Power Unit Mechanical: 1D-28
Camshaft Identification
DF70A, DF80A and DF90A camshafts differ as indicated
below.
Identification mark
Camshaft Runout
Support camshaft on a surface plate using a set of V-
blocks.
Measure runout using a dial gauge.
If measurement exceeds service limit, replace camshaft.
Special tool
(A): 09900–20606 (Dial gauge)
(B): 09900–20701 (Magnetic stand)
Camshaft runout
Service limit: 0.10 mm (0.0039 in.)
Camshaft Journal Wear
Check camshaft journals and camshaft housings for
pitting, scratches, wear or damage.
If any of the above conditions are found, replace
camshaft or cylinder head with housing.
NOTE
Camshaft housing and cylinder head must be
replaced as a set.
Camshaft Journal Oil Clearance
Check journal oil clearance using Plastigauge as follows.
1) Clean housing and camshaft journals.
2) Install camshaft to cylinder head.
3) Place Plastigauge across the full width of camshaft
journal (parallel to camshaft).
Special tool
(A): 09900–22301 (Plastigauge (0.025 –
0.076 mm))
Model
Identification mark
Intake Exhaust
DF70A 2 0
DF80A 0 0
DF90A 1 1
1. Identification mark
I9J011140197-01
(A)
(B)
I9J011140198-02
I9J011140030-01
I9J011140199-02
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