YH4
GRAND
VITARA
1B-8
AIR CONDITIONING (OPTIONAL)
DIAGNOSIS OF ABNORMAL NOISE
There are various types of noise, ranging from those produced in the engine compartment to those from the pas-
senger compartment, also from rumbling noises to whistling noises.
ABNORMAL NOISE FROM COMPRESSOR
Condition
Possible Cause
Correction
During compressor operation, a
rumbling noise is heard
proportional to engine
revolutions.
Inadequate clearance in piston
area (piston or swash-plate).
Repair or replace compressor as
necessary.
A loud noise is heard at a certain
rpm, disproportionately to engine
revolution.
Loose or faulty V-belt.
Loose mounting bolts.
Adjust V-belt tension, or
replace belt.
Retighten mounting bolts.
A loud rattle is heard at low
engine rpm.
Loose compressor center bolt.
Retighten center bolt.
Replace compressor if it was
operated in this condition for a
long time.
ABNORMAL NOISE FROM MAGNETIC CLUTCH
Condition
Possible Cause
Correction
A rumbling noise is heard when
compressor is not operating.
Worn or damaged bearings.
Replace bearings.
A chattering noise is heard when
compressor is engaged.
Faulty clutch gap (excessive).
Worn clutch friction surface.
Compressor oil leaked from shaft
seal, contaminating the friction
surface.
Adjust clutch gap.
Replace clutch.
Replace compressor shaft oil
seal.
ABNORMAL NOISE FROM TUBING
Condition
Possible Cause
Correction
A droning noise is heard inside
vehicle, but not particularly
noticeable in engine
compartment.
Faulty tubing clamps.
Resonance caused by pulsation
from variations in refrigerant
pressure.
Reposition clamps or increase
the number of clamps.
Attach a silencer to tubing, or
modify its position and length.
ABNORMAL NOISE FROM CONDENSER
Condition
Possible Cause
Correction
Considerable vibration in
condenser.
Resonance from condenser
mounting stay and body.
Firmly insert a silencer between
condenser mounting stay and
body.
Summary of Contents for Grand Vitara 1998
Page 225: ...YH4 GRAND VITARA FRONT SUSPENSION 3D 23 TIGHTENING TORQUE SPECIFICATIONS ...
Page 531: ...YH4 GRAND VITARA 8 6 BODY ELECTRICAL SYSTEM POWER SUPPLY DIAGRAM Refer to Section 8A ...
Page 659: ...YH4 GRAND VITARA BODY SERVICE 9 41 1 Side body outer panel A Apply sealant B Brush treatment ...
Page 673: ...YH4 GRAND VITARA BODY SERVICE 9 55 B B C C 2 DOOR MODEL ...