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  1. #1
    Antiguan FZR's Avatar
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    Connecting Rod Advice

    My engine dropped a valve last week destroying the head and center piston, the cylinder was not damaged. Yesterday I broke it down and found the rod and pin to be perfect.
    Should I replace this rod even though it looks perfect?
    I am planning on changing all the rings, rod bearings and crank bearings.
    What do the experts suggest?
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  2. #2
    It got WIFI and touchscreen ! PWCGUY's Avatar
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    Just out of curiousity why did you drop a valve? What RPM were you running and did you install valve train upgrades ? I have heard of a few people this has happen to and was wondering the reason.

    Thanks
    Mike D.

  3. #3
    My paranoia would say yes even though the amount of damage to the piston and head seems minimal. Just the mere fact that even a slight bend in the rod at high rpm's can present a problem. The input from the guys with more experience would be helpful. I had the same thing to happen to me. I had to replace the block because the cylinder sleeve was cracked. Fortunately for you the amount of damage is not that bad. Out of curiousity at what rpm did it drop?
    Here is my bombshell: Pics were taken sometime afterwards
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  4. #4

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    You've gone this far - do it right

  5. #5
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by Antiguan RXP View Post
    My engine dropped a valve last week destroying the head and center piston, the cylinder was not damaged. Yesterday I broke it down and found the rod and pin to be perfect.
    Should I replace this rod even though it looks perfect?
    I am planning on changing all the rings, rod bearings and crank bearings.
    What do the experts suggest?
    For 130 bucks for a new rod i would replace it for sure.

  6. #6
    Kiwi spanner handler
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    if in doubt chuck it out! you will sleep better if you do

  7. #7

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    How can you check to see if a rod has been bent or not?


    Quote Originally Posted by jasonze View Post
    if in doubt chuck it out! you will sleep better if you do

  8. #8

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    When in doubt....

  9. #9
    If i knew,...I wouldn't ask sea-one's Avatar
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    I think it's a buncha bull that BRP engineers after 5yrs of production won't put a better valvetrain in these ski's that turn 8+ grand all day.Just irritates the crap out of me to see these threads.AND the BS parts prices on top of that.Mine had the oiler splash tube break on mine a month ago....$14.95 part cost me over $1000 to repair it myself less the crank machine work on the rod journal

    My .02....sorry,had to vent

  10. #10
    Antiguan FZR's Avatar
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    [quote=PWCGUY;1247827]Just out of curiousity why did you drop a valve? What RPM were you running and did you install valve train upgrades ?

    My Timming chain broke due to washer failure and I rebuilt with new valves ect. I believe the valve broke due to excessive play in the valve guide. I was told not to mess with it if I was not lossing compression. Oh well too late. My RPMs were up around 7000 when it shut down. Some said that the knock sensor will lock off the motor when it detects odd vibrations.

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