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ENGINE DIAGNOSIS—MECHANICAL
CONDITION
POSSIBLE CAUSES
CORRECTION
NOISY VALVES
1. High or low oil level in crankcase.
1. Checkfor correct oil level (refer to Group 0,
Lubrication and Maintenance).
2. Thin or diluted oil.
2. Change oil (refer to Group 0, Lubrication
and Maintenance.
3. Low oil pressure.
3. Check engine oil level.
4. Dirt in tappets/lash adjsuters.
4. Replace rocker arm/hydraulic lash adjuster
assembly.
5. Worn rocker arms.
5. Inspect oil supply to rocker arms.
6. Worn tappets/lash adjusters.
6. Install new rocker arm/hydraulic lash
adjuster assembly.
7. Worn valve guides.
7. Ream and install new valves with oversize
stems.
8. Excessive runout of valve seats.
8. Grind valve seats and valves.
9. Missing adjuster pivot.
9. Replace rocker arm/hydraulic lash adjuster
assembly.
CONNECTING ROD NOISE
1. Insufficient oil supply.
1. Check engine oil level (refer to Group 0,
Lubrication and Maintenance.
2. Low oil pressure.
2. Check engine oil level. Inspect oil pump
relief valve and spring.
3. Thin or diluted oil.
3. Change oil to correct viscosity.
4. Excessive bearing clearance.
4. Measure bearings for correct clearance.
Repair as necessary.
5. Connecting rod journal out-of-round.
5. Replace crankshaft or grind journals.
6. Misaligned connecting rods.
6. Replace bent connecting rods.
MAIN BEARING NOISE
1. Insufficient oil supply.
1. Check engine oil level (refer to Group 0,
Lubrication and Maintenance).
2. Low oil pressure.
2. Check engine oil level. Inspect oil pump
relief valve.
3. Thin or diluted oil.
3. Change oil to correct viscosity.
4. Excessive bearing clearance.
4. Measure bearings for correct clearance.
Repair as necessary.
5. Excessive end play.
5. Check thrust bearing for wear on flanges.
6. Crankshaft journal out-of-round, worn.
6. Grind journals or replace crankshaft.
7. Loose flywheel or torque converter.
7. Tighten to correct torque.
OIL PRESSURE DROP
1. Low oil level.
1. Check engine oil level.
2. Faulty oil pressure sending unit.
2. Install new sending unit.
3. Low oil pressure.
3. Check sending unit and check 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. Excessive bearing clearance.
7. Measure bearings for correct clearance.
8. Oil pump relief valve stuck.
8. Remove valve and inpsect, clean
and install.
9. Oil pump suction tube loose, bent cracked, or
blocked.
9. Remove oil pan and install new tube, or
clean if necessary.
10. Oil pump cover warped or cracked.
10. Install new oil pump.
OIL LEAKS
1. Misaligned or deteriorated gaskets.
1. Replace the gasket.
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.
OIL CONSUMPTION OR SPARK
PLUGS OIL FOULED
1. PCV system malfunction.
1. Check system. Clean and repair, as
necessary (refer to Group 25, Emissions
Control System).
2. Worn, scuffed or broken rings.
2. Hone cylinder bores. Install new rings.
3. Carbon in oil ring slot.
3. Install new rings.
4. Rings fitted too tightly in grooves.
4. Remove the rings. Check grooves. If
groove is not proper width, replace piston.
5. Worn valve guides.
5. Ream guides and replace valves with
oversize valves and seals.
6. Valve stem unseated or defective.
6. Repair or replace seal.
JX
ENGINE
9 - 11
DIAGNOSIS AND TESTING (Continued)
Summary of Contents for 1997 Stratus Convertible LHD
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Page 333: ...Fig 9 Wiper Motor Test JX WINDSHIELD WIPERS AND WASHERS 8K 7 DIAGNOSIS AND TESTING Continued ...
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Page 733: ...Fig 8 Body Splices JX 8W 95 SPLICE LOCATIONS 8W 95 7 DESCRIPTION AND OPERATION Continued ...
Page 734: ...Fig 9 Rear Body Splices 8W 95 8 8W 95 SPLICE LOCATIONS JX DESCRIPTION AND OPERATION Continued ...
Page 735: ...Fig 10 Door Splices JX 8W 95 SPLICE LOCATIONS 8W 95 9 DESCRIPTION AND OPERATION Continued ...
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Page 913: ...Fuel Line Adapter 1 4 JX FUEL SYSTEM 14 59 SPECIAL TOOLS Continued ...
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Page 1033: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC JX TRANSAXLE 21 65 SCHEMATICS AND DIAGRAMS Continued ...
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Page 1169: ...JX EMISSION CONTROL SYSTEMS 25 3 DESCRIPTION AND OPERATION Continued ...
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