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  1. #1
    Moderator beerdart's Avatar
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    Piston Failure???

    Piston Failure!!!
    ID what went wrong with the pistons????
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  2. #2

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    Left one.....I think it's a fast hot spot from either timing or too hot plug.
    2nd one looks lean again
    3 and 4 are both detonation I say.

  3. #3
    Water Bum Rodneyae's Avatar
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    The first two look like heat and being lean, The second two was deto. need to run some 110 to prevent. Could also be forgin object damage, but I would say it looks more like deto.

    R

  4. #4
    Hey! I made some just like it! the piston didn't fail! I failed to tune correctly!

  5. #5
    Hydrotoys's Avatar
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    Deto, Deto, Ring Failure, Dunno why the last one cracked.

  6. #6

    piston failure

    i'm with redline on the fist two pistons but #3 IS THE PRODUCT of thrust washer and bearing failure i see that about 20 times a summer and #4 is a hydrolock i also see this about 10 times through the summer !!! #3 is something we see on most 92 650's it's a common picture #4 is common when you give kids a rope and a tube he will eventually get the rope in the driveshaft flip the boat over fill it with water and then hydrolock it and when they bring the boat to our shop they tell me they don't know how this happened (the seat by the way is about 70lbs) we never flipped this boat over !!!

  7. #7
    Moderator beerdart's Avatar
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  8. #8
    Water Bum Rodneyae's Avatar
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    Prebent rods for a custom V engine. Gotta love that. Rember when you wash out your hull do not put the water hose down the carbs.

  9. #9
    Moderator beerdart's Avatar
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    It almost looks like a fuel starved NOS failure?? I had a sandrail VW 1835 running NOS and had a fuel starved system and the rod and piston looked similar.
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  10. #10
    Water Bum Rodneyae's Avatar
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    Cool, A friend of mine had a Honda with a JDM B16 swap(160 hp). Then he added a NOS nozle with no additional fuel for it. Well he had it jetted for a 180hp shot. It would run, until one day.... Well there was peices of the piston every where. #3 let go, when we took it apart we found peices in each cyclinder. Apperently it was sooo bad it blew the peices through the intake manifold. Head and block was destroyed. I got some video of it blowing up on the track, I tried to tell him over and over what was going to happen, well he thought it would be ok. Well that was an expensive mistake.

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