underated98Z

iTrader: (3)

Can you shim the stock LS1 Valve springs. What I am doing is changin my valve springs tomorrow and I was wondering if I could shim the new springs to make up for the wear that has taking place from my valves coming up and hitting the head when opening and closing so I can get it close to brand new as possible.

Another_User

I am sure you can shim it, but I doubt that would be the proper way to do it. But I am not a machinist either.

DaleMX

iTrader: (4)

I don’t follow your reasoning. The only reason the shim the valve springs is to increase the closed and open pressure on them a bit. You have to be careful if your running a cam with high lift as coil bind may be a problem.

What type of springs are you installing? If you’re replacing them because you think that the seats are worn then your wasting your time. The seats are hardened steel and won’t wear much at all.

Another_User

My reasoning was that shims are not for making up for wear, they are for adjusting spring tension. If there is wear that needs "adjustment", then the heads should be machined. I think.

highgear

If you are worried about the stock springs loosing tension due to high mileage; just replace them with Z06 springs.

kenkaru

Brand new Z06 springs are only about 90 smackers shipped from SDPC.