IO-390-D Series Engine Maintenance Manual
72-50
© 2020 Avco Corporation. All Rights Reserved
Page 234
March 2020
IO-390-D Series Engine Maintenance Manual
10.
Oil Cooler Bypass Valve Removal
A.
Remove and discard the safety wire/cable from the oil cooler bypass valve (Figure 7).
Figure 7
Safety Wire on the Oil Cooler Bypass Valve:
On engines with an oil pressure screen (Figure 8).
On engines with an oil filter (Figure 9).
Remove the oil cooler bypass valve and gasket
from the oil pressure screen housing. Discard the
gasket.
Remove the oil cooler bypass valve from the oil
filter base. Discard the gasket.
Figure 8
Oil Cooler Bypass Valve
(Engine with Oil Pressure Screen)
Figure 9
Oil Cooler Bypass Valve
(Engine with Oil Filter)
11.
Oil Cooler Bypass Valve Cleaning
Clean the oil cooler bypass valve per instructions in the table in Chapter 05-30.
12.
Oil Cooler Bypass Valve Installation
On engines with an oil pressure screen (Figure 8):
On engines with an oil filter (Figure 9):
A.
Apply Food Grade Anti-Seize on the
threads of the oil cooler bypass valve.
A.
Apply Food Grade Anti-Seize on the
threads of the oil cooler bypass valve
B.
Install the oil cooler bypass valve with a
new gasket on the oil pressure screen
housing (Figure 8).
B.
Install the oil cooler bypass valve with
a new gasket on the oil filter base as
shown in Figure 9.
C.
Torque the oil cooler bypass valve to 300
in.-lbs. (34 Nm).
C.
Torque the oil cooler bypass valve to
300 in.-lbs. (34 Nm).
D.
Safety wire/cable the oil cooler bypass
valve.
D.
Safety wire/cable the oil cooler bypass
valve.
