Valve train points to check

Jump to: navigation, search
(Created page with ''''Things that need to be checked and verified to be correct:''' *Springs for installed height *Coil bind *Retainer to seal/ valve guide boss at full lift *Retainer to rocker *T…')
 
Line 1: Line 1:
'''Things that need to be checked and verified to be correct:'''
+
'''Here's a list of some areas of the valve train that need to be checked and verified. This is a general guide, and is not all-inclusive. There is no substitute for physically measuring critical areas like piston-to-valve clearances or valve spring installed height and coil bind. For those type things, do not rely solely on published figures:'''
  
 
*Springs for installed height
 
*Springs for installed height
 
*Coil bind
 
*Coil bind
*Retainer to seal/ valve guide boss at full lift
+
*Retainer to seal/valve guide boss at full lift
 
*Retainer to rocker
 
*Retainer to rocker
 
*Trunnion to stud boss
 
*Trunnion to stud boss
*Piston to valve (also both before and after TDC on overlap)
+
*Piston-to-valve clearance (both before and after TDC on overlap)
 
*Push rod to guide slot in head (if used)
 
*Push rod to guide slot in head (if used)
 +
*Can use EITHER self-aligning rockers OR pushrod guide slots in head OR guide plates, not two or more of these at the same time
 +
*”Rails” of self aligning rockers (if used) to retainer
 
*Rocker to valve tip (by adjusting guide plates if used)
 
*Rocker to valve tip (by adjusting guide plates if used)
*Rocker slot to stud (if using stamped/cast rockers w/pivot balls)
+
*Rocker slot to stud (if using stamped rockers w/pivot balls)
 
*Proper geometry (push rod length)
 
*Proper geometry (push rod length)
 
*Rocker/polyloc to valve cover or baffle
 
*Rocker/polyloc to valve cover or baffle
 
*Camshaft endplay
 
*Camshaft endplay
 
*Distributor shaft and gear endplay
 
*Distributor shaft and gear endplay
*Distributor gear to cam gear mesh pattern
+
*Distributor gear material compatible with cam material
*Proper hydraulic lifter preload
+
*Hydraulic lifter preload or solid lifter lash setting
 +
*Timing set phasing
 +
*Cam gear to crank gear alignment
 +
*Cam gear end play if roller cam
 +
*If using the SBC OEM roller lifters and retainers (aka dogbones), lobe lift must be kept below 0.354” so the lifters don’t lose contact w/the retainers
 +
*Cam lobe to connecting rod on strokers
 +
 
  
 
[[Category:Engine]]
 
[[Category:Engine]]
  
 
[[Category:Good articles]]
 
[[Category:Good articles]]

Revision as of 17:34, 9 May 2011

Personal tools
Namespaces
Variants
Actions
Navigation
Categories
Toolbox