denso cri repair guide v4[1]
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REPAIRGUIDEFOR
DENSOCOMMONRAILINJECTORREPAIR
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DISCLAIMER
THEFOLLOWINGDOCUMENTISBASEDONTHERESULTSANDEXPERIENCEGAINEDFROMSTRIPPING,REBUILDINGANDTESTINGNEWGENUINEDENSOINJECTORSUSINGHARTRIDGEALLMAKESTESTEQUIPMENT.
THEINFORMATIONCONTAINEDWITHINISNOTINTENDEDFORUSEASASUBSTITUTETOTHEGENUINEDENSOREPAIRPROGRAM.ITSCONTENTISFORINFORMATIONPURPOSESONLYANDISTOBEUSEDASAGUIDEANDINTRODUCTIONTODENSOCOMMONRAILINJECTORREPAIR.
DIESELDISTRIBUTORSAUSTRALIAPTYLIMITEDANDDIESELDISTRIBUTORSLIMITEDINNEWZEALANDACCEPTSNORESPONSIBILTYFORANYDAMAGEORINJURYTHATMAYOCCURFROMTHEUNAUTHORISEDREPAIR/ADJUSTMENTOFDENSOCRINJECTORS.
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Introduction
TechnicalandrepairinformationsurroundingDensoCommonRailinjectorsoutsideoftheDensonetworkislimitedandscarce,yettheiruseandpresencewithintheAustralasiandieselmarketiswidespread.
Thefollowingdocumentaimstoprovideaguidetousingthetoolingandshimkitstogetherwithgenuineandnongenuineparts,tostrip,rebuildandtestDensoG2typecommonrailinjectors.Theinformationhereinhasbeengainedfromthedismantling,rebuildandconsequentflowandresponsetestingofnewDensoCRinjectorsusingtheHartridgeCriPCandIFT70allmakesprogramme.Alterationstotheshimadjustmentofindividualinjectorsweremadeandtheresultsrecorded.Theseresultshavebeenusedtodeterminewhateffectsanychangestotheshimadjustmenthaveontheoverallperformanceoftheinjector.
Correctioncodes(QRcodes)cannotbewrittenandproducedforanyDensoinjectorusingthisinformation.TheproductionandcreationofQRcodesrequirescomplexsoftwareandintricateflowtestingusinggenuineDenso/Hartridgeauthorisedequipment.DensoCRinjectorrepairinvolvesstringentcleanroompracticesandverytightqualitycontrolonbuildtolerances.PleasetakethisintoconsiderationwhenattemptinganydismantlingofDensoCRinjectors.
HopefullythisguidewillprovideaninsightintowhatcanbeachievedwithtoolingavailableoutsideoftheDensoofficialrepairprogramme.ConsiderationshouldbegiventotheimportanceofcorrectioncodeswhenundertakinganyadjustmentorunofficialrepairofANYcommonrailinjectorthatusesacorrectioncode.
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ComponentOverviewandIdentification:ThephotobelowshowsanexplodedstrippedDensoG2injectorandlabelledcomponents:
Solenoid
CalibrationShim
SolenoidSpringShim
SolenoidSpring
SolenoidValve
HalfBallValve
ValveSeatRetainingNut
ValveSeat
NOPShim
NOPSpring
PressureSpindle
CommandPiston
Nozzle
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DismantlingThefollowingdismantling,rebuildandtestinstructionsarebasedontheuseoftheCRinjectorkit(partnumber850901)andShimKits(850276,850296,850301)availabletopurchasefromDieselDistributors,togetherwithgenuineandnongenuinerepairparts.
STEP1SolenoidRemoval
Figure1 Figure2 Figure3
Mounttheinjectoruprightintheviceusingthecorrectholdingjaws,dependinguponthebodytypeandusingthe27mmcrowsfootgentlyloosenthesolenoid(fig1).OnceloosecontinuetoloosenbyhandandCAREFULLYandGENTLYremovethesolenoid,takingcarenottodropthesolenoidvalvespringortensioningshim(Fig2).
Removethefuelcalibrationshimthatwilleitherstillbesatontheinjectororsatupinsidethesolenoidbody(Fig2).
Thesolenoidvalvecanthenberemovedusinglongnosepliers.TAKECARENOTTODROPTHEHALFBALLVALVE(Fig3).Thisissituatedintheendofthesolenoidvalve.Itissmallandveryeasilylost!!(ReplacementvalvesandhalfballvalvesareavailablethroughDieselDistributors).
