Service manual

POWR
Power unit
5-39
69J1D11
3. Measure the camshaft runout. Replace if
out of specification.
4. Measure the camshaft journal diameter
c
and cylinder head journal inside diam-
eter
d
. Replace the camshaft and cylin-
der head if out of specification.
5. Calculate the camshaft oil clearance
e
as follows. Replace the camshaft and
cylinder head as a set if out of specifica-
tion.
Checking the timing chain tensioner
1. Measure the plunger extended length
a
.
Replace if out of specification.
NOTE:
Check the timing chain tensioner every 400
hours of operation.
Checking the timing chain
1. Check the timing chain for damage or
wear. Replace if necessary.
Checking the cylinder head
1. Eliminate carbon deposits from the com-
bustion chambers and check for deterio-
ration.
Camshaft runout limit:
0.03 mm (0.0012 in)
Camshaft journal diameter
c
:
24.96–24.98 mm
(0.9827–0.9834 in)
Camshaft cap inside diameter
d
:
25.00–25.02 mm
(0.9843–0.9850 in)
S69J5970
Camshaft oil clearance
e
=
Camshaft cap inside diameter
d
–
Camshaft journal diameter
c
:
0.02–0.06 mm (0.0008–0.0023 in)
Timing chain tensioner wear limit
a
:
1.0 mm (0.04 in) from standard