Inspection Of Cam Shaft - TOHATSU MFS 9.9 Owner's Manual

18) Inspection of Cam Shaft

1. Measure cam height. Replace if it is less than specified
value.
Cam Height a at Both Intake and Exhaust Side : Standard Value
24.28 mm (0.9559 in)
Functional Limit : Cam Height a at Both Intake and Exhaust Sides
24.00 mm (0.9449 in)
2. Measure cam shaft runout. Replace if it is over specified
value.
Cam Shaft Runout Limit :
0.05mm (0.0020 in)
Measure cam shaft journal outer diameters c and d.
3.
Replace cam shaft or cylinder head if either of the diameters
is less than specified value.
Cam Shaft Journal Outer Diameter c : Standard Value
17.98 mm (0.7079 in)
Cam Shaft Journal Outer Diameter d : Standard Value
15.97 mm (0.6287 in)
Cylinder Head Journal Inner Diameter e (Upper) :
18.010 - 18.025 mm
(0.7091 - 0.7096 in)
Functional Limit c :
17.95 mm (0.7067 in)
Functional Limit d :
15.95 mm (0.6280 in)
Measure cylinder head journal inner diameter e and oil
4.
pump journal inner diameter f. Calculate oil clearance. Oil
clearances are obtained by e - c and f - d respectively.
Replace cam shaft, cylinder head or oil pump if either of the
clearances is over specified value.
Oil Clearance : Standard Value
0.02 - 0.05 mm (0.0008 - 0.0020 in)
Functional Limit :
0.09 mm (0.0035 in)
If oil clearance is over functional limit, replace
any of cylinder head, cam shaft and oil pump or
all of them as a set, and check that the
clearance is within specified range.
4st 9.9/15/20 2008
d
e
f
a
c
5
e
5-35