Congrats on getting it running, you been working on this for a long time

Read the posts on this page. Easy way to get a good estimate of what your preload is, based on number of bolt turns from zero lash. You should shoot for .080-.100

https://ls1tech.com/forums/showthrea...lifter+preload

 

Im sick of working on this thing, what gets me is the motor was a running motor when I got it so I can't help but think that this is just it and its going to sound like this.

 

Believe me, im so tired of working on my truck. I have done more work than i ever want to do again BUT i wouldnt just settle and say, "its gonna make racket so oh well." Investigate. What springs are you using? Did you have any head milling or head work done? What is your pushrod length? Its a PITA but i would stick with it because the rewards are SOOO sweet!

 

The heads are from patriot and from what they say the heads are stock and not milled. Im running a Comp Xer cam, now what I do not know is if those cams have smaller base circle. If that is the case then I can see the 7.400 push rods Im running being too short?

My other problem is I bought this motor from 2bseen and now I can not get intouch with them to talk about the motor. Mahle n2o coated pistons, callies rods, eagle crank. It has patriot stage 2 ls6 heads and 10.5 compression ratio. It has a comp cam 238/242 605/615 113 lsa stock rockers , LS7 lifters

 

With that higher lift cam you probably have a tiny base circle. Get a pushrod length checker and see what length you really need. I had a 1.42 base circle(<<tiny base circle) on stock milled heads and ran a 7.450" pushrod.

 

Im going to try to find a comp cams length checker tomorrow, they look easy. Im thinking 7.425 is needed now.

 

Since all of that math and what-not didn't make much sence to me.(and I'm lazy) I was wondering if there was someone you could call, and give them your specs. Like Patriot or Comp Cam?

 

My valve train makes the same noise. Sounds like a sewing machine. I was told that's just how it sounds after you swap out the springs and pushrods.

 

The only way that would be true is if you get the wrong length (too short) pushrods.

 

Mine sounded the same way before swapping pushrods. I would def check them first.