140
POWERHEAD
CYLINDER HEAD
mm). If measurement exceeds this limit, resurface
or replace cylinder head.
IMPORTANT:
Cylinder head can be resurfaced,
using a surface plate and #400 grit wet sandpa-
per. Move the cylinder head in a figure eight pat-
tern when sanding.
Inspect and clean water jackets.
Rocker Arm/Push Rod
Inspect rocker arms. Replace if cracked, distorted,
or damaged.
Inspect push rods. Replace if bent or worn.
Valve/Valve Guide
To check valve guide to valve stem clearance,
measure the following:
Valve stem outside diameter:
•
IN 0.2152 to 0.2157 in. (5.465 to 5.480 mm)
•
EX 0.2146 to 0.2152 in. (5.450 to 5.465 mm)
Valve guide inside diameter:
•
IN 0.2165 to 0.2170 in. (5.500 to 5.512 mm)
•
EX 0.2165 to 0.2170 in. (5.500 to 5.512 mm)
005674
005675
005676
005677
004525
Valve guide to valve stem clearance
Standard
Service Limit
IN
0.0008 – 0.0019 in.
(0.020 – 0.047 mm)
0.0028 in.
(0.070 mm)
EX
0.0014 – 0.0024 in.
(0.035 – 0.062 mm)
0.0035 in.
(0.090 mm)
