LS7 Lifter Preload?
LS7 Lifter Preload? What does everyone shoot for, i've read .030 to .120?? I am at .100 right now and she is noisy! Can't stand it. Should i go up to .125 with my 7.400's or order some new one and go down a bit to say .080 or soo.
I shot for .080 with mine. I think i ended up at about .083 or so. I don't think my valvetrain is noisy. I thought the recommendation was .080 to .100.
I thought the less preload you run the more noise there would be, maybe I'm wront though.
I thought the less preload you run the more noise there would be, maybe I'm wront though.
Thats how i see it too, less would be more noisy. But mine is in between .087 and .100 depends on how i meansure the pushrod checker. With the EO/IC method i come up with 7.262 + preload with the TDC method i get 7.275 + preload. I went with the TDC method and got 7.375 rods which is .100 preload. And she ticks really loud part throttle not to bad at idle but you can hear a slight tick. Got all new valvetrain, just got done putting on LE2 heads, cam package, new lifters, timing chain set, oil pump. It runs like a champ! Just loud and annoying!
Mine is at .060 and is quiet. A lot depends on the cam lobes too.
I believe the entire internal stroke of the lifter plunger is only .200 so you can run into issues with the lifter going solid as well if you go too far.
I believe the entire internal stroke of the lifter plunger is only .200 so you can run into issues with the lifter going solid as well if you go too far.
