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rods

Discussion in 'Engine Building' started by Bobby17772, Jan 27, 2010.

  1. Bobby17772

    Bobby17772 New Member

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    I was just tearing apart my block and I was putting everything back together and I noticed that all of the caps on the rods make the number 2, I knew they were supposed to make 1 2 3 4 for each of the cylinders, or is this normal in an ls? if anyone knows that would be great

    thanks
     
  2. Bobby17772

    Bobby17772 New Member

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    anyone?
     
  3. Magana559

    Magana559 The Warden

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    thats a size reference.

    All mine say 3
     
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  4. Bobby17772

    Bobby17772 New Member

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    oh ok, I thought it ment what cylinder it was supposed to go
     
  5. amentstephen

    amentstephen New Member

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    that's used in a graph in the dealer repair manule to see what size bearings to use
     
  6. Magana559

    Magana559 The Warden

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  7. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Nope. The sharpie marks you put on all the parts are what tell you that. You did match everything up to the way it came apart, right? The rod caps have to match the rods they were paired with.
     
  8. Bobby17772

    Bobby17772 New Member

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    that's another thing, the caps were already off when I got the short block so how would I know which one goes where?
     
  9. CAFROG

    CAFROG Honda Minion VIP

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    you wont know. be careful and if you have the funds....do a rebuild of the bottom
     
  10. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Super high powered microscope to look at the break lines at the rod/cap interfaces and then match them up? That's about the only way.
     
  11. Bobby17772

    Bobby17772 New Member

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    how would I do that? just new rods? because i already planed on getting new rings and all new bearings...well rod bearings
     
  12. caboose

    caboose USDM to the bone

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    take them to an auto machine shop. they will cut down the caps and remachine the big end. it's called a rod recon. i think it cost me $20 to do 4. just make sure that you bring the rod bolts and bearings that you are going to use.
     
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  13. Bobby17772

    Bobby17772 New Member

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    alright thanks man! I'll get right on that
     
  14. Bobby17772

    Bobby17772 New Member

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    just out of curiosity, what's the worst that could happen if I put the wrong cap on the rod if I didn't get it machined?
     
  15. caboose

    caboose USDM to the bone

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    since the holes are machined when the rod is bolted together the hole is perfectly round and there is no mismatch between the rod and the cap. If you switch them, there might me some misalignment/our of roundness. This would cause your bearing to be mis aligned/not round either. What would probably happen would be binding of the bearings/rods to the crank, exessive bearing wear, and therefore more friction. This could cause you to spin a rod bearing, or worst case throw a rod through the block.
     
  16. Bobby17772

    Bobby17772 New Member

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    so should I different sized bearings or just the stock sized ones? because I see stock ones and 25mm undersize, what ones should I get? and would I need to get my crank machined too or is that fine how it is
     
  17. caboose

    caboose USDM to the bone

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    i've been told that you shouldn't machine a honda crank because it's plated.. thefore, stick with stock sizes. Most people would tell you to stick with oem hondas because of the fit. I know that there are several different stock sizes from honda because of the tight tolerances. They are color coated.

    Someone else could probably help you out more with oem honda bearing sizes, i've never bought them before. If your crank hasn't worn much, you probably could just replace them with the same sizes that were already there.
     
  18. Bobby17772

    Bobby17772 New Member

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    alright because I was looking on summit and there are h and p series bearings and honestly don't no the difference between them
     
  19. Magana559

    Magana559 The Warden

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    You have to measure the crank, Then you have to look at the number on your block. Then you figure what bearing you need by figuring what clearance you want to run. Place the right bearings in, Then plastiguage em and se if thats the correct clearance you want to run.
     
  20. 4Door89

    4Door89 New Member

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    in all honesty, if you end up having the rods reconditioned, i would bring your crank and have them polish it, and have them mic everything and give you a set of bearings for what they did. (or tell you what size)

    they make bearings thicker on the crank side, and thicker on the rod side as well, all depends on what you end up doing.
     
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