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STEP2ValveSeatRemoval
Figure4 Figure5 Figure6
InserttheThreeProngedValveSeatSocketintotheguide(Fig4),ensuringthatthe3prongsarelocatedinthe3holesinthevalveseatretainingscrewandthenscrewtheguideoverthesocket.Tightentheguideallthewaydownbyhanduntilitisfelttobottomout,thenunscrewbyapproximately1/8thofaturn(Fig5).Weneedtoensurethattheinner3prongedsocketwillturn,whilstmaintainingmaximumsupportfromtheguide,minimisingtheriskofthesockettilting.
WARNINGThisnutisusuallyverytight!.Useasuitablebreakerbaranda14mmsocketplacedoverthehexonthe3prongedsockettoundothevalveseatretainingnut(Fig6).Ifunsuccessful,useanelectricheatguntoapplyGENTLE,MODERATEheattothenut,thenusingthebrassdrift,strikethenutandretry.DONOTUSEABLOWTORCH!!Excessiveheatwilldamagetheinjector!
Figure7 Figure8 Figure9
Withthevalveseatremoved(Fig7),carefullyremovethe2locatingdowels(Fig8).Removetheinjectorfromtheholdingjigandturnupwards,whilstholdingyourhandovertheopenendofthebody(Fig9).Thecommandpistonshouldslideout,oratleastbegintoprotrudefromthebore.Withdrawthepistonfromthebody.Ifthereisnomovementofthecommandpistonatthispoint,itmaysignifythatitisseizedortight.Ifthisisthecase,thenitcanbeleftinsitutoberemovedafterthenozzleendhasbeendismantled.
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STEP3CapnutRemoval
Remounttheinjectorintheholdingjigwiththenozzleassemblypointingupwards.
Figure10 Figure11 Figure12
Aswiththevalveseatretainingnut,thenozzleretainingnutcanalsobenotoriouslytight.Onemethodthatcanbeusedtoremovethenutmoreeasilyandminimisetheriskofdamagetothebodythreadandlocatingdowelsinvolvestheuseofapipecuttertoscorethecapandfreethethreadpriortoremoval.ItiscommonpracticetorenewthecapnutonCRinjectorsanyway,sothecapnutwillhavetobediscardedandanewone(availablefromDieselDistributors)willbefittedonrebuild.
Toremovethecapnut,scorealinenodeeperthan0.5mmapproximately15mmfromthebaseofthenut(oppositetonozzleside)aroundthecapnut(Fig10).Then,usingagood15mmsinglehexsocket,undothenut.Thereisa15mmcrowsfootsuppliedinthekit,butthisisbestreservedfortightening,ifusinganinjectoraligningjig.
Oncetheinjectorcapnuthasbeenremoved,thenozzlecanberemovedalongwiththelocatingdowels(Fig11).Finally,removetheinjectorbodyfromthejigandcarefullyturnover,whilstholdingtheneedlespringandremovethespringandspringtensioningshim(Fig12).
Ifthecommandpistonwasnotremovedearlierduetobeingtightorseized,thenitcannowbegentlytappedoutfromoneend.USUALLY,IFTHECOMMANDPISTONREQUIRESFORCETOBEREMOVED,THEINJECTORBODYANDPISTONCANBECONSIDEREDUNSERVICABLEANDNOTWORTHREPAIRING.
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InspectionSolenoidassembly
Figure13
Resistancechecksshouldbemadetothesolenoid.Thespecificresistancemeasuredwilldependuponthetypeofinjectorandshouldbecomparedtoanewunit.TheresistancerecordedontheparticularG2injectorsthatwetestedwasapproximately0.50.7Ohms.
Obvioussignsofanydamagetotheoutercasingorsplits/cracksontheelectricalconnectorshouldbeobserved.Checkforerosion/corrosionoftheelectricalterminalsandensurethattheinnersurfaceofthesolenoidiscleanandfreefromdentsetc(Fig13).
Ensurethatthesolenoidspringisingoodcondition.Itmaybeagoodideatocheckandrecordthelengthagainstanewone.
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SolenoidValveandHalfBallValveassembly
Figure14
Checktheconditionofthesolenoidvalveassembly,payingparticularattentiontothehalfballvalvefaceandtheseatinsidethevalvestem.Theflatfaceofthehalfballvalveisresponsibleforsealingthecontrolchamber,soitmustbeingoodconditionwithnoerosionorwear.Thesecomponentsarebestinspectedunderamicroscope.Checktheconicalseatthattheballseatsoninsidethevalve,aswellasthevalvestemforanysignsofwear,scratchesanderosion(Fig14).
