Subaru 1600 Service Manual page 531

STEERING SYSTEM
5) Noise and vibration
*6
Hiss noise (continuous) Relief Generates at Normal (Don't keep
While engine is running with valve Max. turning this condition over
maximum turning angle sound Angle
5 seconds.)
Generates Defective.
without steering Replace oil pump
operation
assembly.
Rattling noise Interference with adjacent
Check clearance.
[Refer to next article 6)]
(intermittent)
parts
Correct if necessary
While engine is running
Loosened installation of
Oil pump Assy, Pump bracket, Retighten
Gearbox Assy, Cross member
or Connector
Loosened installation of
-
Oil pump pulley or Idler pulley
l
Retighten
Loosened linkage or play of
steering sys. or suspension.
Retighten
-
Loosened tightening of or replace
Universal joint, Rubber
coupling or Column sys.
Knocking Excessive backlash Adjust and
When turning steering wheel Loosened Lock nut for
retighten
in both direction with small adjusting backlash
angle repeatedly at engine
ON or OFF
Loosened tightening or play Retighten or
of Tie-rod, Tie-rod end
replace
*6 Don't keep the relief valve operated over 5 sec. at any time or inner parts of the oil pump may be damaged due to rapid
increase of fluid temperature.
*7 Grinding noise may be heard immediately after the engine start in extremely cold condition.
In this case, if the noise goes off during warm up there is no abnormal function in the system.
This is due to the fluid characteristic in extremely cold condition.
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