Suzuki GF60A, Service Manual

Page: 139 / 336

Power Unit Mechanical: 1D-37
• Check water jackets. If clogged or obstructed, clean
water jackets.
Cylinder head distortion
• Using a straightedge and thickness gauge, measure
cylinder head distortion (gasket surface) at a total of
six locations as shown.
If measurement exceeds service limit, resurface or
replace cylinder head.
Special tool
(A): 09900–20803 (Thickness gauge)
Cylinder head distortion
Service limit: 0.06 mm (0.002 in.)
Manifold seating faces distortion
Using a straightedge and thickness gauge, check
cylinder head to manifold seating faces.
If measurement exceeds service limit, resurface or
replace cylinder head.
Special tool
(A): 09900–20803 (Thickness gauge)
Manifold seating faces distortion
Service limit: 0.10 mm (0.004 in.)
Valve and Valve Guide
Valve guide to valve stem clearance
Using a micrometer and bore gauge, take diameter
readings on valve stems and guides to check guide to
stem clearance.
Be sure to take readings at more than one place along
the length of each stem and guide.
If measurement exceeds service limit, replace valve and/
or valve guide. Refer to “Valve guide replacement” (Page
1D-41).
Special tool
(A): 09900–20205 (Micrometer (0 – 25 mm))
Valve stem outside diameter
Using micrometer, measure valve stem outside
diameter.
Valve stem outside diameter
Standard (IN.): 5.465 – 5.480 mm (0.2152 – 0.2157 in.)
Standard (EX.): 5.440 – 5.455 mm (0.2142 – 0.2148
in.)
IAJ611140180-01
IAJ611140181-02
(A)
IAJ611140182-01
(A)
I9J011140038-01
(A)
I9J011140039-02