Diagnose my bearing failure

Posted by gsxitement, May 5, 2018

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  1. gsxitement

    gsxitement Proven Member

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    Joined Dec 9, 2002
    staten island, New York
    Ok. Lowdown. 2.3 liter stroker. Road race motor. Rebuilt it over the winter with King Bearings +.001" for oil clearance. No squirters, no bshafts. Car was on the Dyno. Did fine. Was running Brad Penn break-in oil. SAE 30. Went to Pocono for an event. Changed the oil to Brad Penn 20w50. Was on false grid with the motor idling for 15 minutes. Two laps of caution. They dropped the green flag, made it 3 corners and spun #3 rod bearing. Got the motor out and dissassembled. What do y'all think? Oil pressure was fine. Only thing I noticed was oil pressure was higher than normal when trying to coast back to the pits. 60psi @3K rpm.
    Pics: IMG_20180505_130030.jpg IMG_20180505_130033.jpg MVIMG_20180505_130036.jpg MVIMG_20180505_130039.jpg MVIMG_20180505_130042.jpg IMG_20180505_130045.jpg IMG_20180505_130048.jpg IMG_20180505_130050.jpg IMG_20180505_130053.jpg IMG_20180505_153736.jpg IMG_20180505_153858.jpg
     

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    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  2. dustyboner

    dustyboner Proven Member

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    abq, New Mexico
    its hard to say from just looking at the bearings. After a bearing shreds, every thing gets chewed up. you could of had a restricted oil passage. if your pressure sensor is upsteam of the restriction it will appear to have good (or high) oil pressure.

    It would be impossible to tell now because the pieces of bearing are clogging everything now.
     
  3. brian9397gsx

    brian9397gsx Proven Member

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    sioux city, Iowa
    The way I'm interpreting it and I'm no engine builder. Up till the center main the outer shell is wiped then the other downstream look as though they've gotten metal from the other failed bearings. Myself I would be inspecting the oil passages in the block for trash and the crank oil drill passages. Pull out the rear block galley plug and brush the sh** out of it and make sure nothing is stuck inside.
    That would be the direction I would take especially since you had higher than normal pressure indicating a blockage somewhere in your oiling system.
     
    My DSM:
    brian9397gsx 1993 Mitsubishi Eclipse GSX

    19.80 @ 35.55 MPH
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  4. gsxitement

    gsxitement Proven Member

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    staten island, New York
    The higher then normal oil pressure was only after the bearing went. I should've specified that. Which was probably from all the junk blocking the crank oiling ports.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  5. gsxitement

    gsxitement Proven Member

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    Joined Dec 9, 2002
    staten island, New York
    My pressure gauge is mechanical. It gets it's feed right at the oil filter housing. It's just weird that the front of the motor is cooked, while the last few bearings in the back of the motor are not as bad. The bearings in the back of the motor show signs of debris fouling, but other than that, they're not terrible. If it was an oil supply problem, the wear would be the opposite. The bearings would would get worse the further you got from the oil pump.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  6. motomattx

    motomattx Proven Member

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    wampum, Pennsylvania
    What kind of oil pump are you running? what kind of filter? does it have a bypass?, how many miles on it? what do the piston skirts look like? that looks like a pump failure or the oil pickup in the pan was operating uncovered from oil being pushed away from it, the 2.3 setup is hard on bearings as is, if you revved it very high that might have wiped the bearing, clogged the filter and then starved the others, otherwise pump failure or internal oil pressure leak somewhere.
     
    My DSM:
    1995 Mitsubishi Eclipse GST

    Drag Race Build

    GT42   manual
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  7. diambo4life

    diambo4life Proven Member

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    Joined Apr 18, 2002
    Edmond, Oklahoma
    Verify your oil clearances again.
     
    My DSM:
    1991 Mitsubishi Galant VR-4

    Street Build

    710 whp   501 lb/ft
    1991 Eagle Talon TSi AWD (sold)

    10.56 @ 136.45 MPH
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  8. gsxitement

    gsxitement Proven Member

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    Joined Dec 9, 2002
    staten island, New York
    6 bolt straight cut oil pump. Magnus rebuildable oil filter, OFH port mod, Pistons are fine. 18 miles on the motor. To be fair, we'll say ten of those miles were from being on the Dyno and the three laps around Poconos S/E course. The rest were from driving around the paddock and doing figure 8's and circles to break in the Evo3 LSD I put in.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  9. gsxitement

    gsxitement Proven Member

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    staten island, New York
    Oil clearance with the King +.001" was .003". I eliminated the squirters and wanted to bleed off the excess pressure so I went with these bearings.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  10. donniekak

    donniekak DSM Wiseman

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    Surprise, Arizona
    How was the crankshaft prepared? Cut or std sized? Were the galley balls removed for cleaning?
     
