I put a Blueprint 383 stroker in my '97 c1500. It came with long slot non rollers. Before installing I put a set of Summit brand 1.6 roller rockers on. Adjusted them on the stand to 0 lash + 3/4

I noted some excessive noise from both banks, maybe one rocker each side. After ~ 500 miles I readjusted them to zero + 1/4 turn. Had one rocker on left bank still making a bit of noise. Re-adjusted tonight to zero + 1/2. Same thing. One rocker clacking a bit too much.

I know a lot can lead to the symptom. Pushrod length (BTW - never pulled the rods out) lazy lifter etc... But considering its a new mill I would like to think its not a lifter problem and the rods were spec'ed properly during the build.

Could it be - you get what you pay for with the roller rockers? Once in a while one just makes noise with a "cheap" set?

I haven't run it with the OEM rockers in - I guess that would be the next step?

 

Did you check the wipe pattern on the tip of the valve? Never assume someone spec'd the right pushrods, it is very easy to check. Use a black sharpie and see where the roller contacts.

 

Have not but I will tonight!

 

I heard about noisy rockers when I did the 5.7 vortec in our old Denali. After a bunch of research I noticed that nobody was complaining about Scorpion rollers. After a bit more research, I went with them. Zero complaints.

 

i think most people notice the valvetrain noise more if they happened to install long tube headers at the same time