1D-48 Engine Mechanical: For M16A Engine with VVT
Connecting rod bolt deformation (Plastic
deformation tightening bolt)
Measure each thread diameter of connecting rod bolt (2)
at “A” on 32 mm (1.25 in.) from bolt mounting surface
and “B” on 40 mm (1.57 in.) from bolt mounting surface
by using a micrometer (3).
Calculate difference in diameters (“A” – “B”). If it is
exceeds limit, replace connected rod (1).
Connecting rod bolt measurement points
“a”: 32 mm (1.25 in.)
“b”: 40 mm (1.57 in.)
Connecting rod bolt diameter difference
Limit (“A” – “B”): 0.1 mm (0.004 in.)
Crank Pin and Connecting Rod Bearings
Inspection
S5JB0A1416034
Crank Pin Diameter
Inspect crank pin for uneven wear or damage. Measure
crank pin for out-of-round or taper with a micrometer. If
crank pin is damaged or out-of round or taper is out of
limit, replace crankshaft or regrind crank pin to undersize
and use undersize bearing.
Crank pin diameter
Out-of-round
A – B
Taper
a – b
Crank pin taper and out-of-round
Limit: 0.01 mm (0.0004 in.)
I2RH0B140119-01
Connecting rod bearing
size
Crank pin diameter
Standard
41.982 – 42.000 mm
(1.6528 – 1.6535 in.)
0.25 mm (0.0098 in.)
undersize
41.732 – 41.750 mm
(1.6430 – 1.6437 in.)
I2RH0B140120-01
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