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Rod Bearing

Discussion in 'Civic and CRX - EF' started by 1sikef, Aug 18, 2008.

  1. 1sikef

    1sikef New Member

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    How Hard Is It To Replace A Spun Rod Bearing, Is It Something I Could Attempt With Out A Machine Shop, I Mean Allot Of Experience With Motors But Nothing This In Dept.
     
    Last edited: Aug 18, 2008
  2. phyregod

    phyregod !!YTINASNI

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    Nope, spinning a rod bearing messes up the rod or the crank shaft, usually causing scarring/scratches/burn marks. You could take it apart and visually inspect it, but if you know its spun, its more than likely done its damage.
     
  3. BoostedHatch

    BoostedHatch get tha fuck out!

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    you will have to replace the crank shaft and need new rod bearings.
     
  4. caboose

    caboose USDM to the bone

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    Sometimes... nay... MOST of the time this is the case. Only way to know what needs to be done is to dive into it.

    It is possible that you could get away with just new bearings. If you want drop the pan, and knock off that rod from the crank. Mic it and check the surface. Also check the rod. I would talk to a engine machine shop to know what exactly to look for. If everything is ok, you could slap on a new bearing and be done without pulling the head.

    But like I said, that is almost never the case, usually because something caused the bearing to spin in the first place. If the crank is damaged, just have it machined down 10 or 20 thou, and install the corresponding bearings. Rods can be checked to and repaired/replaced as needed.
     
  5. caboose

    caboose USDM to the bone

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    And while your at it, you might as well have all the other stuff done too...
     
  6. phyregod

    phyregod !!YTINASNI

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    You don't necessarily have to replace the crank shaft. A machine shop can fix minor damage.
     
  7. caboose

    caboose USDM to the bone

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    I always figured that depended on how exactly the bearing spun. I've never had one, but I assumed that the rod might not always be damaged.
     
  8. 1sikef

    1sikef New Member

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    ok its my friends old y7 block and he ran it low on oil, so can i get d16a1 integra DOHC crank and rod+pistons, ive heard something about it and it will give me more compression and power, if not what all d-series engine can i get a Crank/Rod/Pistons from that will go in with no problem
     
  9. caboose

    caboose USDM to the bone

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    I just did some poking around, and it looks like depending on how bad it spun, it is possible to get away without replacing the rod.
     
  10. caboose

    caboose USDM to the bone

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    Why not just have yours repaired instead of replacing with all of the same stuff
     
  11. 1sikef

    1sikef New Member

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    true yeah i got some other y7 rods from a block i tore down awhile back that had low ass mile so can i just use one of those rods, and just get the journal bore back to spec's and then replace the bearing. BY THE WAY DOES ANYONE KNOW THE JOURNAL BORE SPEC'S FOR Y7'S
     
  12. caboose

    caboose USDM to the bone

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    They would have them in a Repair Manual. If they are out of spec, you can't "bring" them back into spec... you have to have the crank turned down smaller and install bearings for that size.
     
  13. 1sikef

    1sikef New Member

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    ok ill try to find the spec, so where can i get bearing that are semi-cheap and do i just get standard bearings
     
  14. caboose

    caboose USDM to the bone

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    Well you need to know if the crank is damaged. They make std, and .010, .020, and so on undersized. I think you can get up to .040, but you would have to check. STD is obviously for ungrounded cranks, but if you need to have your turned, you will need at least .010.
     
  15. caboose

    caboose USDM to the bone

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  16. caboose

    caboose USDM to the bone

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    I don't understand the issue with turning the crank and installing those bearings
     
  17. caboose

    caboose USDM to the bone

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    eh...

    So what, used std. ACL bearings on mine, runs fine. Every other car out there does it the other way. If he spun a bearing then he is probably going have the crank turned anyways, so he might as well just install at least 1 new .010 bearing, or get them all turned and get all .010 bearings.
     
  18. caboose

    caboose USDM to the bone

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    Oh, and I talked to my machinist about installing std acl sizes over the honda OEM stuff, and he said that it doesn't make a difference. He said that it wasn't even really nessisary to plastigauge either if I'm just swaping out the OEM honda for STD rod and crank without turning.
     
  19. caboose

    caboose USDM to the bone

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    .0001" is nothing. I seriously doubt that you will have any issues doing the way I suggested. Every SB and BB chevy does it that way... and small block chevys run forever.

    and you're right, these aren't Chevys.
    [​IMG]
     
  20. caboose

    caboose USDM to the bone

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    If you give the shop your rods and bearings, they can just machine the crank the based on the exact size of each bearing, and then you can get your fit that way too.


    Oh, and doing a burnout with a front wheel drive is like banging your sister...

    It's not cool whether your doing it or just watching it.
     
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