VB LS Motor Experts..Need your help.

[Datawiz]

OK, so I pulled both valve covers, very easy to do. An inspection of both sides did not reveal any needle bearing cap failures or valve lash caps being torn up, both of which are documented issues on the LS7 motor.

What I did find was a large number of rocker arms that are easily moved from left to right, as shown in the video. On the passenger side, it's 6 of 8 move and the driver's side is 5 of 8.

What should I know? Should I just go ahead and replace all 16 rockers while I have it open?

TIA

20130828183258 - YouTube

[xXBUDXx]

How do the springs look?

Pull one from the loose rockers.

[mrvette]

Humpfgh.....I have RR's like very similar on my old engine...and mine move a little side to side, always have, but my engine is a basic L98,

tell you what, join up and post on VetteMOD.com wait a day or so, they are the smartest bunch of techs on the net, far as I know, they not a large group, but give the best advice....no mouth running.....

I read there FAR more than I post, just for the education....

[Y2Kvert4me]

That is normal. The ones you indicated being tight are under spring tension (valves open), so they won't be able to move like that.

[Datawiz]

Originally Posted by Y2Kvert4me

That is normal. The ones you indicated being tight are under spring tension (valves open), so they won't be able to move like that.

Thanks! That makes sense.

Happy and Sad that everything looks OK. It means I have not found the source of the metal in my oil pan.

[mrvette]

Originally Posted by Y2Kvert4me

That is normal. The ones you indicated being tight are under spring tension (valves open), so they won't be able to move like that.

I tend to agree with you......

[CP]

I thought hydraulic lifters keep the rockers tight all the time unless the lifters leak down when the engine is not running.

[mrvette]

Originally Posted by CP

I thought hydraulic lifters keep the rockers tight all the time unless the lifters leak down when the engine is not running.

I would use the term snug, not tight....you know the score, loosen till clicking then 1/4 turn down, another way is to feel the pushrod turning in your fingers, snug down till pushrod cant turn, then another 1/4 turn, this last is with the lifters on the heel of the cam, obviously....

Had the $$$ I would go LS in a nanosecond, but it's too much $ and time/effort for the gains involved, I suspect....