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Bent pushrods

This is a discussion on Bent pushrods within the Internal Engine forums, part of the LSx Technical Help Section category; Replacing some parts i had 4 bent pushrods, what could have caused this? they are the stock pushrods...

  1. #1
    Member R_Yates69@Hotmail.com's Avatar
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    Red
    1999 Trans Am

    Bent pushrods

    Replacing some parts i had 4 bent pushrods, what could have caused this? they are the stock pushrods

  2. #2
    Member Sunset T/A's Avatar
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    Sunset Orange
    2002 TransAm

    Do you have a 6 speed manual trans? If so, probably a missed shift, like 2nd to 1st, instead of 2nd to 3rd.

  3. #3
    Visualize°Design°Create SSwt00SS's Avatar
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    '12 Silver SS 1SS
    '00 Black SS #8617

    over-revving causes it (usually from missing a shift). the stock pushrods flex severely (final result is they end up bent) when the engine and valvetrain get over-revved...

  4. #4
    Junior Member routy98z's Avatar
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    Red
    1998 z28

    i have the same problem.. bent pushrods at 113k

  5. #5
    Senior Member Rhinohuey's Avatar
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    Black
    1999 Trans Am

    How do you know when they are bent? Latley, I've had ALOT of noise coming from under the hood. Alot of clicking and tapping. At first I thought it was an exhaust leak, but now I'm not sure.

  6. #6
    Junior Member routy98z's Avatar
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    Red
    1998 z28

    its a very distinct sound.. as soon as u start it up u will hear a loud knocking noise and it doesnt go away it will just get louder as u increase rpm's
    98 Z28 113k A4 160 t-stat, Slp Y-pipe with dual exhaust, MSD 8.5mm Wires,removed ac & condensor for better air flow, removed front plastic grill.

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    Some people know when they bend a pushrod as the car ticks at idle after a blown shift or other severe over rpm situation. If several are bent then it will not be a simple tick.

    I have a complete set of straight ones with 66k on them looking for a good home.

  8. #8
    Junior Member routy98z's Avatar
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    Red
    1998 z28

    how much? is it safe to drive on bent pushrods?

  9. #9
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    Personally I wouldn't want to drive it and especially rev it very high with it clattering. Severely bent rods will rub inside the block and you're not opening the valves properly.

    I don't want much for the oem push-rods. I think $20 + shipping is all they're worth. I think most people would want the molybdenum rods for replacement. That's what I bought when I replaced my heads.

  10. #10
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    I found that when I replaced my cam and valvetrain that I had 4 that were slightly bent and I have an auto so it can happen to A4's as well.
    My Toy 00 Z28 1SC A4 - MS3 cam with supporting valvetrain, Milled LS6 heads, LS7 lifters, , ARP rod and mains, All free mods, pacesetters, True duals, moser 9 with 4.11's and Detroit Locker, Vig 3600 tuned, tubular SFC,adj PHR, LCA, adj TA, PHR reloc, LCA reloc. all with poly bushings, ZR1's and Nitto DR's (315).

    My other toy 05 GTO LS2 M6- Comp XR269HR cam, 918's, hardened pushrods, Dart Pro 1's, pacesetters, X-pipe, flowmaster 1 chambers, TSP oil pump, Tick master cylinder. Pedders RR bushings, end links, SB bushings, tie rods and strut mounts, total performance poly F&R bushings. Polk DVC 12", Infinity Kappa 6.5 component and 6x9's with corresponding amps.

    Her toy 77 F100-6.6/c6. All original (for now)

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