Renewbothcomponentsifthereareanyabnormalitiesordoubtontheircondition(bothavailablefromDieselDistributors).
Inspectball,seatandshank
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ValveSeatandRetainingNut
Figure16
Inspectthevalveseatforerosionandwear(Fig16).Aswiththeballandvalveassembly,thisisprobablybestviewedunderamicroscopeorothermagnificationequipment.Ifthereareanymarksacrosstheseatingareathatwouldsuggestasealingproblemrenewthevalveseat(availablethroughDieselDistributors).
Inspectthesealingfaceoftheretainingnutforsignsoferosionandwear(Fig16).
DuetotheveryfinetolerancesinvolvedinCRinjectors,lappingofthesealingsurfacesofthesecomponentsisnotrecommended.AnyattempttolapthesurfacesshouldbeundertakenwiththeutmostcareandwiththeuseofVERYFINElappingpastes.
Inspectallsurfacesforerosion&wear
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CommandPiston&InjectorBody
Figure17
Checkthepistonforscoringandwearmarksalongwiththeinnerboreoftheinjector.Ifthereisconsideredtobeexcessivescoringorwearoneithercomponent,thentheunitwillmorethanlikelybescrapped(Fig17).Thepistonshouldbeclean,freefromscoringandmovefreelyinsidetheinjectorborewithnosnaggingortightspots.
NozzleAssembly,PressureSpindleandSpring.
Guidelinesforinspectingthenozzleassemblycanbeconsideredthesameasforanyconventionalnozzle.Checkforexcessivewearorscoringontheneedleshankandseatandrenewthenozzleifnecessary.(GenuineandnongenuinenozzlesareavailablefromDieselDistributors,dependinguponapplicationandavailability).
Checkthespringforconditionandthespindleforexcessivewearonthespringseat.
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ReAssemblyWhenreassemblinganycommonrailcomponents,cleanpracticesshouldalwaysbeobservedandtheutmostprecautionshouldbetakentoavoidanycontaminationofthecomponentsbeforeandduringassembly.
WARNINGThetorquevaluesmentionedinthefollowingprocedureareaSUGGESTEDVALUEbaseduponourexperienceandNOTDensospecification.
STEP1.2ValveSeatAssembly
Figure18 Figure19 Figure20
Mounttheinjectorintheholdingjigandplacethe2locatingdowelsintotheirboresonthetopfaceoftheinjector(thesedowelsarelargerinlengthanddiametertothenozzlelocatingdowels).Ensurethatthevalveseatisthecorrectwayroundbeforeinsertingitintotheinjector.Theboreontheundersideofthevalveneedstobealignedwiththeboreholeontheinjectorface(Fig18&19).
Usingthe3prongedsocket,insertandhandtightentheretainingnutintotheinjectorwiththesealingfacetowardsthevalve.Screwtheguideoverthesocket,ensuringthatthesocketcanstillmove,butwithmaximumsupportfromtheguideandtightento7075NM(Fig20).
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STEP2.2Solenoid&SolenoidValveAssembly
Figure21 Figure22
Fitthehalfballvalveintothesolenoidvalvestemandensurethattheflatfaceofthehalfballvalveisvisibleandlevelwiththestem.DONOTINSERTTHEVALVESTEMINTOTHEVALVESEATIFYOUCANSEETHESPHERICALPARTOFTHEHALFBALLVALVE(Fig22).ITMUSTBETHEFLATSIDE(Fig21).
Figure23 Figure24 Figure25
Thehalfballvalveshouldstayinthevalvestemwhenturnedoverandinsertedonthevalveseat.Oncethevalvestemisinpositionensureitisfreebyrotatingit(Fig23).
Placethefuelcalibrationshimontopoftheinjector(Fig24).
Next,insertthesolenoidspringshimandsolenoidspringintothesolenoidandcarefullyfitthesolenoidontotheinjector,ensuringthatthespringseatsinthecentreofthevalveandhandtighten.Oncehandtight,tensionthesolenoidassemblyto1012NM(Fig25).OVERTIGHTENINGOFTHESOLENOIDASSEMBLYCANHAVEANADVERSEAFFECTONTHEOPERATIONOFTHEINJECTORANDMAYRESULTINDAMAGETOTHESOLENOID.
