ENGINE 3-33
CAMSHAFT
The camshaft should be checked for wear and also for runout of
cams and journals if the engine has been noted to produce
abnormal noise or vibration or to lack output power. Any of these
malconditions could be caused by a worn camshaft.
CAMSHAFT CAM WEAR
Worn-down cams are often the cause of mistimed valve opera-
tion resulting in reduced output power. The limit of cam wear is
specified for both intake and exhaust cam in terms of cam height
H, which is to be measured with a micrometer. Replace cam-
shaft if found worn down to the limit.
Cam height H
Service Limit (IN) : 33.480 mm (1.3181 in)
(EX): 32.690 mm (1.2870 in)
09900-20202: Micrometer (25 – 50 mm)
CAMSHAFT JOURNAL WEAR
Determine whether each journal is worn down to the limit or not
by measuring camshaft journal oil clearance with the camshaft
installed. Use plastigauge to read the clearance, which is speci-
fied as follows:
Camshaft journal oil clearance
Service Limit: 0.150 mm (0.0059 in)
09900-22302: Plastigauge
NOTE:
To properly measure the oil clearance with plastigauge, all gas-
ket material must be removed from fitting surfaces of cylinder
head and cover. Do not apply SUZUKI BOND “1216B” until after
the oil clearance has been determined.
• Tighten the cylinder head cover bolts evenly and diagonally to
the specified torque.
Cylinder head cover bolt
(M6): 10 N·m (1.0 kgf-m, 7.3 lb-ft)
NOTE:
Do not rotate the camshafts with the plastigauge in place.
Remove the cylinder head cover, and read the width of the com-
pressed plastigauge with envelop scale. This measurement
should be taken at the widest part.
Be sure to restore each spring, valve and spring
retainer to their original positions.
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