Scooter70

iTrader: (1)

Should the rockers be slightly loose when the cam isn't pushing the pushrod on that particular valve? I'm getting some noise and just want to make sure that everything's ok on my setup.

I've got the Thunder 224/224 kit with the comp springs and Thunder pushrods.

Thanks,
Matt

Grimes

iTrader: (3)

Pretty sure there should be no slack (some pre-load), I'd imagine that's why you have noise. Do you have shorter pushrods than normal, or did you shim your rocker arms?

Scooter70

iTrader: (1)

I have the pushrods that came with the Thunder cam kit. I should probably ask Thunder directly.

-Matt

kenkaru

Mine slide side to side a little but that's it. There shouldn't be any play on the rocking axis I don't think.

Scooter70

iTrader: (1)

Yeah, that's what they're doing. They are tight in the rocking axis.

-Matt

kenkaru

I'm not an engine building expert but everything I've read says that when valves are closed, you should be able to spin the pushrod with your fingers. It would stand to reason that if you can spin the pushrod, there's no preload so the rockers will be able to slide side to side a little too. Mine do it and I'm not worried about it.

Another_User

Mine slide side to side. I swapped a long block 305 in my old El Camino, and it did the exact same thing. I'm not worried.

BADBOYZ28

iTrader: (228)

Ya mine slide side to side very slightly also....