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200 TROUBLESHOOTING
EXCESSIVE BLUE OR WHITE SMOKE
200776a
EXCESSIVE FUEL CONSUMPTION
200777a
EXCESSIVE OIL CONSUMPTION
200778a
Possible Cause
Correction
1. Engine lubricating oil level too high.
1. Drain excess lubricating oil. If the oil is contaminated with either
fuel or coolant, completely drain the oil pan. Change the oil filters.
Locate the source of the leak and correct. Fill with MACK-specified
engine oil. Check the oil level with the dipstick. DO NOT overfill.
2. Turbocharger oil seal failure.
2. Check for oil in the inlet manifold. Install remanufactured
turbocharger.
3. Worn piston rings.
3. Check cylinder walls for scuffing. Clean or replace sleeves as
required. Install new piston rings.
4. Engine misfiring or running rough.
4. Check items as outlined in ENGINE MISFIRES in this section.
5. Incorrect fuel injection pump-to-engine timing.
5. Check and reset timing as required.
Possible Cause
Correction
1. Restrictions in the air induction system.
1. Inspect system. Remove restrictions and replace defective parts
as required.
2. External fuel system leakage.
2. Check external piping on fuel system for signs of fuel leakage.
Repair as required.
3. Incorrect fuel injection pump-to-engine timing.
3. Check fuel injection pump-to-engine timing. Reset as required.
4. Defective injection nozzle assembly.
4. Isolate defective nozzle assembly. Repair or replace as required.
5. Incorrect fuel injection pump calibration.
5. Remove injection pump and nozzle assemblies from the engine.
Send the pump to an authorized MACK Fuel Injection System
Repair facility for recalibration. Then reinstall the pump and nozzle
assemblies.
6. Internal engine wear.
6. Overhaul engine.
Possible Cause
Correction
1. External oil leaks.
1. Check engine for visible signs of oil leakage. Look for loose or stripped
oil drain plugs, broken gaskets (cylinder head cover, etc.) and front and
rear oil seal leakage.
2. Clogged crankcase breather pipe.
2. Remove obstructions.
3. Excessive exhaust back pressure.
3. Check exhaust pressure. Repair as required.
4. Worn valve guides.
4. Replace valve guides.
5. Air compressor passing oil.
5. Repair or replace air compressor.
6. Turbocharger sealing rings failure.
6. Check for oil in the inlet manifold. Install remanufactured turbocharger.
7. Internal engine wear.
7. Overhaul engine.
5-101.bk Page 6 Friday, March 17, 2006 11:05 AM
Summary of Contents for E7
Page 1: ...E7 ENGINE OVERHAUL AUGUST 1997 ENGINE 5 101...
Page 2: ...Page 0 front fr5 Page 0 Friday March 17 2006 11 04 AM...
Page 5: ...E7ENGINE OVERHAUL MARCH 2006 2 5M REP AUGUST 1997 10M MACK TRUCKS INC 1997 ENGINE 5 101...
Page 13: ...ABOUT THIS MANUAL Page ix ABOUT THIS MANUAL front fr5 Page ix Friday March 17 2006 11 04 AM...
Page 15: ...TABLE OF CONTENTS Page xi TABLE OF CONTENTS front fr5 Page xi Friday March 17 2006 11 04 AM...
Page 24: ...Page xx NOTES front fr5 Page xx Friday March 17 2006 11 04 AM...
Page 31: ...200 SPECIFICATIONS Page 2 1 SPECIFICATIONS 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 55: ...200 ENGINE REMOVAL Page 3 1 ENGINE REMOVAL 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 58: ...Page 3 4 NOTES 5 101 bk Page 4 Friday March 17 2006 11 05 AM...
Page 90: ...Page 4 32 NOTES 5 101 bk Page 32 Friday March 17 2006 11 05 AM...
Page 91: ...200 BENCH PROCEDURES Page 5 1 BENCH PROCEDURES 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 158: ...Page 5 68 NOTES 5 101 bk Page 68 Friday March 17 2006 11 05 AM...
Page 159: ...200 ENGINE ASSEMBLY Page 6 1 ENGINE ASSEMBLY 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 240: ...Page 6 82 NOTES 5 101 bk Page 82 Friday March 17 2006 11 05 AM...
Page 272: ...Page 8 10 NOTES 5 101 bk Page 10 Friday March 17 2006 11 05 AM...
Page 273: ...200 TROUBLESHOOTING Page 9 1 TROUBLESHOOTING 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 292: ...Page 9 20 NOTES 5 101 bk Page 20 Friday March 17 2006 11 05 AM...
Page 293: ...200 APPENDIX Page 10 1 APPENDIX 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 295: ...200 APPENDIX Page 10 3 E7 LUBRICATION SYSTEM 5 101 bk Page 3 Friday March 17 2006 11 05 AM...
Page 296: ...Page 10 4 200 APPENDIX E7 COOLING SYSTEM 5 101 bk Page 4 Friday March 17 2006 11 05 AM...
Page 297: ...INDEX Page 11 1 INDEX INDEX FR5 Page 1 Friday March 17 2006 11 04 AM...
Page 302: ...Page 11 6 NOTES INDEX FR5 Page 6 Friday March 17 2006 11 04 AM...
Page 303: ...E7 ENGINE OVERHAUL PRINTED IN U S A ENGINE 5 101 MACK TRUCKS INC 1997...