(b) Run engine to operating
temperature.
(c) Change engine oil and filter
again.
5. Excessive bearing clearance.
5. Measure bearings for correct
clearance. Repair as necessary.
6. Excessive end play.
6. Check thrust bearing for wear
on flanges.
7. Crankshaft journal out-of-round
or worn.
7. Replace crankshaft or grind
journals.
8. Loose flywheel or torque
converter.
8. Tighten to correct torque.
OIL PRESSURE DROP
1. Low oil level.
1. Check engine oil level.
2. Faulty oil pressure
sensor/switch.
2. Replace oil pressure
sensor/switch.
3. Low oil pressure.
3. Check oil pressure
sensor/switch and main bearing oil
clearance.
4. Clogged oil filter.
4. Install new oil filter.
5. Worn parts in oil pump.
5. Replace worn parts or pump.
6. Thin or diluted oil.
6. Change oil to correct viscosity.
7. Oil pump relief valve stuck.
7. Remove valve and inspect,
clean, or replace.
8. Oil pump suction tube loose.
8. Remove oil pan and install new
tube or clean, if necessary.
9. Oil pump cover warped or
cracked.
9. Install new oil pump.
10. Excessive bearing clearance.
10. Measure bearings for correct
clearance.
OIL LEAKS
1. Misaligned or deteriorated
gaskets.
1. Replace gasket(s).
2. Loose fastener, broken or
porous metal part.
2. Tighten, repair or replace the
part.
3. Misaligned or deteriorated cup
or threaded plug.
3. Replace as necessary.
OIL CONSUMPTION OR
SPARK PLUGS FOULED
1. PCV system malfunction.
1. Check system and repair as
necessary. (Refer to
EVAPORATIVE EMISSIONS
.
2. Worn, scuffed or broken rings. 2. Hone cylinder bores. Install
new rings.
3. Carbon in oil ring slots.
3. Install new rings.
4. Rings fitted too tightly in
grooves.
4. Remove rings and check
grooves. If groove is not proper
width, replace piston.
5. Worn valve guide(s).
5. Replace cylinder head
2010 Jeep Wrangler Sport
2010 ENGINE 3.8L - Service Information - Wrangler
viernes, 1 de octubre de 2021 05:18:29 p. m.
Page 5
© 2011 Mitchell Repair Information Company, LLC.
