New conrod shape - just add water

Discussion in 'Technical' started by Chev28, Oct 19, 2015.

  1. Chev28

    Chev28 Member

    The result of hydrolocking...



    Still ran OK - just noisy
  2. AndyMac

    AndyMac Better than you

    Just be happy you got it out in time...otherwise you'd be shopping for a new block as well.

  3. Madcow

    Madcow Active Member

    heat it up and straighten it up then refit. She'll be right.
  4. Chev28

    Chev28 Member

    I wonder if I can straighten it in the benchvice with the torch and mallet?

    When I was younger, I wondered if offset conrods would actually be a performance mod as they might theoretically build revs quicker. Dumb ideas you get sometimes.
  5. AndyMac

    AndyMac Better than you

  6. WazTTed

    WazTTed Grease Monkey

    caught in a flood?
  7. ryzan

    ryzan Black Mesa? Fat chance...

  8. SuperZ

    SuperZ Resident Z lunatic

    I can't imagine the bore faired much better.................
  9. Chev28

    Chev28 Member

    The bore is fine. No markings.

    Once it happened, it only drove another 5km before I parked it in the garage and swapped the engine.
  10. Harleynissan

    Harleynissan AussieSpeedingFines

    So were the revs low with it locked up?
  11. Chev28

    Chev28 Member

    Maybe hydrolocked is the wrong term. It didn't actually stop like when you cross a river.

    It was idling when it inducted some water. The engine didn't stop but faltered a bit and then started making a new noise. I would not have picked that the conrod was bent like it was.

    Makes you think about driving in heavy rain with exposed pod filters.


    and I thought water injection was a performance thing


  13. Madcow

    Madcow Active Member

    I know bent rods are from water. But how much water does it need to take in before the rod will bend?

    It wouldnt be easy for water to get from the pod into the cylinder. Does the water build up in the plenum then goes in all at once causing enough for a bent?
  14. The Deacon

    The Deacon The Deacon

    No you are getting confused between Beer drunk using a yard glass!
  15. SuperZ

    SuperZ Resident Z lunatic

    Unlikely to hydro lock from rain itself ;)

    Different story if you "induct" water ........... :confused:

    Your more likely to quench steel rings with rain or by using water injection over a long term period with stock rings (heated steel becomes brittle when quenched with water)

    Assuming this is an NA - (otherwise the turbo's won't be happy- lol)
    Water will travel into the plenum and pool in the valve seats, the valve opens and you get a sudden rush of 50ml or more of water. The piston then hits the water when the valves close and the conrod generally buckles

    How much head space is at TDC, less than a there's not much room for compression once that void begins filling with water.

    Say anything after 30ml in one cylinder and your looking at trouble with compression ratios alone.

    Avoid inducting water of large amounts into your cylinders ............:rolleyes2:

    Nice pics......:cool:....a lot of force suddenly went into making that conrod....the crank journal would have to be a bit thinner now :rofl:

  16. SrAfciGeR

    SrAfciGeR Member

    How did that much water got in to the intake when engine was idling?

    Were you actually crossing a river when that happened?
  17. WazTTed

    WazTTed Grease Monkey

    Very interesting how Did it happen ? Driving through giant River do you have pics of your filter setup ? Is your z slammed on the ground ?
  18. Chev28

    Chev28 Member

    Nothing that heroic.

    Just an accident while working under the bonnet.

    Start with a small job of replacing injector connectors, end up replacing engine!
  19. AndyMac

    AndyMac Better than you

    washer bottle hose...

    How I bent and then subsequently snapped my rod.
  20. tassuperkart

    tassuperkart Its a lie I tell you!



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