5. Inspection and servicing of basic engine parts
194
5.3 Piston and piston pins
Pistons are made of a special light alloy with
superior thermal expansion characteristics.
The back of the piston combustion chamber is oil-
jet cooled.
The ID marks (model mark and size mark) are
incused on the top surface of the piston.
Model mark
Size mark
IMPORTANT:
Piston shape differs among engine models. If
any incorrect piston is installed, combustion
performance will drop. Be sure to check the
applicable engine model identification mark.
Model Mark
3JH4E V88
4JH4E 4JH4
4JH4-TE TE
4JH4-HTE HTE
Size mark
ML
MS
1st compression ring
2nd compression ring
Oil ring
Piston
I.D. mark (Model mark)
I.D. mark (Size mark)
Piston pin
Circlip
010540-00E
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