Service Diagnosis—Mechanical; External Oil Leaks; Excessive Oil Consumption - Jeep J-10 Series 1982 Technical & Service Manual

1A-4 GENERAL SERVICE AND DIAGNOSIS
Service Diagnosis—Mechanical
Condition
Possible Cause Correction
EXTERNAL OIL
(1)
Fuel pump gasket broken or
(1)
Replace gasket.
LEAKS
improperly seated.
(2)
Cylinder head cover RTV Sealant
broken or improperly seated.
(2)
Replace sealant; check cylinder
head cover gasket flange and
cylinder head sealant surface for
distortion.
(3)
Oil filter gasket broken or im
properly seated.
(3)
Replace oil Alter.
(4)
Oil pan side gasket broken or
improperly seated.
(4)
Replace gasket; check oil pan
gasket flange for distortion.
(5) Oil pan front oil seal broken or
improperly seated.
(5)
Replace seal; check timing case
cover and oil pan seal flange for
distortion.
(6)
Oil pan rear oil seal broken or
improperly seated.
(6)
Replace seal; check oil pan rear
oil seal flange; check rear main
bearing cap for cracks, plugged
oil return channels, or distortion
in seal groove.
(7)
Excess crankcase pressure
because of restricted PCV valve.
(7)
Replace PCV valve.
(8)
Timing case cover oil seal broken
or improperly seated.
(8)
Replace seaL
(9)
Oil pan drain plug loose or has
stripped threads.
(9)
Repair as necessary and tighten.
(10)
Rear oil gallery plug loose.
(10)
Use appropriate sealant on
gallery plug and tighten
(11)
Rear camshaft plug loose or
improperly seated
(11)
Seat camshaft plug or replace
and seal, as necessary.
(12)
Distributor base gasket
damaged.
(12)
Replace distributor base gasket.
EXCESSIVE OIL
(1)
Oil level too high.
(1)
Lower oil level to specifications.
CONSUMPTION
(2)
Oil too thin.
(2)
Replace with specified oil.
(3)
Valve stem oil deflectors are dam
aged, missing, or incorrect type.
(3)
Replace valve stem oil
deflectors.
(4)
Valve stems or valve guides worn. (4)
Check stem-to-guide clearance
and repair as necessary.
(5)
Piston rings broken, missing. (5)
Replace missing or broken rings.
(6)
Incorrect piston ring gap.
(6)
Check ring gap, repair as necessary.
(7)
Piston rings sticking or excessively
loose in grooves.
(7)
Check ring side clearance, repair
as necessary.
(8)
Compression rings installed up
side down.
(8)
Repair as necessary.
(9)
Cylinder walls worn, scored, or
glazed.
(9)
Repair as necessary.
60259A
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