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Spun Bearing Fresh Build. Cut losses?

Discussion in 'SN-95 and New Edge Mustangs' started by 97snakebite, Sep 20, 2018.

  1. 97snakebite

    97snakebite Well-Known Member Established Member

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    Sacramento
    Hey guys, looking for some input. Fresh Built Teksid with approx. 200 miles ( on the high end ) that spun a bearing. The car was still being tuned/broke-in and this was maybe 2 miles after hard pull to 60 in 2nd/3rd @ 3/4 throttle(T-5656 swap). I was sitting at a stop light when i heard the most horrible squealing followed by a hard shake and stall. I Immediately looked at Oil/fuel pressure and both was good as this happened. Pulled the car back to the crib. I scoped the cylinders and they look perfect. So I'm hoping its just crank and bearings and nothing got around the oil system.

    My question is best case scenario can I just have the crank and bearings swapped if that's the damage? No machining just cleaning.
    Or is it better to start from scratch? Coyote Swap?

    I haven't cracked the oil pan yet I'm doing that Sunday. I did put a socket on the crank and its rough to move

    Car info:
    D1 3.20 T-56 Holley HP ID1000
     
  2. NewOrleans-YAT

    NewOrleans-YAT Member Established Member

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    New Orleans
    oh man. that is terrible. My tuner just asked me to log my first 3rd gear full pull. I built my motor and I am nervous as all getup. did you do the build?
     
  3. 97snakebite

    97snakebite Well-Known Member Established Member

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    Aug 24, 2006
    Location:
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    Yeah it sucks. I had a local shop assemble the short block for me and do the timing. I built the heads. I supplied all parts but the bearings as I wanted them to order since they were putting it together.

    Sent from my SM-N920P using the svtperformance.com mobile app
     
  4. jaxbusa

    jaxbusa Active Member Established Member

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    Sep 29, 2015
    Location:
    Northeast Florida
    Sorry to hear. I had a similar situation years ago with a 351 that pissed me off so bad I sold everything and gave up the Mustang game for about 8 years. I would probably fix whatever is wrong and keep it the way it is.


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  5. Sluggie24

    Sluggie24 Active Member Established Member

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    Jan 12, 2017
    What were the bearing clearances set at? If they set the clearances then the cost of repair should be on them.

    My bet is that they are unfamiliar with setting bearing clearances on an aluminum block and a main closed up too tight when the engine was hot.
     
  6. 52merc

    52merc Active Member Established Member

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    Nov 15, 2000
    Location:
    Calgary, Alberta, Canada
    OE specs are:
    Mains: 0.025-0.045 mm [0.001-0.0018"]
    Throws: 0.027-0.069 mm [0.0011-0.0027"]

    My guesses:
    1. Not cleaned properly.
    2. Poor pre-lube procedures.
    3. Wrong oil.
    4. Bad machining of the parts.
    5. Poor assembly technique - just not checking clearances the way they should.
    6. Any and all of the above.

    As the engine warms up, the clearances increase slightly.

    Sorry man. That really sucks and if it were me I'd be really mad. That's why I'm the only one to assemble my engines. Then its real easy to know who blame.
     
  7. 98 svt

    98 svt Well-Known Member Established Member

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    Make sure there's no damage to the cams/retainers.
    I spun a bearing, and it cooked my cams as well.
     
  8. Three21

    Three21 Member Established Member

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    Dec 28, 2013
    Location:
    H-town, TX
    Sounds like you might have shut it down before it could do too much damage. Best case is a rod journal and you get your crank turned 0.010 under on the damaged journal(s) and run oversized bearings and possibly replace the rod.

    With limited carnage I would not be looking into a swap.

    Odd that it happened after the pulls and not during. Have you drained the oil to see how much material (and oil volume) is in there? What's the bottom end look like?
     

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