| Problem | Cause | Correction |
|---|---|---|
| Chatter on Cam Nose | Interference of rocker bar motion | Sludge jamming motion, clean or replace |
| Scored bearings | Check for irregularities in rocker bearings | |
| Insufficient lubrication | Tight bearings in rocker bar - lubricate | |
| Insufficient rocker tension |
Tighten rocker tension | |
| Irregular Ramp Contour | Interference of rocker motion | Sludge jamming motion or scored bearing; clean and/or replace; lubricate |
| Loose bearings | Check bearings for excessive wear |
|
| Insufficient contact between master cam and follower |
Ensure positive contact | |
| Poor Quality | Wheel too coarse | Use finer grit wheel |
| Wheel too hard | Use softer grade of grinding wheel |
|
| Poor quality of dressing | Ensure quality diamond and dress technique |
|
| Dirty coolant | Ensure clean coolant and change filter regularly | |
| Poor coolant concentrate | Check coolant |
