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Thread: Motor seized g63b

  1. #1

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    Motor seized g63b

    So my question is, Is it possible for anything in transmission to cause the motor to lock up??



    I just rebuilt motor with new timing belt and components, head gasket, balance shaft elimination, jet valve elimination, added weber, all new ignition components. I started truck, sounded good for a bit, then i reved a bit nothing major and a loud knocking noise started so i turned it off. Started it again noise got louder so i pushed in clutch pedal it made a wierd clunking noise and motor seized.

  2. #2

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    maybe the flywheel or pressure got loose,and its wedged in the bellhousing

  3. #3

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    well ill be taking trans out soon so ill let you guys know. It better be transmission or Im gonna Blow the truck up

  4. #4

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    Well it turns out that number 4 rod came apart and bottom of rod went thru the block.......So after all the good I have spoke about these trucks it blew up in my face............

  5. #5

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    Thats bad news bud. Sorry to hear that . What was wrong with the engine that made you rebuild it to begin with? Did the rod break or did the cap bolts fail?

  6. #6

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    Quote Originally Posted by crvtec90 View Post
    Thats bad news bud. Sorry to hear that . What was wrong with the engine that made you rebuild it to begin with? Did the rod break or did the cap bolts fail?
    Well when I bought it, it had really no power to it, very very poor acceleration......so i just tore into it right away. no noise on way home. It got new everything.....I didnt touch rods crank or pistons......new oil pump, timing, ignition, fluids, gaskets, and a few performance changes. I havent looked at anything other then the bottom of rod out the block......ill post pic soon

  7. #7

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    Click image for larger version. 

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    This is what I c

  8. #8



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    New oil pump?
    Get us some picts of the other rod bearings. I have a feeling it was oil starved.
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  9. #9

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    Yep....brand new oil pump

  10. #10

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    Ill get some picts tomorrow.......Ill be very pissed if it was a faulty oil pump............Also think im gonna get my other max on the road instead of fixing this one. My 87 max has a 2.6 with 5 speed that came from somewhereelse and has a cracked block.....(in 2 places) it kept running great after the first crack i decided to go for another

  11. #11



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    did you pack or prime the pump? Bottom ends fail if there is no oil or a bolt came loose. To ensure a prime you would use a drill to spin the pump.
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  12. #12


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    The oil pump has to spin pretty fast to pump oil through the it. I prefer issuing the fitting on the intake manifold to brake booster. Or you can buy yourself a new fitting. Remove the oil pressure switch/sending unit from the oil filter housing, double check thread pitch with the fitting if you got one already, screw the fittig into the oil pressure switch/sending unit location, use a fluid pump and pump it into the fitting.
    1989 Mitsubishi mightymax; 1990 4g63 6 bolt swap: malhe 9.0 pistons, eagle h beam rods, acl race bearings, rebuilt head, evo 3 16g, aem afpr, Maft, 3" gm maf blow through, walbro 255 fuel pump, hks ssq bov, fmic, coil over plug, FIC 750 injectors, dsmlink, apexi avcr, AEM eugo, s90 throttlebody, JMF FIAC block off plate. LT1 T56 in the works.
    Why a mightymax? Why not? 18 psi FTW.

  13. #13

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    Quote Originally Posted by camoit View Post
    did you pack or prime the pump? Bottom ends fail if there is no oil or a bolt came loose. To ensure a prime you would use a drill to spin the pump.
    Didnt prime it, but i packed it with grease before install

  14. #14

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    Quote Originally Posted by 4doorciv View Post
    The oil pump has to spin pretty fast to pump oil through the it. I prefer issuing the fitting on the intake manifold to brake booster. Or you can buy yourself a new fitting. Remove the oil pressure switch/sending unit from the oil filter housing, double check thread pitch with the fitting if you got one already, screw the fittig into the oil pressure switch/sending unit location, use a fluid pump and pump it into the fitting.
    So i blew up my own truck.......awesome

  15. #15



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    Packing it with grease should have worked - are you sure the balance shaft belt that drives the oil pump didn't come off or lose teeth?
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  16. #16

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    the timing belt runs the oil pump i did a balance shaft elimination

  17. #17



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    Thoughtr you might have - still odd.
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  18. #18

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    Quote Originally Posted by pennyman1 View Post
    Thoughtr you might have - still odd.
    Yes sir it is........I dumped a bunch of money into it.....owell off to the g54b project......

  19. #19



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    If you can determine the reason for the failure, then you will be able to warn the next guy that comes along wanting to do the same thing.
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  20. #20

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    Quote Originally Posted by camoit View Post
    If you can determine the reason for the failure, then you will be able to warn the next guy that comes along wanting to do the same thing.
    Ill do some research.......itll be a few days before im pulling motor apart and out...........So I will post when I find out wtf happened

  21. #21

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    Im game to help out the mighty owners.....lol

  22. #22



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    This sucks the big one. That is why I finally said screw the stock stuff and just did, what I did to my truck. I can't tell you haw many heads, head gaskets, ignition modules, drive line center bearings, trans, front end parts and other what not's I went through over the past 30 years.
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  23. #23

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    Quote Originally Posted by camoit View Post
    This sucks the big one. That is why I finally said screw the stock stuff and just did, what I did to my truck. I can't tell you haw many heads, head gaskets, ignition modules, drive line center bearings, trans, front end parts and other what not's I went through over the past 30 years.
    yeppers sure does.......

  24. #24

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    That pic is hard to see but it looks like the rod end with no bolts or cap.

  25. #25

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    Quote Originally Posted by crvtec90 View Post
    That pic is hard to see but it looks like the rod end with no bolts or cap.
    That would be what it is sir. I didn't know rod had the force to go thru like that.

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