my car has 202 intake valves and the heads were milled slightly to clean them up, think their is a possibilty the valves could hit the piston? I put the engine all together and tightened down the rocker arms and turned the engine over a few times and i bent a bunch of the pushrods. not sure if the spring is bottoming out and the rockers were on too tight and thats why they bent, or if they are hitting the pistons. Car has 1.6 rockers also

 

what springs you running?

 

What pistons are you running? Are they dished? Did you adjust the rocker arms properly? If you were 180 degrees off when adjusting the rocker arms then they would bend pushrods, are they LT4 rocker arms or aftermarket?

 

The valve springs are the comp cams extreme whatever. The springs are pretty beefy. They have the spring inside the spring. As far as pistons, they are stock , they have minor valve releifs in them I believe. The rocker arms are 1.6 ratio that came in the lt4 hot cam kit. I don't see how these pushrods got bent this bad, it doenst make any sense.

 

are the pushrods the right length?

 

are they lt4 hotcam springs?? sounds like a spring bind.

 

The springs are the correct springs that comp cams says to use with the cam, the pushrods were stock pushrods. I ordered a new set of comp cam ones, whichever ones comp cams recomended and I will re adjust the valve lash and see what happens.

 

are the springs at the right installed height?

 

the pushrods that bent, were all exhaust ones. This most likely means they are hitting the piston. These springs called for some kind of machining. I set the spring in the head and their were no fitting issues and the crane springs that some people use that say no machining, are a bigger diameter then these. Im not sure why only the exhaust would have clearance problems.