combs_425

iTrader: (3)

I bought I set of cnc 243s that have the vale spring seats machined for dual springs. I have already installed PAC 1518s and have been running the car for a few days now. I have a little valve train noise but nothing crazy. Is this bad? Should I change to a dual spring?

mark21742

As long as your installed spring height and pressure is right you should be fine. What lifters and preload are you running?

combs_425

iTrader: (3)

I have ls7 lifters. How do I test for preload

garygnu

go to ls1howto.com and read about installing rockers and setting preload.

mark21742

It's pretty easy, but long to explain... like Gary said they explain it pretty good

combs_425

iTrader: (3)

Thanks for the help