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STEP3.2NozzleandCapNutAssembly
Figure26 Figure27 Figure28
Repositiontheinjectorassemblyinthejigwiththesolenoidtowardsthebottom.
Insertthecommandpistonintotheinjectorbodywiththemainshankmachinedwithgroovestowardsthesolenoidend(Fig26).
Nextinsertthenozzleopeningpressureshimandthespringintothecentralinjectorboreandtheninsertthepressurespindleontopofthespringwiththesmallerdiameterfacingthenozzleneedle(Fig27.)
Insertthelocatingdowelsintothesealingfaceandplacetheinjectoroverthem.Placethe(new)capnutoverthenozzleandscrewdownuntilhandtight(Fig28).
Ideallysomekindofinjectorclampingrigshouldbeusedtounsurealignmentofthenozzle,ifyoucanfindsomethingormanufactureanythingsuitabletoholdthebody.Thearrangementpicturedbelow(Fig29)featurestheStanadyneInjectorAligningTool(Part#29617).Aninjectoraligningtoolwasnotusedinthisexerciseandnooperationalproblemswereexperienced,howeveritwouldbebettertouseoneifavailabletominimisetheriskofmisalignmentorbreakingthedowelpins.
Figure29
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TestingAlltestingoftheDensoCRinjectorsusedtoobtaintheinformationgivenherewascompletedusingtheHartidgeCRIPCandtheIFT70.(bothavailablefromDieselDistributors)
WhentestingDensoCommonRailinjectorsthefollowingelementsshouldbeobservedtoevaluateanddeterminethefunctionalityandconditionoftheinjector:
1Nozzleopeningpressure 2InjectorResponseTime 3FuelDelivery 4Backleakage 5Backleakagetemperature
Eachoftheabovewillbediscussedinmoredetailinthefollowingguidewhichhopestoprovideanunderstandingofwhateffectalteringtheshimadjustmenthasontheinjectorsperformance.
1. NozzleNeedleopeningpressureThiscanbesetbytheshimthatsitsbehindthenozzlespring.ThenozzleopeningpressuresettingonaG2injectorwillhaveaneffectonfueldeliveryandResponseTime(seefurtherdowninsection2fordefinition)particularlyatlowerenginespeedsandrailpressures.Iftheopeningpressureissettoolow,theidledeliveryandpreinjectionwillincrease.Iftheopeningpressureissettoohightheidleandpreinjectionwilldecreaseandresponsetimewillincrease.Fuellingandresponsetimeatmainfuellingsettingswillremainlargelyunaffected.WecansettheopeningpressurewiththeuseofaHartridgeIFT70injectorfunctiontesterthatcanactuatethesolenoidwhilsttheusercanobservethespraypatternandcontroltherailorfeedpressure.ThisexercisecouldpossiblybeperformedwithaconventionalinjectortesterandamultifunctionCRinjectortriggerboxsuchastheIFTC(availablefromDieselDistributors).THISTESTSHOULDBECARRIEDOUTANDSET(IFNECESSARY)BEFOREANYFLOWTESTINGOFTHEINJECTOR.
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Mounttheinjectorintothemachineandconnectthehighpressurepipeandappropriateelectricalconnector.
Figure30 Figure31
Usingalargepulsewidthofaround2.5m/sandlowinjectionspeedofsay100injectionsperminute(IPM)(Fig30).Setthefeed(railpressure)tozeroandgraduallyincreaseuntilthefuelcanbeseentoinject.Atthispointtakenoteofthepressureonthegaugeatwhichinjectionstartedtotakeplace.(Fig31).
TheopeningpressureontheparticularDensoinjectortestedwasapproximately130140bar.Thisfiguremaydifferdependinguponinjectorpartnumber.Itwillbeuptotheusertogainsomespecificationsfromnewinjectors.
Ifthepressureneedstobeadjusted,thentheopeningpressureshimwillneedtobechangedtoincreaseordecreasespringtensionaccordingly.Sincethenozzlecapnutwillnothavebeenputintoservicethelooseningandretensioningshouldnotcauseanyissuesandshouldbeabletobereusedafterremoval.
AcheckofthespraypatternandgeneraloperationoftheinjectorcanthenbeperformedwhilststillmountedontheIFT70aftertheopeningpressurehasbeenchecked.Asageneralrulethereshouldbenomorethan3040%backleakagedeliverycomparedwithfueldeliveryonfullloadsettings(e.g.500bar1200PPM1.2m/spulsewidthwhenusingtheIFT70).
