linksvu

I am replacing a blown head gasket on my '98 4.0l and was hand-testing the rockers... how much is too much play? almost half of them would shift very slightly from side-to-side, but none of them would move up and down. Most of the push rods would spin freely too.

I'm just not familiar enough to know if they should be solid as a rock or if a little side movement is normal/acceptable.

What are your thoughts on how much movement good rockers should have?

(I tried to upload a short video of them but the site wouldn't let me.)

linksvu

Any thoughts on how much play is normal on these rocker arms?

Garrett S.

That sounds normal to me. I have had many engines apart and the rockers that are not currently under load always wiggle a little.

firebane

Rockers have a torque spec. I think its like 21ft/lbs

dave1123

Any valve that's on a cam lobe that's off it's base circle should be tight enough so that you can't move the rocker...unless the lifter has bled down. You're talking about side-to-side movement, right? It should be about 1/2 of them if the engine was recently shut down.

linksvu

Correct; the movement was side-to-side and it had been shut down for some time. What I'm reading in these replies is this play sounds normal. Which is good. I was hoping not to replace the rockers since I may be re-rings in the cylinders... saving some costs since the head was not replaced but machined and cleaned.

dave1123

When you bolt down the pivots during reassembly, It's best to do them on closed valves, one cylinder at a time. If you crank them down compressing the valve spring, they tend to go offcenter so when it fires up, the rockers won't be centered on the valve stems.

97grand4.0

If you are doing the head gasket you would be crazy not to replace the lifters at the same time. I guarantee they are shot as you will see.