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Snapped conrod

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by That Deaf Guy, Jan 27, 2020.

  1. That Deaf Guy

    That Deaf Guy New Member

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    A1F77ADC-BEE9-4D62-B827-12980B3DD3EC.jpeg 904BB302-5B57-42D8-8D15-2177C4BED27D.jpeg A975F4E3-F2E0-46F4-B659-1BC99D856B68.jpeg Any idea how the hell this happened?
     
  2. rambunctious

    rambunctious Well-Known Member

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    Metal fatigue.
     
  3. immortality

    immortality No more smoky bacon :( Staff Member

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    Piston looks like it's lost part of the crown/top ring land. It got hot, rings butted up and grabbed the bore, piston got stuck and the rod paid the price.

    Turbo, supercharger or nitrous?
     
  4. That Deaf Guy

    That Deaf Guy New Member

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    Stock internals. 240000 Kay’s, has had a misfire, flat spot and backfiring for 6 months. Then the last few weeks after replacing nearly everything, one piston gave way while disconnecting injectors one by one
     
  5. immortality

    immortality No more smoky bacon :( Staff Member

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    Really need to get a better look at that piston, but my bet is the piston got stuck in the bore and the rod let go.
     
  6. Deuce

    Deuce Super Stock

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    Just to confirm, this is an LS1?
     
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  7. That Deaf Guy

    That Deaf Guy New Member

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    Yes it is VX SS
     
  8. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Maybe the big end bearing locked up or the roller bearing on the conrod is stuffed.
     
  9. Deuce

    Deuce Super Stock

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    Roller bearing on the conrod?
     
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  10. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Yeah my bad pin bush.. Sorry.
     
  11. losh1971

    losh1971 Well-Known Member

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    One of my rides has a roller big end and small end. :):)
     
  12. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Please tell us more, what ride?
     
  13. gtrboyy

    gtrboyy Well-Known Member

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    My guess if you say it's had a miss or backfire for 6 months it's either smashed up conrod bearing of problematic cylinder out of shape or sound was rod knock untill it finally let go.

    Ls1 make all kinds of noise around 200k mark.
     
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  14. losh1971

    losh1971 Well-Known Member

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    Above
     
  15. That Deaf Guy

    That Deaf Guy New Member

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    The cause of the problem is faulty fuel injector. Second motor has seized only by trying to start. It hardly fired up. When we unplug the fuel injectors, leaving them plugged into the fuel rail. Turn the ignition to on and one of the injectors squirt a never ending stream of fuel. Anyway, the engine hydralocked. Now round 3 with new injectors.
     
  16. 07GTS

    07GTS Well-Known Member

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    guess i was lucky i had injector problems with a camshaft so i had more fuel getting pushed out exhaust/intake then kept in cylinder, mine were 2000cc and then were jamming full open at cranking, i could then unplug injectors and start engine and it ran for 15 sec on the fuel dumped in...
     

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