Isuzu A-4BG1T - Piston Pin Inspection

l
l
l
lllllllllllllllllllllllllllllllllllllllllllllllll
l
l
l
l
l
l
l
l
l
l
l
I,‘,
ENGINE ASSEMBLY II 619
.
.
L!iEl
.
PISTON PIN
‘k
Piston Pin Outside Diameter
Use a micrometer to measure the piston pin outside
diameter at several points.
If the measured piston pin outside diameter exceeds the
specified limit, the piston pin must be replace.
mm (in)
c
Standard
Limit
Piston Pin Outside
35.000-35.005
34.95
Diameter
(1.3780-1.3781)
(1.3760)
I
Piston Pin and Piston Clearance
Use an inside dial indicator to measure the piston pin
hole.
mm (in)
Piston Pin Hole Diameter
Standard
4BG1,4BGlT, 6BGl
35.01 O-35.01 8
GBGIT
(1.3783-l .3787)
Piston Pin and Piston Pin Hole Clearance
Determine the clearance between the piston pin and the
piston pin hole by calculating the difference between the
piston pin hole diameter and the piston pin outside
diameter.
mm (in)
I
Limit
I
I
Piston Pin and Piston Pin
Hole Clearance
0.050 (0.002)
if an inside dial indicator is not available, use the follow-
ing procedure to check the piston pin fit.
q
0
1. Use a piston heater to heat the piston to approxi-
mately 60°C (140°F).
,2. Push strongly against the piston pin with your
24
thumbs.
The piston pin fitting should feel tight.