Subaru 1600 Service Manual page 95

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Camshaft thrust clearance
Standard
0.020 -- 0.090 mm
(0.0008 0.0035 in)
Limit 0.2 mm (0.008 in)
i
A5·297
ENGINE
3) Inspect the journals, and replace
if damaged or worn.
4) Inspect the cam surface for dam·
age, and measure the total height of
the cam. Replace camshaft, if damaged
noticeably or worn beyond the limit.
If damaged only to a minor degree,
grind and correct with an oil stone.
NOTE:
a. The cam lobe is provided with taper
of 4 minutes to cause the valve
lifter to rotate. Be sure to retain
this taper.
1 Camshaft plate 3 Camshaft
2 Thickness gauge 4 Cam gear
Fig. 3·114 Measuring thrust clearance
Specifications of cam lobe height (intake and exhaust)
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Standard
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(Dimension "H")
Wear limit
Dimension "D"
With solid
With solid
With conventional
valve lifter
. With hydraulic
valve lifter
32.24 32.34 mm
(1.2693 1.2732 in)
35.90 - 36.00 mm
(1.4134 - 1.4173 in)
0.15 mm (0.0059 in)
27 mm (1.06 in)
31 mm (1.22 in)
12mm
(O.47.n)
..
~
~
'" Eog'" .... hyd,,"Ii,
L
~~?v~(
lifter: "76"
A5·685
Fig.3-115 Cam lobe shape
b. If a new cam is used, check its
identification mark and groove.
1,800 cc Engine with solid
valve lifter: "72"
l,600cc Engine: "51" rn-
Detail "A" for solid
valve lifter
Detail "A" for hydraulic
valve lifter
A5·686
Fig. 3·116 Cam identification
3-58
c. Whenever the camshaft is replaced
because of its abnormality, replace
the valve lifters with new ones too.
5) Inspect the fit of woodruff key
(5
x
6.5
x
20 mm) in the camshaft
key groove and cam gear key groove,
and if defective replace key or gear,
or correct the key groove.
6) Inspect camshaft and cam gear
contact surfaces for cracks or other
damage, and the cam gear tooth
surface for wear. Replace cam gear
if defective.
7) Measure the cam gear run-out,
and replace cam gear if the run-out
exceeds the limit.
L · . f
!
Imlt at
• 0.25 mm (0.0098 in)
run-ou
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Fig.3-117 Checking cam gearrun-out
8) Measure the backlash between
cam gear and crankshaft gear, by
using Magnet Base (498247001) and
Dial Gauge (498247100). Replace cam
gear if the measurement exceeds the
specified
Iimi
t.
Backlash between crankshaft gear
and cam gear
Standard
0.010 - 0.050 mm
(0.0004 - 0.0020 in)
Limit 0.10 mm (0.0039 in)