Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 161
1D-170 Engine Mechanical: For F9Q Engine
Camshaft and Tappet Inspection
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Camshaft
• Check journals and cam faces for wear or damage.
If any malcondition is found, replace camshaft.
Camshaft thrust play
1) Remove all tappets from cylinder head.
2) Install camshaft to cylinder head.
3) Install camshaft housing referring to “Installation”
under “Camshaft and Tappet Removal and
Installation: For F9Q Engine”.
4) Measure camshaft thrust play using special tool and
dial gauge (1) as shown in figure.If measured thrust
play is out of specification, replace camshaft and/or
cylinder head.
Camshaft thrust play
0.045 – 0.135 mm (0.00178 – 0.00531 in.)
Cam Wear
Using a micrometer, measure cam height “a”. If
measured height underruns its limit, replace camshaft.
Camshaft Journal Wear
Check camshaft journals and camshaft housings for
pitting, scratches, wear or damage.
If any malcondition is found, replace camshaft or cylinder
head with housing. Never replace cylinder head without
replacing housings.
Wear of Tappet
Check tappet for pitting, scratches, or damage.
If any malcondition is found, replace.
Measure cylinder head bore and tappet outside diameter
to determine cylinder head-to-tappet clearance. If
measured clearance is out of specification, replace
tappet and/or cylinder head.
Cylinder head to tappet clearance
0.015 – 0.074 mm (0.00059 – 0.00291 in.)
Tappet outside diameter [A]
34.965 – 34.985 mm (1.37658 – 1.37736 in.)
Cylinder head tappet bore [B]
35.000 – 35.039 mm (1.37796 – 1.37948 in.)
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