Daewoo D1146 Maintenance Manual page 7

D1146/D1146TI/DE08TIS
MAINTENANCE MANUAL
1.2.3. Oil gallery cooling type piston (DE08TIS)
Oil gallery cooling is used for the piston of DE08TIS diesel engine.
When thermal loading is high, piston cooling by means of an oil gallery in the crown is
normally necessary to prevent crown cracking and ring sticking. The design of the
gallery, the design and location of the oil spray nozzle and the quantity of oil flowing in
the gallery are critical in order to achieve the desired temperature reduction.
The cross section shape of the gallery should be designed to achieve sufficient oil
movement to maximize cooling efficiency.
M1255
3
Printed in Jan. 2001 PS-MMA0415-E1A