I replaced the lifters in my wifes Denali, and the tick is still there. I used new ls7 lifters, had them soak in oil overnight, followed directions to a tee... Could I have gotten a bad lifter or some other problem?

 

What kinda preload you running?

 

Ummmmmm.. I tightened rockers down 9 then 18 then 22 ft lbs. Spun motor over ny hand and rechecked and all were good at 22ft lbs

 

How were the bearings in the rockers? How did the old lifter rollers look... Is it a tick or an exhaust leak? Do you have a mechanics stethoscope?

 

Didn't really inspect the rockers but they all had the same amount of movement.

Some of old lifters had slight cupping where the tick was.

Sounds like a tick and not a leak, gets a little quieter when warmed up. Don't see or feel any leaks.

No i do not have a scope

 

A small exhaust leak out the manifolds can sound like a tick.

 

I have an exhaust leak when its cold that sounds like a lifter, but once it warms up it goes away, its at the y-pipe seal... Truck has had it, i will fix it and it comes right back.... Hell ive even replaced the exhaust and still had it... Engine mounts are the next victim, along with a set of longtubes.... Going to eliminate the issue all together and be done with it...

 

ive checked the manifolds and theyre good, new oem gaskets. dont feel or see or hear anything coming from them or any part of exhasut

 

Its possible you may have a bad lifter, a weakspring, or a bad lobe on the cam, is it the factory cam?

 

Small cam and pac 1218 springs.