4
A
CYLINDER HEAD
90-857138R1 MAY 2000 Page 4A-1
POWERHEAD
Section 4A - Cylinder Head
Table of Contents
Specifications 4A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 4A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quicksilver Lubricants and Service Aids 4A-3. . . . . .
Cylinder Block 4A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intake/Exhaust Valves 4A-6. . . . . . . . . . . . . . . . . . . . .
Adjustments 4A-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Clearance 4A-8. . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Removal 4A-11. . . . . . . . . . . . . . . . . . .
Cylinder Head Disassembly 4A-11. . . . . . . . . . . . . . .
Cleaning and Inspection 4A-13. . . . . . . . . . . . . . . . . . .
Cylinder Head 4A-13. . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Resurfacing 4A-14. . . . . . . . . . . . .
Valves 4A-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Springs 4A-20. . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Reassembly 4A-21. . . . . . . . . . . . . . . .
Cylinder Head Installation 4A-23. . . . . . . . . . . . . . . . .
Specifications
VALVE SPRING
Free Length (Intake/Exhaust) “a”
Tilt Limit “b” (Intake/Exhaust)
4/5 (1999)
4/5/6 (2000 & Newer)
Compressed Pressure (Installed)
Intake/Exhaust:
Closed Height 0.965 in. (24.4 mm)
4/5 (1999 & 2000)
6 (2000)
4/5/6 (2001 & Newer)
Open Height 0.709 in. (17.4 mm)
4/5 (1999 & 2000)
6 (2000)
4/5/6 (2001 & Newer)
Direction of Winding (Intake/Exhaust)
a
b
a = 1.260 in. (32.0 mm)
b = 0.044 in. (1.12 mm)
a = 1.378 in. (35.0 mm)
b = 0.044 in. (1.12 mm)
17 lbf. (7.7 kgf)
24 lbf. (10.8 kgf)
24 lbf. (10.8 kgf)
31 lbf. (14.0 kgf)
39.4 lbf. (17.9 kgf)
39.4 lbf. (17.9 kgf)
Right Hand
CYLINDER HEAD
Warp Limit *
* Lines indicate
straight edge
measurement
0.0012 in. (0.03 mm)
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