Assembling The Piston - SSANGYONG Actyon Sports II 2012.01 Manual

02-40
(3) Functions
Piston transfers the combustion energy from engine to connecting rod. Especially in the direct
injection engine such as D20DTF, it provides the combustion space and largely effects to the
engine performance and exhaust gas.
▶
Piston ring
- #1 ring (Top ring) : Prevents the high pressurized combustion gas from leaking into crank
chamber, and prevents the engine oil getting into combustion chamber.
-
#2 ring: Scrapes the engine oil on the cylinder bore, and prevents the leaked combustion gas
from #1 ring from leaking into the crank chamber.
-
Oil ring: Scrapes the engine oil on the cylinder bore.
▶
Piston pin
-
Connects the piston the connecting rod, and transfers the linear movement of piston to
connecting rod to convert it to rotating energy
▶
Snap pin
-
Locks the piston pin.

(4) Assembling the piston

1. Install the piston rings with the "Y" mark on
the ring facing upwards.
Position the end gap of #1 ring at 180˚
2.
away from the end gap of #1 ring.
Position the end gap of oil ring at 180˚
3.
away from the end gap of coil spring, and
position the end gap of oil ring at 90˚ away
from the end gap of #2 ring.