Piston, Piston Ring And Connecting Rod Installation - Isuzu NHR 4J Series Workshop Manual

6) Tap the piston pin out with a hammer and a brass bar.
If the pistons and piston pins are to be reinstalled,
mark their installation positions by tagging each piston
and piston pin with the cylinder number from which it
was removed.
6A1-57-1.tif
INSTALLATION
6. Piston and Connecting Rod Assembly
1) Try to insert the piston pin into the piston pin hole with
normal finger pressure.
Weigh each piston and connecting rod assembly.
Select piston and connecting rod combinations so that
the weight variation of the different assemblies is held
within the specified limits.
2) Clamp the connecting rod in a vise.
Take care not to damage the connecting rod.
3) Use a pair of pliers to install the piston pin snap ring to
the piston.
NOTE:
6A1-57-2.tif
When changing piston/connecting rod combinations,
do not change the piston/piston pin combination.
4) Install the piston to the connecting rod.
The piston head front mark
"ISUZU" casting mark
direction.
6A1-57-3.tif
4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 57
Variance in weight
after assembly
"
Less than
3(0.1058)
!
and the connecting rod
must be facing the same
g(oz)