CHECKING YOUR VALVES FOR WEAR
MARGIN

The margin width on each side must be as specified (if no margin exists, the valve can't be reused).

8 VALVE  INTAKE
Standard 0.039" (1.0mm)
Service Limit 0.0236" (0.6mm)
8 VALVE EXHAUST
Standard (Same as Intake)
Service Limit 0.0275" (0.7mm)
16 VALVE INTAKE
Standard 0.05 - 0.047" (0.08 - 1.2mm)
Service Limit 0.0236" (0.6mm)
16 VALVE EXHAUST
Standard  (Same as Intake)
Service Limit 0.0275" (0.7mm)
 

STEM WEAR

 
1. Valve Tip 4. Stem (most worn area)
2. Keeper Groove 5. Valve Face
3. Stern (least worn area) 6. Margin (Shown Above)

8 VALVE ENGINE - STEM INFO
Diameter Intake 0.2742 - 0.2748" (6.965 - 6.980mm)
Diamater Exhaust 0.2737 - 0.2742" (6.950 - 6.965mm)
Stem-to-Guide Clearance - Intake Standard 0.0008 - 0.0019" (0.02 - 0.05mm)
Stem-to-Guide Clearance - Intake Limit 0.0035" (0.09mm)
Stem-to-Guide Clearance - Exhaust Standard 0.0014 - 0.0025" (0.035 - 0.065mm) (Manual has 0.65mm)
Stem-to-Guide Clearance - Exhaust Limit 0.0035 " (0.09mm)
 16 VALVE ENGINE
Diameter Intake 0.2152 - 0.2157" (5.465 - 5.480mm)
Diameter Exhaust 0.2142 - 0.2148" (5.440 - 5.455mm)
S2GC - IS Same as 8VALVE
S2GC - IL 0.0027" (0.07mm)
S2GC - ES 0.0018 - 0.0028" (0.045 - 0.072mm)
S2GC - EL 0.0035 " (0.09mm)