Valve train points to check

Jump to: navigation, search
(Add text, image)
(Areas of the valve train that need to be checked and verified: add text, links; clean up)
Line 30: Line 30:
  
 
==Areas of the valve train that need to be checked and verified==
 
==Areas of the valve train that need to be checked and verified==
This list is not all-inclusive. Not all points will apply to all engine builds. There is no substitute for physically measuring critical areas like piston-to-valve clearances or valve spring installed height and coil bind. For those measurements, do not rely solely on published figures.[[File:Spring clearance diagram1.jpg|thumb|upright=3|Valve spring clearances. Seal to retainer may be less in some cases]]
+
This list is not all-inclusive. Not all areas will apply to all engines and/or builds.<br> {{Note1}}There is no substitute for physically measuring critical areas like piston-to-valve clearances or valve spring installed height and coil bind. For those measurements, do not rely solely on published figures.[[File:Spring clearance diagram1.jpg|thumb|upright=3|Valve spring clearances. Seal to retainer may be less in some cases]]
 
*[[Valve spring installed height]]
 
*[[Valve spring installed height]]
 +
*[[Valve train points to check#Valve train geometry|Correct geometry]]
 
*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
+
*Rocker trunnion (roller rockers) or pivot ball/rocker body (stamped steel rockers) to stud boss
 
*Piston-to-valve clearance (both before and after TDC on overlap). Also see [[Quench]].
 
*Piston-to-valve clearance (both before and after TDC on overlap). Also see [[Quench]].
 
*Push rod to guide slot in head (see image below)  
 
*Push rod to guide slot in head (see image below)  
 
*Use '''EITHER''' self-aligning rockers '''OR''' pushrod guide slots in head '''OR''' guide plates, not two or more of these at the same time
 
*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 to retainer
+
*"Rails" of self aligning rockers to retainer and/or locks
*Rocker to valve tip (by adjusting guide plates if used)
+
*Rocker to valve tip (if needed, adjust guide plates if used)
 
*Rocker slot to stud (if using stamped rockers w/pivot balls)
 
*Rocker slot to stud (if using stamped rockers w/pivot balls)
*Proper geometry
 
 
*Rocker arm/polylok to valve cover or oil baffle
 
*Rocker arm/polylok to valve cover or oil baffle
 
*Camshaft endplay
 
*Camshaft endplay
*Distributor shaft and gear endplay
+
*Distributor shaft endplay and distributor/cam gear mesh/alignment
 
*Distributor gear material compatible with cam material
 
*Distributor gear material compatible with cam material
 
*Mechanical fuel pump pushrod material compatible with cam material
 
*Mechanical fuel pump pushrod material compatible with cam material
 
*Hydraulic lifter preload or solid lifter lash setting
 
*Hydraulic lifter preload or solid lifter lash setting
 
*Timing set phasing
 
*Timing set phasing
 +
*[[Timing tabs and damper TDC lines SBC]]
 
*Cam gear to crank gear alignment
 
*Cam gear to crank gear alignment
 
*Cam gear end play if roller cam
 
*Cam gear end play if roller cam
Line 55: Line 56:
 
*Timing set to timing gear cover
 
*Timing set to timing gear cover
 
*If using the SBC OEM roller cam, lifters and retainers, the '''lobe lift''' must be kept below 0.354” so the lifter won’t lose contact with the retainers
 
*If using the SBC OEM roller cam, lifters and retainers, the '''lobe lift''' must be kept below 0.354” so the lifter won’t lose contact with the retainers
*Cam lobe to connecting rod on strokers
+
*Cam lobe to connecting rod bolt on strokers
  
 
[[File:Sbc prod guide slot.jpg|thumb|left|450px|Red arrows indicate the pushrod guide slot; slot needs elongating towards the rocker stud if 1.6 ratio rockers are used]]<br style="clear:both"/>
 
[[File:Sbc prod guide slot.jpg|thumb|left|450px|Red arrows indicate the pushrod guide slot; slot needs elongating towards the rocker stud if 1.6 ratio rockers are used]]<br style="clear:both"/>

Revision as of 06:06, 16 January 2013

Personal tools
Namespaces
Variants
Actions
Navigation
Categories
Toolbox