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Metal shaving in oil system?

Posted by AndrewC, Feb 25, 2018

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  1. AndrewC

    AndrewC Proven Member

    59
    2
    Joined Nov 6, 2017
    Portland, Oregon
    I'm rebuilding a 6 bolt at the moment that chucked the oil shaft bearing (some how) and it was just sitting in the oil pan. I'm doing a balance shaft delete and and machining the engine. I know that I really shouldn't be machining the crank but the car is just going to be a stock dd. So, there's tons of metal shavings in the pan, and in the screen of the pickup tube. I know the oil cooler is junk and I'm just going to loop the lines for now. But will it be the same for the oil filter housing and oil pump/case? Can those get metal shavings in it? And can I tear it apart and clean them out?
     
  2. mechanized

    mechanized Proven Member

    38
    3
    Joined Jul 29, 2017
    linden, Pennsylvania
    in my experience with metal in the oil, it get everywhere so when i had mine torn down after finding that the rod bearing for #2 was destroyed was i had the machine shop hot tank everything, blow it out and tank it again. the hope is that the little bit that didnt come out when it was there after they did their job is that the little bit that may be left the filter will catch. when you fire it back up when done you may want to change oil a couple times in the first 500-1000 miles which is my plan. hope that helps
     

    Street Build 275  1

    1999 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  3. dustyboner

    dustyboner DSM Wiseman

    952
    381
    Joined Mar 13, 2016
    abq, New Mexico
    your front case/ oil pump is most likely trashed, here is what it has in the service manual if you wanna check it.


    upload_2018-2-25_3-42-41.png

    0-91EngineChassisBody_cr.jpg 00001122122.JPG
     
    SAKJR likes this.
  4. SAKJR

    SAKJR Probationary Member

    13
    7
    Joined Nov 2, 2015
    Tulsa, Oklahoma
    If you have metal in the oil, all the oil feed areas are going to have to be flushed out ( block, head, turbo, etc.). Your oil pump should be inspected/replaced. If you don’t clean all the oil passages out you run the risk of premature bearing, pump, cam, and lifter failure.
     

    Street Build 469  1

    1997 Mitsubishi Eclipse Spyder GST
    fwd · automatic · 2G DSM
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  5. pauleyman

    pauleyman DSM Wiseman

    5,080
    957
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    You said the cooler is trashed but is the filter housing? Meaning you have an external oil cooler? If so clean that filter housing out. The cooler itself will probably be trash. If you have a water/oil filter housing trash it and get another one.
     

    Street Build 2K  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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    SAKJR likes this.
  6. motomattx

    motomattx Proven Member

    1,633
    453
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Trash that crank! you shouldnt cut a nitrided crank anyway, and even if its for street use it will still see USE, doesnt matter. Even if it didnt need cut, you still have metal particles up inside of the passages in the crank that you will never get completely out no matter what. The same applies to the lifters, they will be full of metal shavings that can empty into the oil at any time in the future, the valve cover baffles should also be pulled and the valve cover hot tanked to get the debris out of it.

    If you dont you or whoever owns that engine or engine parts in the future will be back here wondering why their engine spun a bearing, it might last a day, it might last a year but eventually it will catch up with it. Always ask yourself this question when pondering something like this: "would I use any of these parts in an airplane engine that I am going to be flying on?" if your answer is no then dont bother, toss them.
     

    Drag Race Build 2K  16

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  7. AndrewC

    AndrewC Proven Member

    59
    2
    Joined Nov 6, 2017
    Portland, Oregon
    Thanks for the help everyone. I know I'm taking a risk with the crank. Except my crank isn't nitrided, mine is only hardened. And I'm completely rebuilding the engine and boring out the cylinders. So everything is going to get treated. I also had to buy a new head for it because the old one dropped a valve. When I get home I'm gonna take the pump and ofh apart and see if I can find anything. I've seen that a lot of people have grinded cranks and have had no issues. If I learn the hard way I learn the hard way.
     
  8. dustyboner

    dustyboner DSM Wiseman

    952
    381
    Joined Mar 13, 2016
    abq, New Mexico
    the 1.8L crank can be ground, thats why they have the rework dimension in the FSM
    upload_2018-2-25_13-52-28.png
    --------------------------------------------------------------------------------

    and for the DOHC it says:
    upload_2018-2-25_13-46-54.png
    and gives no rework specs.

    It'll be cheaper in the long run to just replace the crank.

    Every time i have found a ground 4g63 crank in an engine, they are always in rough shape. I can't say for sure it was because the crank was ground but Mitsubishi has to have a good reason for nitriding them and specifying no to rework them.

    DSC03854.JPG DSC03856_cr.jpg
     

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    Last edited: Feb 25, 2018
  9. motomattx

    motomattx Proven Member

    1,633
    453
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Your crank is nitrided/hard coated from the factory.
     

    Drag Race Build 2K  16

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  10. AndrewC

    AndrewC Proven Member

    59
    2
    Joined Nov 6, 2017
    Portland, Oregon
    I've seen only 2 people that could have had a failure due to a ground crank. But other than that I see people that who have done it and made good power. And other people that just say "Don't do it" so I'm going to take the chance because I'm not spending $600 on a new crank when I've seen people have good luck with it. Yes, the motor is going to be fully built internals but if it blows it blows. I'd rather have the experience than just people saying don't do it just because Mitsubishi says not to when people have done it.
     
  11. motomattx

    motomattx Proven Member

    1,633
    453
    Joined Dec 9, 2010
    wampum, Pennsylvania
    You dont need to spend money on a new crank, a good used one with no damage will work fine for under $100.
     

    Drag Race Build 2K  16

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
    Loading...
  12. AndrewC

    AndrewC Proven Member

    59
    2
    Joined Nov 6, 2017
    Portland, Oregon
    Alright well I'm probably gonna end up getting one now. And good thing I opened and started to do my balance shaft delete because the hole that the shaft goes it and the hole where the gear goes through is completely mangled. And because of that I'm not gonna trust my oil filter housing and get a new one.
     

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