8-TROUBLESHOOTING
Engine-Troubleshooting
Problem
PossibleCauseCorrection
Theenginedoesnotstart.Partiallydischargedbatteries.
Check,chargethebatteriesand,ifneces-
sary,replacethem.
Corrodedorlooseconnectionstothebat-
teryterminals.
Clean,inspect,tightenthenutsand,ifnec-
essary,replacetheexcessivelycorroded
terminalsandnuts.
Dirtorwateraccumulationsinfuellines.
Disconnectthelinesandtheinjectionpump
andcarefullycleanthem;ifnecessary,
cleananddrythefueltank.
Nofuelinthetank.
Fillthetank.
Nosupplytotheinjectionpump.
Checkand,ifnecessary,replacethesupply
pump.
Airinthefuelsystem.Checkthelines,thettings,thesupply
pump,theltersandtheinjectionpumpfor
thepresenceofair,thenbleedthesystem.
Damagedstartermotor.Repairorreplacethestartermotor.
Theenginestops.
Irregulardeliveryofthesupplypump.Contactyourdealer.
Dirtorwateraccumulationsinfuellines.
Disconnectthelinesandtheinjectionpump
andcarefullycleanthem;ifnecessary,
cleananddrythefueltank.
Restrictedfuellters.Replacetheltercartridges.
Burnedorcrackedvalves.Replacethevalves.
Airinthefuelsystem.Checkthelines,thettings,thesupply
pump,theltersandtheinjectionpumpfor
thepresenceofair,thenbleedthesystem.
Damagedinjectionpumpcontrols.Replacethedamagedparts.
Theengineoverheats.
Thecentrifugalpumpofthecoolingsystem
isfaulty.
Contactyourdealer.
Faultytemperatureswitch.Replacethetemperatureswitch.
Radiatorpartiallyfaulty.
Eliminatepossiblescalesbywashing,
checkandrepairpossibletubeleaks.
Scalesincoolantpassagecompartments
incylinderheadsandcrankcase.
Carefullywash.
Centrifugalpumpdrivebeltandfandrive
belttooslack.
Checkandadjustbelttension.
Coolant(insufcientquantity).
Restorethelevelintheexpansiontankby
addingtheprescribeduid.
Incorrecttimingoftheengine.Checkandcorrectlytimetheengine.
Restrictedairlter.Cleantheassemblyand,ifnecessary,re-
placethelterelement.
Theenginehas
anomalousknocks.
Partiallyobstructedordamagedinjectors.
Contactyourdealer.
Dirtaccumulationsinfuellines.Cleanthelinesandreplacethevisibly
dentedpipes;ifnecessary,cleantheinjec-
tionpump.
Driveshaftknockscausedbyanexces-
siveclearanceofoneormorecrankshaft
bearingsorbigendbearingsorexcessive
shoulderclearance.
Contactyourdealer.
Unbalanceddriveshaft.Checkthealignmentandthebalanceofthe
driveshaftand,ifnecessary,replaceit.
Looseywheelretainingscrews.
Replacetheloosescrewsandtightenall
screwstotheprescribedtorque+angle.
Connectingrodaxesnotparallel.Straightentheconnectingrods,checkthat
theaxesareparalleland,ifnecessary,re-
placetheconnectingrods.
Cylinderknocksduetoanomalouswear.Contactyourdealer.
8-3