8/3/2019 6.4L Lubrication System
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Lubrication System Features
IntegratedOilCooler
NoExternalOilPassagesinCrankcase
EasyAccessCartridgeStyleOilFilter
ExternalOilPressureRegulator
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Lubrication SyStem
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Lubrication System Features
The6.4LPowerStrokeDieselusesanoilcoolerthatismountedinthevalleyotheengineundertheoillter.
Theoillterisacartridgestyleltermountedonthetopotheengineoreaseoservice.Thissystemalsoincorporatesavalvethatdrainstheoiltothepanwhenthelterisremoved.
Thegerotoroilpumpandoilpressureregulatorarebothlocatedintherontotheenginebehindthevibrationdamperintheirownremoveablealuminumhousing.
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Lubrication System Oil Flow
Oilisdrawnromtheoilpanthroughthepick-uptube.Theoilisthenroutedthroughapassagecastintotheupperoilpanbeorebeingroutedthroughapassageintheblock,apassageintherontcover,andnallytotheoilpumpinlet.
Theregulatorvalveutilizesaorce,providedviatheregulatorspring,toapplyapressureequalto65psi.Wheneveroilpressure
exceedsthisorce,theregulatorvalvewillmovedownwardandallowtheexcesspressuretobleedobackthroughapassagethatroutestheoilbacktotheinletsideothepump.
Fromtheoilpump,oilisdirectedtotheoilcoolerandthentotheoillter.
Fromtheoilltertheoilissuppliedtoachamberincorporatingve(5)passages.One(1)istotheturbochargersorlubrication.Two(2)aretotheEOTandEOPsensors.
Thetwo(2)otherpassagesaretothetappetoilsupplyontherightandletbanks.Thetappetgalleriesalsoprovideoiltothepistoncoolingjets.
Crossdrillingsootherightbanktappetgallerysupplyoiltothemainbearings.
Anothercrossdrillingverticallyupromeachmainbearingsuppliesoiltothecamshatbearings.
Note: This oil supply routing is dierent than the 6.0Land uses dierent bearings which are also placeddierently with respect to the oil holes.
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Pick-up Tube / Oil Aeration
Thepick-uptubesuppliesoilromtheoilpantotheoilpump.
Thepick-uptubeissealedtotheupperoilpanutilizingano-ring.Itheo-ringisdamagedormissing,itcouldcauseoilaeration.
Oil Pressure Regulator
Theoilpressureregulatorislocatedinthegerotorhousingjusttotheright(whenlookingattheengineromtheront)othegerotoroilpump.
Theoilpressureregulatoriscalibratedtoopenatpressuresabove65psi.Itshouldbeclosedbelowthatpressure.
Theregulatorvalveutilizesaorce,providedviatheregulatorspring,toapplyapressureequalto65psi.Wheneveroilpressureexceedsthisorce,theregulatorvalvewillmovedownwardandallowtheexcesspressuretobleedobackthroughapassagethatroutestheoilbacktotheinletsideothepump.
Gerotor Oil Pump
Thegerotoroilpumpisdrivenoothefatsonthenoseothecrankshat.
Thegerotoroilpumpandregulatorvalveareheldintheirownremoveablehousing.
Alignment Dowels
Inner Gear Outer Gear
Dowel Locations
Upper Oil PanPick-up Tube
Oil Pump
Oil Pressure Regulator
Regulator
Housing
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Lubrication SyStem
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Oil Cooler Flow
Oil Filter Base
Oil Cooler Cover
Oil CoolerUncooled/Unfiltered Oil
Cooled/Unfiltered Oil
Cooled/Filtered Oil
Filter Drainback Oil
LubeSystemFlow:OilCooler
Uncooled/Unlteredoilisdirectedoutothecrankcaseattherontletcornerotheengineviaadrilledpassageromtheoilpump.
Uncooled/Unlteredoilisthendirectedacrosstheoilcoolercoverthendownintotheoilcooler.
Theoilisthencooledviatheoilcoolerasitpasses
throughthecoolertowardstherontotheengine. Thecooled/unlteredoilisroutedupthroughtheoilcoolercover
thenthroughtheoillterbasewhereitenterstheoillterhousing(thereisasmallinletvalveintheoillterbasethattheoilmustpassthroughtokeeptheoilromdrainingoutothelterhousingduringnon-operation).Atthispointtheoilfowsthroughthelter(romtheoutsideotheltertothecenter)whereitiscleaned.
Note: There is an oil lter bypass valve located at the top othe oil lter stand pipe (plastic tube the oil lter slides over)which will open and allow unltered oil to enter the systemwhenever a pressure dierential o 27 psi is reached.
Aterbeingcleanedviatheoillter,theoilisroutedthroughtheoillterbaseandintoacavitythathasportstodirecttheoiltotheollwingareas:letandrightoilgalleries,turbochargeroilsupply,andtheEOT&EOPsensors.
Note: There is a drain valve inside the oil lter base which is heldclosed by the oil lter whenever the oil lter cap is tight. Whenever
this cap is loosened, the valve is allowed to open and oil will thenescape through this valve, through the oil cooler cover, and thendown through a drilled passage in the crankcase to the oil pan.
Note: There is an oil cooler bypass valve inside the oilflter base which will open and let uncooled oil bypassthe oil cooler and enter the oil lter housing whenevera pressure dierential o 25 psi is reached.
Inlet/Anti-Drainback Valve
Oil Cooler Bypass Valve
Drain Valve
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Front Cover
Oilfowsromthecrankcasetotheoilpumpviaapassagethroughtheupperoilpan,rontcover,andoilpumphousing.
