Mangled03gmc

iTrader: (95)

I have a slight lifter tap I believe, hardly noticeable, to the normal folk wouldn't be.. I am going to try some oil treatment to see if it will stop it, pull the covers and go over the valves again.. If it doesn't stop it I might consider new lifters.. What if any is the beni of running the 7 lifters???

Thanks

budhayes3

iTrader: (19)

From what I've read here, the LS7 lifters are actually the new stock replacements. One thing to consider though, hirdlej posted some pics of the LS7 lifters along side his original stockers, and the lifter cups on the LS7's aren't as deep as the originals...so I'm not sure if a shorter pushrod will be necessary. But it's my understanding that the LS7's are now the GM standard stock replacement.

Here's a link to an older thread of mine with pics of the LS7's along side some stockers:

https://www.performancetrucks.net/fo...hlight=preload

Mangled03gmc

iTrader: (95)

Thanks Billy.. I have also heard that you might have to run a shorter PR.. I will have to check in to it. If that be the case, the tap doesn't go away, I will try to find some old stock ls lifters.. My fingers are crossed for a loose rocker, or the additive stops it..

Derek @ EDO

iTrader: (73)

LS7 to the left.

Most guys running a 7.4 need to switch to a 7.350 to get the right preload.
LS7 lifters seem to operate best between a .06 and .09 preload, buying one of those pushrod length deals would be the best bet.

turbosilvi

thanks for the info. i can use it!

1FastBrick

iTrader: (17)

Try Switch oils! I Went to Valvoline Max Life 10-30W in mine and it's been alot quiter ever since. It also stoped burning Oil.