Subaru 1600 Service Manual page 117

ENGINE
Trouble and possible cause Corrective action
3. Insufficient
1)
Improper valve clearance
Adjust.
engine com-
pression pres·
2) Loose spark plug or defective gasket Tighten or replace.
sure
3) Loose cylinder head nuts or defective Tighten or replace.
head gasket
4) Others
See 3·3, 2 in this Chapter.
4. Others
1)
Overcooling (defective thermostat)
Replace.
2)
Slipping of clutch
Inspect, adjust or replace.
3) Dragging of brake Inspect and adjust.
4) Improper air pressure of tire
Correct.
9. Overheating,
See "Troubleshooting of engine
overcooling,
cooling system" on page 3-83.
coolant leaks
10. Odor of fuel
1)
Fuel leakage from fuel tank, filler Check for cracks or cloggings.
cap, fuel pump and fuel lines. Retighten connecting clamps
or replace.
2) Overflow from float chamber in Adjust float level.
carburetor
3) Leaking evaporative emission lines
Check for cracks or cloggings of
evaporative emission lines.
Retighten clamps on connections.
Replace if necessary .
Type of sound
Condition
Possible cause
11. Excessive
Regular clicking Sound increases as Valve clearance is not normal.
.
en$ine noise
sound engine speed increase.
• Worn valve rocker arm.
Valve clearance is
•
Bent push rod.
normal.
•
Broken valve spring.
• Worn valve lifter hole.
Heavy and dull Oil pressure is low
• Worn crankshaft main bearing.
metallic knock
• Worn connecting rod bearing
(big end).
Oil pressure is normal.
•
Loose flywheel mounting bolts.
•
Damaged engine mounting