Inspection Of Cam Shaft - TOHATSU MFS 60A Service Manual

15) Inspection of Cam Shaft

1. Measure cam height. Replace if the height is less than
specified value.
Cam Height at Both Intake and Exhaust Sides a : Standard Value
35.70 mm (1.4055 in)
Functional Limit : Cam Height at Both Intake and Exhaust Sides a
35.34 mm (1.3913 in)
2. Measure cam shaft runout. Replace if the runout is over
specified value.
Cam Shaft Runout Limit :
0.05 mm ( 0.0020 in)
Measure cam shaft journal outer diameters b and c .
3.
Replace cam shaft or cylinder head if either of the
diameters is less than specified value.
Cam Shaft Outer Diameter (pulley side bearing) b :
Standard Value
41.92 mm (1.6504 in)
Cam Shaft Outer Diameter (oil pump side and center
bearing) c : Standard Value
41.95 mm (1.6516 in)
Limit :
b 41.89 mm (1.6492 in)
c 41.92 mm (1.6504 in)
Measure cylinder head journal inner diameter d.
4.
Cylinder head journal inner diameter d (upper):
Standard Value
42.000 to 42.025 mm (1.65354 to 1.65453 in)
Functional Limit :
42.050 mm (1.65551 in)
5. Calculate the oil clearance using the cylinder head journal
inner diameter d and the camshaft journal outer diameter
b or c.
Oil Clearance : Standard Value
d - b 0.07 to 0.11 mm (0.0028 to 0.0043 in)
d - c 0.04 to 0.08 mm (0.0016 to 0.0031 in)
Functional Limit :
d - b 0.15 mm (0.0059 in)
d - c 0.12 mm (0.0047 in)
If oil clearance is over functional limit, replace
any of cylinder head or cam shaft, or all of them
as a set, and check that the clearance is within
specified range.
4st 60 2019
d
d
d
d
a
5
c
c
c
b
5-33