    My DSM:
    1991 Eagle Talon TSi AWD

    Street Build

      manual
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  11. gsxitement

    gsxitement Proven Member

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    staten island, New York
    Crank was just given a light polish. When the motor came apart during the off season, there was nothing wrong with the motor. So the crank got a light polish and a bath. I do believe the balls were pulled.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  12. gsxitement

    gsxitement Proven Member

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    Joined Dec 9, 2002
    staten island, New York
    I'm also running a Moroso pan, so not entirely sure the pickup got uncovered.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  13. motomattx

    motomattx Proven Member

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    wampum, Pennsylvania
    Something bad happened with that low of miles on those bearings, does the magnus setup have a bypass valve for a clogged filter? Im wondering if the filter clogged and cost you oil supply to your bearings, that or some type of internal pressure leak like I said earlier. Pull a couple of your cam caps and lets see the bearing surfaces on them.
     
    Last edited: May 6, 2018
    My DSM:
    1995 Mitsubishi Eclipse GST

    Drag Race Build

    GT42   manual
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  14. gsxitement

    gsxitement Proven Member

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    Joined Dec 9, 2002
    staten island, New York

    Will do.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  15. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    So from the last failure did you have the block hot tanked?or was there a previous failure? I thought I remember somethig about bearings in your off season tear down, is it possible the crank journals are out of round? And I told you to get rid of that magnus filter. :idontknow:
     
    My DSM:
    1999 Mitsubishi Eclipse GSX

    Drag Race Build

    11.128 @ 132.5 MPH
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  16. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    The magnus has no relief valve, it has a magnet on the top, but otherwise is a solid stainless mesh filter element with a steel top, in an aluminum shell, with a way too thin o ring to seal to the ofh.
     
    My DSM:
    1999 Mitsubishi Eclipse GSX

    Drag Race Build

    11.128 @ 132.5 MPH
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  17. gsxitement

    gsxitement Proven Member

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    Joined Dec 9, 2002
    staten island, New York

    Lol. The filter wasn't the problem. So thing else caused the issue. Yeah we had a failing oil pump last season and we're lucky to catch it before it caused catastrophic failure. The block wasn't hot tanked, but I cleaned the hell out if it. We'll see what the machine shop says. I've been running that Magnus filter since 2012. I like it.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  18. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    I know you like it, just saying! Haha

    Wonder if the previous oil pump failure contributed to this, due to incomplete cleaning? Or what if it’s the same reason both pumps failed? What do you think?
     
    My DSM:
    1999 Mitsubishi Eclipse GSX

    Drag Race Build

    11.128 @ 132.5 MPH
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  19. gsxitement

    gsxitement Proven Member

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    232
    Joined Dec 9, 2002
    staten island, New York

    The previous pump failure was from it being a helical oil pump with a stub shaft. And even then, it didn't break anything. There was no metal in the motor after that. It certainly didn't shred a bearing. That motor was together for something like 6 years or so. And it never missed a beat. We'll see what King says when I send them the pics.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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    Archer Fabrications likes this.
  20. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    Scottsdale, Arizona
    In for what they say, I was going to run king, I see
    You got ACL trimetals this time though, which is what I used
     
    My DSM:
    1999 Mitsubishi Eclipse GSX

    Drag Race Build

    11.128 @ 132.5 MPH
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    1990TSIAWDTALON and gsxitement like this.
  21. dustyboner

    dustyboner Proven Member

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    abq, New Mexico
    calico coated ACL's are the way to go
     

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  22. 95eclipser

    95eclipser Proven Member

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    Manassas, Virginia
    Little disappointed to see this happen to those new design king bearings. Very interested in what the machine shop comes back with.
     
    My DSM:
    1999 Mitsubishi Eclipse GSX

    Street Build

    464 whp   379 lb/ft
    1997 Mitsubishi Eclipse GSX

    10.920 @ 133.900 MPH
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  23. gsxitement

    gsxitement Proven Member

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    Joined Dec 9, 2002
    staten island, New York
    I sent the pics and as much info as I could to King. The guys there are really nice. I highly doubt it was a bearing defect or malfunction on the bearing end. Most likely a piece of trash or maybe spinning the car on the Dyno with the break-in oil in there? We'll find out.
     
    My DSM:
    1998 Mitsubishi Eclipse GSX

    11.930 @ 119.000 MPH
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  24. 95eclipser

    95eclipser Proven Member

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    Joined Feb 3, 2006
    Manassas, Virginia
    Are you gonna send the oil out for inspection?
     
    My DSM:
    1999 Mitsubishi Eclipse GSX

    Street Build

    464 whp   379 lb/ft
    1997 Mitsubishi Eclipse GSX

    10.920 @ 133.900 MPH
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  25. Twinturbo120

    Twinturbo120 Supporting Member

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    Joined Aug 14, 2010
    Miami, Florida
    Interesting, I run the king bearings too, just idled and ran around the block for a bit LOL

    Have to check clearances, make sure all the oil galleys are clean, check the oil pump too.

    If you had healthy oil pressure, this would make it seem like you have a foreign contamination.
     

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