xtreme

    kvk2xtreme

    Messages:
    9
    Likes Received:
    0
    Joined:
    Feb 9, 2004
    Hey Guys, I figured out what it was... after pulling the motor I noticed that the pressure plate cover was hitting the inside of the bellhousing. I guess I should have said that this was a V8 conversion with an Advance Adapters bellhousing.

    Well, thanks for all of your responses! :cheers:
     
  8. Rice

    Rice SILVER Star

    Messages:
    4,590
    Media:
    10
    Albums:
    1
    Likes Received:
    5,632
    Joined:
    May 2, 2003
    Location:
    GSO NC
    Thanks for letting us know. Dang sure should have thought of it. My last experience there was putting in a race engine and leaving a socket on a flywheel bolt. Turned over real well for about 1/2 revolution.
     
data-matched-content-rows-num="2,1" data-matched-content-columns-num="1,4" data-matched-content-ui-type="image_stacked" data-ad-format="autorelaxed">