Small block push Rods

[71ss454 * (Larry)]

I am having bad luck with motors I bought one it turned out to have a cracked

Block now I got another one and changing the intake and found two bent push rods

One on each side can anyone give me a idea of what would cause the rods to bend and what other damage I might be looking at I have not heard this motor run yet

 

Thanks

[kc8oye]

bent pushrods are usually valve lash too tight and/or over-reving.

[CrazyDavey]

probably what Tim said Larry although it's pretty unusual in a street car. We would have to know more about the motor combo to tell if there might be further damage.....Dave

[71ss454 * (Larry)]

I just bought the motor I know nothing what so ever about it i have not heard it run I was just cleaning

It up with new paint and somehow seen them bent when I took off the intake to clean and paint it was really clean inside oil was decent and it does have roller rockers so I think it was rebuilt

[wallaby]

That's a tricky one. You might be lucky and just have a weak set of pushrods, or it could be something else causing them to bend.

Here is a good page of things to check for:

http://www.lunatipower.com/Tech/Valvetrain/ValveSpringTech.aspx

[zmanabba]

I didn't look at the link Wallaby put up but I am sure this suggestion is in it (I guess I just wanted to post lol). Check to make sure there is enough valve guide clearance for the lift on the cam. David

[Heckeng]

Springs could be binding, piston to valve clearance could be bad. They could just be old crappy pushrods that they threw in there--maybe they didn't even get bent while in your engine--hopefully.