Whentheoilpumpisturnedbythecrankshatitcreatesoifowandpushesoilthroughtwopassages.Onepassageistotheoilcoolerandtheotheristhroughtheoilpressureregulatorthentotheoilpumpinlet(thispassageisonly
usedwhenpressureexceeds65psi).Whentheoilreachesthenumerousrestrictionsthroughouttheengine,pressureisthencreated(pressureistheresistancetofow).
Allothepassagesromtherontcovertothecrankcasearesealedwitharubbercoatedmetal,onepiecegasket.
Oil Filter Base
Theoillterbasecontainsthemountingprovisionsortheoillterhousingandtheoillterstandpipe(whichcontainstheoillterbypassvalve).
Insidetheoillterhousing,therearetheollowingvalves:Inlet/Antidrainbackvalve,oilcoolerbypassvalve,andtheoillterdrainvalve.
TheoillterbasealsocontainstheportsortheEOT,EOP,andturbochargeroilsupply.Theseportsareallconnectedwiththecooled/lteredoilpassagedirectlybeneaththem.
Oil Cooler Cover
Theoilcoolercoverhaspassagesinittodirectthefowocoolantandoil.
Oilisroutedromtherontothecrankcasetotherearothehousingwhereitenterstheoilcooler.Theoilpassesromtherearotheoilcoolertotherontothecoolerandiscooledintheprocess.Theoilisthen
senttotheoillterthroughtheoillterbase.Filteredoilissenttotheoilpassagesinthecrankcase,theturbochargersupplyline,andtheEOT/EOPsensors.
Thecoolantisdirectedromtherontothecrankcasetotherontotheoilcooler.Itthenpassesthroughtheoilcoolerandcoolstheoil.Asthecoolantexitstherontothecooleritisdirecteddownintothecoolantstreamwhereitre-entersthecrankcasecoolingsystem.
Note: I the oil cooler is damaged it could causecontamination o the lubrication and cooling systems.
Coolant Into
Cooler
Coolant From WaterPump Right Oi l Supply Lef t Oil Supply
Coolant out
from Cooler
Coolant Back
to Block
Oil from
Cooler
Oil into
Cooler
Oil From
Pump
Oil Filter
Drain
EOP
EOT
Oil Cooler Bypass
Turbocharger
Oil Feed
Inlet/Anti Drain Back
Oil Filter Drain
Supply to Engine
(clean oil from
filter)
One Piece Gasket
Oil PumpOutlet/Oil CoolerSupply
Oil Pump Inlet
Diagnostic Port
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Oil Filter Element
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Oil Pump Flow (back side)
Theoilpumpisagerotorstylepumpdrivenoothefatsontherontotheenginescrankshat.
The6.4Loilpumpisheldinitsownremoveablealuminumhousingwhichalsocontainstheregulatorvalve.
Oilisdrawnintothepumpviathecombinationoatmosphericpressure(appliedtotheoilinthepan)andthelowpressureareathatiscreatedbetweenthegerotorgearsontheinletsideothepumpwhenever
thepumpisbeingdrivenbythecrankshat. Oncethishappens,theoilwillfowintothepumpand
thepumpwillcreateagenerousamountooilfow.
Whentheoilreachesvariousrestrictionthroughouttheengine,pressureiscreated.
Pressureislimitedviaapressureregulatorvalvelocatedinsidethepumphousing.Wheneverapressureo65psiisreached,theregulatorvalvewillopenandallowpressurizedoiltofowbackthroughareliepassagetotheinletsideothepump,thusregulatingsystempressure.
Oil Filter
The6.4LPowerStrokeDieselusesacartridgestyleoillter,locatedonthetopotheengine.
Whentheoillterisremoved,theoillterhousingdrainvalveisautomaticallyopenedtodrainmostotheoilromthehousing.
Theoillterelementsnapsintotheoillterlid.
Note: The oil lter lid should be removed beoredraining the oil rom the oil pan so that the oil candrain rom the lter housing into the oil pan.
Turbocharger Oil Supply
Oilissuppliedtotheturbochargersromtheoillterbaseviaasteeloilline,asteelTtting,andtwoseparatesteellinestoeachturbo(thehighpressureturbochargeroilsupplylinehasafexiblelinkinit).
Theoillinesareconnectedtoeachturbovia
banjottingsandwashergaskets.Note: The washer gaskets (which are used as a gasketmedium) must be replaced each time the banjo ttings areloosened.
43Inlet From Oil Pan
Back Side of Pump
Outlet to
Oil Cooler
Regulator
ValveRelief Passage
Low Pressure Turbocharger
Oil Supply
High Pressure Turbocharger
Oil Supply
Pump Rotation
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Turbocharger Oil Drain Tubes
Oilissuppliedtotheturbochargerstolubricateandcoolthebearings.
Eachturbochargerhasitsowndrain.Thehighpressureturbochargerusesaremoveabletubewhereasthelowpressureturbochargerutilizesasmallextensiontubeooamachinedpassageintheturbochargerpedestal.
Thehighpressureturbochargerdraintubeissealedviatwo(2)O-rings,oneateachendothetube.
Thelowpressureturbochargerdrainextensiontubeissealedviaarubbercoatedmetaltube.
Oil Pan / Bed Plate
The6.4LPowerStrokeDieselusesatwopieceoilpan.Thelowerhaliswiderthanthebottomotheenginetoincreasetheoilcapacityothesystem.Duetothiswideroilpan,anupperoilpanisusedtoadaptthelowerpantothebedplate.Theupperpanalsoactsasanoilbafe.
Theupperpanisboltedtothebedplate.Thebedplatereplacestheindividualmainbearingcaps,resultinginamorerigidbearingretainingsystem.
Low Pressure Turbocharger
Oil Drain
High Pressure Turbocharger
Oil Drain
Lower Oil Pan
Upper Oil Pan
Bed Plate