View Single Post
  #10  
Old 09-17-2023, 10:55 AM
Stan Weiss's Avatar
Stan Weiss Stan Weiss is offline
Ultimate Warrior
 
Join Date: Jul 2013
Location: Philadelphia, PA
Posts: 5,339
Default

Quote:
Originally Posted by vicgto View Post
I started noticing a valvetrain ticking sound recently, pulled the valve cover and saw a rocker tip roller pin almost out.Attachment 620119 . I also saw 2 other rockers with loose pins. Needles to say I've lost all confidence in these rockers, they have less than 2000 miles on them. Something weird that I noticed when checking lash which I usually do before resetting is that most of the intake clearances were bigger anywhere from .005" to .015" form the initial .006". Not sure why this is but I think it might be to do with wear on the nut where it contacts the rocker shaft, there is a small contact area there and there seems to be some wear showing. There is sufficent retainer to guide clearance (.070") and not going into coil bind, Springs are Crane 99893 set up at 1.810" installed height.
Cam is OF with about .630 lift with Comp Solid Roller lifters. Looking for suggestion on new rockers, H & S or Scorpian, which one would give better valvetrain geometry, current have 9.4 inch pushrods which I did check for straightness.. KRE D port heads.
Looking at the roller on that rocker I would pull the rocker check the valve tip. If it show wear I would pull the spring and check valve to guide clearance.

Stan
Attached Thumbnails
Click image for larger version

Name:	rocker_tip.jpg
Views:	1186
Size:	62.3 KB
ID:	620126  

__________________
Stan Weiss/World Wide Enterprises
Offering Performance Software Since 1987
http://www.magneticlynx.com/carfor/carfor.htm
David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software
http://www.magneticlynx.com/DV
Download FREE 14 Trial IOP / Flow Software
http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php
Pontiac Pump Gas List
http://www.magneticlynx.com/carfor/pont_gas.htm
Using PMD Block and Heads List
http://www.magneticlynx.com/carfor/pont_pmd.htm