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I think i have a bent pushrod!

This is a discussion on I think i have a bent pushrod! within the General Help forums, part of the LSx Technical Help Section category; My car has 98,000 on it and the other day it started making a tapping noise from the engine. I ...

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    Member camaroluvr447's Avatar
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    I think i have a bent pushrod!

    My car has 98,000 on it and the other day it started making a tapping noise from the engine. I had run it pretty hard the day before but never went above 6000 rpm. I think it may be a bent push rod. Am I still able to drive the car or do I have to park it? and how much does that impact performance? Thanks.

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by camaroluvr447 View Post
    My car has 98,000 on it and the other day it started making a tapping noise from the engine. I had run it pretty hard the day before but never went above 6000 rpm. I think it may be a bent push rod. Am I still able to drive the car or do I have to park it? and how much does that impact performance? Thanks.
    Could be...
    Ticking Lifter? (common)
    Piston Slap? (common)
    Rod Bearing? (something to worry about)
    Or maybe a pushrod

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    Member c5z28's Avatar
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    post a vid that may help-you should not be driving on a bent pushrod.

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    Definatley dotn drive it, its most likely something in the valvetrain, cracked valve spring is a possiblilty.

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by c5z28 View Post
    post a vid that may help-you should not be driving on a bent pushrod.

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    Member camaroluvr447's Avatar
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    tried for a video but the noise was too faint to hear, pretty sure i bent only one, i drove it the other day and the car drives fine, no loss of power or anything, no check engine light, just that annoying little tick tick tick

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by camaroluvr447 View Post
    tried for a video but the noise was too faint to hear, pretty sure i bent only one, i drove it the other day and the car drives fine, no loss of power or anything, no check engine light, just that annoying little tick tick tick
    Sure its not a lifter?

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    Firebird Encyclopedia 9T8W66's Avatar
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    Just need to add my $.02 here
    I drove on 3 bent pushrods for over 3 yrs manly because the tick is so faint that you barely notice it. One finally broke and that was when I found the other bent ones. I also drove on that broke one for a month till Iwas able to swap them out.

    BTW mine were bent because of a blown shift meaning the engine went above 7000 for an instant and floated the valves.

    After swapping then out I have had zero issues and that was almost 5 years ago and 40k miles.
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    Member camaroluvr447's Avatar
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    thanks 9t8w66 i have wondered about that. i have to drive it today, and i was worried that i might ruin the engine ( i just bought my car and i would prob cry if that happened lol ) but the ticking is from one cylinder is i cant even capture the sound on a video. I also missed a shift, from 3rd to 2nd going about 80-85 mph.... scared the heck out of me! i plan on fixing them 2marrow.

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    Retired NOT tired SteveC's Avatar
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    Check if your oil pressure is low or normal.

    If it is constantly running low, you have a bad lifter.

    A bad lifter will produce a ticking noise which accelerates with trottle, a rod would produce a louder banging noise.

    SteveC
    Last edited by SteveC; 10-01-2009 at 06:22 AM.

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    Senior Member redbird555's Avatar
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    Sorry dont mean to hijack the thread but I have pretty much the same question. Yesterday I let my friend drive my car...(Alex if you read this it was joel) Anyway its an auto, he dropped it to first at 30 and got on it he hit the rev limiter like twice before he let off cuz he didnt know that you have to shift it when the shifters on 1??????? Anyway the car doesnt make any abnormal noises besides piston slap after the first 15min I used a stethiscope and couldnt hear anything abnormal in the valve covers. I think I'm good/hope. Is a bent pushrod loud when the engines hot too
    Dan-

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    Firebird Encyclopedia 9T8W66's Avatar
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    Hitting the rev limiter with an automatic is not going to float the valves (unless the springs are real bad and it floats below 6000 rpm).

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    Member camaroluvr447's Avatar
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    hey thanks guys the info was really helpful. i replaced the pushrod today and the ticking is gone. It was bent pretty bad.

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    Firebird Encyclopedia 9T8W66's Avatar
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    Quote Originally Posted by camaroluvr447 View Post
    hey thanks guys the info was really helpful. i replaced the pushrod today and the ticking is gone. It was bent pretty bad.
    Did you replace them all ? because it usually isn't just one.

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    That's a relatively easy job, isnt it? Just remove the valve covers and take off the rockers with (hex socket, can't remember what size?) and the pushrods come right out?

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by ls1fan74 View Post
    That's a relatively easy job, isnt it? Just remove the valve covers and take off the rockers with (hex socket, can't remember what size?) and the pushrods come right out?
    Very much so.
    6 point 8mm if I recall.

    I would check ALL of them, replace any bent ones with a stocker.
    Piece of mind....that takes 45-60 minutes.

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    Quote Originally Posted by Mr. Luos View Post
    Very much so.
    6 point 8mm if I recall.

    I would check ALL of them, replace any bent ones with a stocker.
    Piece of mind....that takes 45-60 minutes.
    Nice. I'm trying to learn more about the ls1, especially working on it- (basic stuff at least) 04 GTO 69k miles I may swap the pushrods some weekend when I've got nothin goin on just to do it

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    i know i have a bent push rod. so i dont race it any more. i reckon as long as i keep it under 3k ill be fine. it ticks at all times, started after i missed 3rd.

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    I'm afraid I have bent one also. I'm putting it away for the winter this weekend and I'm hoping it will fix itself.hahaha

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    Veteran 0rion's Avatar
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    Quote Originally Posted by WalterS6 View Post
    I'm afraid I have bent one also. I'm putting it away for the winter this weekend and I'm hoping it will fix itself.hahaha
    no need...pushrods are easier to swap than the spark plugs.

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