12. Engine Locks Power
Probable cause
Possible remedy
Compression poor ....................................................................... Inspect for leaks in cylinder head gasket and replace
Injector nozzles defective............................................................Clean ahd test nozzles. Replace defective nozzle (parn
Energy cell defective ..................................................................Clean or replace energy cell (pars 77-79).
Injection pump defective ............................................................. Replace or repair the injection pump (par. 6-67).
Valves burned or sticking ...........................................................Recondition or replace valves (pars. 77-79).
Piston rings worn or sticking .......................................................Replace piston rings (par. 97-99).
Pistons and sleeves worn ...........................................................Replace pistons and sleeves (pars. 97-99).
13. Engine Exhaust Smokes
Probable cause
Possible remedy
Fuel injectors faulty
Piston rings worn or broken
Exhaust valves not seating properly
Replace the exhaust valves or valve seats
14. Engine Overheats
Probable cause
Possible remedy
Water pump defective ................................................................Repair or replace water pump (para. 46-47).
Radiator leaks ............................................................................. Repair radiator (pars. 41-43).
Engine block cracked .................................................................. Replace engine block (pars. 113-115).
15. Oil Pressure Low
Probable cause
Possible remedy
Suction screen plugged ..............................................................Remove screen and clean (par. 93-95).
Main bearings worn ..................................................................... Inspect bearings for improper clearance, replace bear-
Oil pump worn ............................................................................Replace or repair oil pump (pars. 93-95).
16. Oil Consumption High
Probable cause
Possible remedy
Piston rings are worn, broken, or stuck .......................................Replace piston rings (pars. 97-99).
Pistons and sleeves are worn ...................................................... Replace pistons and sleeves (pars. 97-99).
Main bearings are worn ............................................................... Replace main bearings (par. 109-111).
Valve guides are worn.................................................................Replace valve guides (pars. 77-79).
17. Engine Knocks or Develops Excessive Noise
Probable cause
Possible remedy
Piston pin loose ..........................................................................Locate the loose piston pins by deactivating the in
jectors in turn until the noise stop & Repeat a
Piston or cylinder sleeve broken..................................................Replace the piston or sleeve (pars. 97-99).
Connecting rod bearings worn or loose .......................................Replace defective connecting rod bearings
Injector spray tip valve leaky ....................................................... Repair or replace a faulty injector (par 61-63).
Gear train defective ...................................................................Repair or replace the gear train (par 85-87).
Main bearing worn ......................................................................Replace the main bearings (par 109-111).
Crankshaft worn, tapered, or out-of-round ................................... Repair or replace the crankshaft (pal. 109-111).
Crankshaft end clearance excessive ..........................................Replace the crankshaft thrust washer (par. 109-111).
Flywheel loose ...........................................................................Tighten the flywheel mounting cap screws
AGO 8456A
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