Valve train points to check
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(→Areas of the valve train that need to be checked and verified: add text, links; clean up) |
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==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 | + | 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 | ||
| − | * | + | *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 ( | + | *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) | ||
| − | |||
*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 | + | *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 | ||
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*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"/> | ||
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