what causes a pushrod to bend actually?
few different of things could cause it, excessive rocker ball or stud wear allows the rocker to slide sideways off the valve stem bending the pushrod. weak valve springs that allows the engine to enter valve float will also cause bent pushrods.
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Originally Posted by 1slowls1
weak valve springs that allows the engine to enter valve float will also cause bent pushrods.
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I have ticking comming from whatt seems like under the car. I pulled all my pushrods and checked over them and they all "seemed" fine. I didnt roll them I just looked at them and they looked straight. Could I have missed a very minor bend and would that minor bend still cause a loud ticking??
Originally Posted by nokeman
I have ticking comming from whatt seems like under the car. I pulled all my pushrods and checked over them and they all "seemed" fine. I didnt roll them I just looked at them and they looked straight. Could I have missed a very minor bend and would that minor bend still cause a loud ticking??
I fugured after checking everything it was an exhaust leak. I dont think its piston slap cause its so damn loud. If I have the wondows down and I drive next to another car or a curb or building, I can hear it over everything else thats going on...its rediculus. Can piston slap be that loud??
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Joined: Aug 2004
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From: Buffalo, N.Y.
Mechanical over-rev (missed shift...usually trying for that nano-second 2-3 shift, and wind up stuffing back into 1st) will virtually guarantee a bent/broken pushrod. The PCM cannot control (pull fuel from cylinders) a mechanically-induced over-rev. The rev-limiter will work only if you're increasing revs via the throttle.
If you have an OEM valvetrain, the springs aren't strong enough to keep the lifters in contact with the cam lobes. Then you get valve float, and if you've over-reved at a high enough RPM, you'll probably smack your valves closed with your pistons. Then valvetrain parts wind up everywhere but where they're supposed to be.
Not to change the subject too much, I've seen the reverse lock-out fail on a missed 4-5 shift. That's a noise that'll make your sphincter pucker.....
If you have an OEM valvetrain, the springs aren't strong enough to keep the lifters in contact with the cam lobes. Then you get valve float, and if you've over-reved at a high enough RPM, you'll probably smack your valves closed with your pistons. Then valvetrain parts wind up everywhere but where they're supposed to be.
Not to change the subject too much, I've seen the reverse lock-out fail on a missed 4-5 shift. That's a noise that'll make your sphincter pucker.....