Iftheinjectorisfunctioningproperlywithbasicdelivery,backleakageandspraypatternallsatisfactory,theinjectorcanbeflowedmoreaccuratelywiththeHartridgeCRIPCorAVM2withCRinjectorallmakescapableofcheckingfueldelivery,backleakageandresponsetimeathighpressures(1600bar+).
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2. ResponseTimeSimplyexplainedthisisthetimetakenfromwhentheECUsendsasignal(current)totheinjectortowhentheactualinjectiontakesplace.Itisanimportantfactorindeterminingtheconditionoftheinjector.Ingeneralincreasedresponsetimepointstowardsapoorlyfunctioninginjector.Onvehicleeffectsofpoorresponsetimecanshowaswhitesmoke,roughrunning,idlingproblems,detonation(knocking)andpoorperformance.InjectorresponsetimeisanimportantfactorfortheECUtobeabletocompensatedrivepulseforrecalculatingfuelquantitiesforonvehiclelearningofQRcodes.Responsetimecanbeaffectedbyopeningpressure,commandpistoncondition,nozzlecondition,solenoidvalveconditionandsolenoidefficiency.Anythingthatcaneffectivelyslowdowntheoperationoftheinjectorwillresultinincreasedresponsetime.Ifresponsetimecanbereadandseenthenaclearerpicturecanbegainedfromtheinjectortestonthegeneralconditionoftheinjector,asopposedtoonlyrelyinguponmeasuringdeliveryandbackleakage.Itcanbeconsideredimportantinourdiagnosisofinjectorcondition.Itcanbeaffectedbychangingfuellingshimsandopeningpressure.TypicalresponsetimesrecordedfortheDensoinjectorstestedwereintheregionof430490sforhigherpulsewidthandpressuresettings(fullandmidloadscenario).Responsetimewillgenerallyincreaseatidleandlowerpulsewidthsandpressures(idle,partloadandpreinjection).Typicalidleresponsetimesmaybearound490560s.Again,theabovefiguresarebaseduponthetestingofcertainDensoinjectorsandtogainamorethoroughunderstandingofinjectorspecificresponsetimefigures,newinjectorswouldneedtobetestedandresultsrecorded.
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3. FuelDelivery
AftertheopeningpressurehasbeensetandtheinjectorhasbeentestedforbasicfunctionitcanthenbeproperlyflowedforamoreindepthtestontheHartridgeAVM2PCwithinjectorallmakeskitortheHartridgeCRIPC.
Theinjectorneedstobegivenatestplanofsettingsfromwhichtheresultscanberecorded.Thesevaryingsettingsshouldputtheinjectorthroughdifferingtestsituationsthatwouldbestsimulatevariousengineconditions.Anexampleofthesetestconditionshasbeenincludedbelowforreference:(Fig32).
Figure31TestPlanExample
Onceasetoftestsorconditionshavebeendecidedupon,theycanthenbeusedasagenerictestplanforalmostallinjectors.Thetestplanisthenusedtorecordtheresultsfromnewinjectorsandusedforcomparisonagainstusedorrepairedunits.Adatabaseofresultscanbebuiltupandtolerancescanevenbeformedbytestingmultiplenewunitsandtakingaveragereadings,fromwhichtolerancebandscanbedecided.
IftheflowresultsfromausedorrepairedinjectoraredeemedtobeoutofspecwhencomparedtoatestresultfromanewinjectorthenthefueldeliverycanbealteredbychangingtheCalibrationShimwhichsitsinbetweenthesolenoidandtheinjectorbody.CHANGINGTHISSHIMWILLHAVEANEFFECTONTHEOVERALLFUELDELIVERYOFTHEINJECTOR.
ToINCREASEthefuellingaTHICKERshimmustbefitted
ToDECREASEthefuellingaSMALLERshimmustbefitted.
TOYOTA236700L090BEFOREADJUSTMENTInjector#
Pressure(bar) SpeedPulsewidth(s)
Deliveryml/st
BackLeakml/st
Response(s) ReturnTempC
Idle400 350 750 12.4 14.9 489 39MidRange1000 800 800 49.3 22.8 432 40FullLoad1600 1500 1000 95.2 33.8 418 50StaticLeak1600 1000 0 0 0 0 52PreInjection600 1000 500 9 14.7 452 49MidRange800 1200 800 39.9 19.6 446 51Start950 150 1000 64.2 105.6 551 48
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0.1mmdifferenceinshimsizewillequatetoanapproximate7%changeinfuellingacrossthewholerangeoftheinjector.However,theresponsetimewillalsochangeaswehaveeffectivelychangedthetotaldistancethatthesolenoidvalvehastotravel.Inanefforttocounteracttheresultingresponsetimechange,thesolenoidspringshimcanbechangedtotryandlimittheresultingdifferenceinresponsetime.Althoughadifferenceinresponsetimeisseenwhenthesolenoidspringshimischanged,itisminimalanddoesnotreturntotheoriginalresultsafteramaincalibrationshimalteration.
