bent pushrod
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New User
Joined: Oct 2005
Posts: 9
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From: Cordoba, Argentina
bent pushrod
I drive a 1995 Flareside with a 5.0 EFI engine. After hearing a cleacking noise and discovering (1000 Km away from home) that I was running on 7 cylinders, I drove (carefully !!!) back home and after checking spark plugs and cables, I took off the valve cover and found one "loose" rocker. I took it off and found that its pushrod was bent. Can any one tell me how to investigate the cause for the bent pushrod ?. What should I do next ?.
Thanks for any help !<!-- / message -->
Thanks for any help !<!-- / message -->
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Elder User
Joined: Aug 2002
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From: CA
A bent pushrod is almost always caused by some restriction in the valvetrain, such as a badly sticking valve, a lifter stuck in pumped up position, a valve hitting a piston, too much play causing the pushrod to wack the rocker, and so on. Causes could include dirt in the oil or an engine running too hot.
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New User
Joined: Oct 2005
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From: Cordoba, Argentina
Thanks Polkat. I found out that the spring for the same valve was broken. I suppose it was metal fatigue that caused the whole problem. I have changed the spring, straightened the push rod and am now up and running. Thanks for your help.
Elder User
Joined: Aug 2002
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From: CA
Just another thought....depending on the amount of bend, once a pushrod is bent, and then bent back straight, it may tend to suffer a fatigue which will make in more succeptable to bending again in the future. If you get the chance, you may want to replace that rod.
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