Itwouldthereforebeprudenttomakeonlysmallalterationstothecalibrationsettingwhenconsideringanychangestothefuellingoftheinjector.
Changingthesolenoidspringshimwillalsoaffectfueldeliveryaswellasresponsetime,aswearereducingorincreasingspringtensiononthesolenoidvalve,makingiteasierorharderforthesolenoidtopullupthevalve.Again,considertheeffectstothefuellingthroughouttherangewhenattemptinganyshimadjustment.
4Backleakage&BackleakTemperature
TheamountofbackleakagefuelthataCRinjectorproducesisanindicatoroftheinternalsealingandconditionoftheinjector.Anyproblemswiththesealingofthesolenoidvalveorthenozzleneedlewillshowupashighbackleakage.Usually,ifhighbackleakageisexperienceditwillbeseenineverytestandcanindicatevalveseatproblems,solenoidvalveproblemsandnozzlesealingorwearissues.
Backleakagetemperatureisalsoworthmonitoring,asanyexcessiveleakageofhighpressurefuelwithintheinjectorwillcausethetemperatureofthebackleakagetorise.Thisisbecausethehighpressurefuelcreatedintherailisalothighertemperaturethanthelowerpressureofthebackleakage,thereforeanyexcessiveriseinbackleakedfuelwillshowupasahighbackleaktemperature.
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CorrectionCoding&BatchingCRinjectorcorrectioncodingisimportantandallowstheCRsystemasawholetocompensateformechanicalandhydraulictoleranceswithintheinjector.NotwoinjectorswillnaturallyflowthesameandthevehicleECUcancompensateforthisbyalteringthepulsewidthtoindividualinjectorswhenthecorrectioncodegiventotheinjectorduringmanufactureisprogrammedintotheECU.
Wecannotproducethiscodewithconventionalallmakesequipment.ItrequiresaconsiderableinvestmentandOEMbackingtodoso.
Onemethodoftryingtolimittheproblemofourinabilitytoproduceanindividualcorrectioncodeistobatchinjectors.Thismethodinvolvesflowtestingandadjustingthefueldeliveryoninjectorssothatthedifferencesbetweenthemareminimal.Sayforinstancewehadaround30injectorsthatwererepairedandflowtested.Thebatchingconceptassumesthatoutofthose30injectorstherewouldbesetsthatwoulddisplaysimilarflowandresponsecharacteristics.Theseinjectorscouldthenbefurtherfinetunedwithminoradjustmenttomakethemassimilartoeachotheraspossible.
Setsof4or6injectorsarethensoldorfittedtogethertominimiseanymajordifferencesinflow.
Anotherconceptistobuildlengthydatabaseontheflowratesofdifferingnewinjectorsfromsamepartnumberfamilybyrecordingtheirflowandresponsecharacteristicsandthecodeonthatparticularinjector.Overtimeadatabasecanbebuiltandanyfutureinjectorsthatdisplayedsimilarresultstoapreviouslyrecordedunitwouldbegiventhecodefromthatsimilarflowingnewinjector.Thiswouldbealongandcomplicatedprocess,butnotimpossible.
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SUMMARY
Thereareparts,testequipmentandtoolingavailablethroughDieselDistributorstoserviceandtestDensoCRinjectors.Thereisnoconcretesetofinstructionsortestdatatoproduceaperfectlyrepairedproduct.Thereishowever,anopeningtobeabletooffersomethingmorethanjustanewunitinbox.
Therepairconceptofferedhereistoenabletheusertheabilitytolearnasyougoandbaserepairsondataobtainedfromnewunits.
Hopefully,theinformationinthisdocumentisenoughtogetyoustarted.
Forfurtherinformationpleasecontact:
DieselDistributorsAustraliaPeterHunterpeterh@ddal.com.au
DieselDistributorsNewZealandKevinMorriskevin@dieseld.co.nz
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