Engine Break In

Home>TechnicalArticles>HowToBreak-inYourNewlyBuiltEnginev1. Home>TechnicalArticles>HowToBreak-inYo urNewlyBuiltEnginev1.03 03 HowToBreak-inYourNewlyBuiltEnginev1.03

HowToBreak-inYourNewlyBuiltEnginev1.03 »Makesurethatallengineassemblyisperformedinaclean,contamina »Makesurethatallengineassemblyisperfor medinaclean,contaminantfree,an ntfree,an dconditioned(temperatureandhumiditycontro dconditioned(tempera tureandhumiditycontrolled)environment.Allen lled)environment.Allenginehard ginehard waremustbeperfectlyclean,freeofcontamin waremustbeperfectly clean,freeofcontaminants,andproperlylubric ants,andproperlylubricatedprio atedprio rtoinstallation.Verifythatallintakeplum rtoinstallation.Ver ifythatallintakeplumbingiscleanandfreeof bingiscleanandfreeofdebris. debris. »Checkthatalloftheproperfluidsareattheproperlevelsinthep »Checkthatalloftheproperfluidsareatt heproperlevelsintheproperareas roperareas oftheengine,especiallyengineoilandfilter. »Verifythatthetimingbelthasbeenproperlyinstalledandthecamsh »Verifythatthetimingbelthasbeenproperl yinstalledandthecamshafts/camsha afts/camsha ftgearsareproperlytimed. »Again,checkthatalloftheproperfluidsareattheproperlevelsi »Again,checkthatalloftheproperfluidsa reattheproperlevelsintheprope ntheprope rareasoftheengine,especiallyengineoilandfilter. »Removethesparkplugsanddisconnectthefuelinjectors,turnengine »Removethesparkplugsanddisconnectthefu elinjectors,turnengineover3-4t over3-4t imesfor20secondseachtimetobuildoilpre imesfor20secondsea chtimetobuildoilpressure.Ifyouhaveanoil ssure.Ifyouhaveanoilpressure pressure gaugeyoucanseethepressuregoupaftera gaugeyoucanseethe pressuregoupafterafewcranks,thisinsures fewcranks,thisinsuresyouhave youhave oilthroughouttheengineandperipherals(tur oilthroughouttheeng ineandperipherals(turbo,camshaftphasingmech bo,camshaftphasingmechanisms,e anisms,e tc.)priortostart-up.Youcanalsoremoveth tc.)priortostart-up .Youcanalsoremovetheoildrainlinefromthe eoildrainlinefromtheturbocha turbocha rgertomakesuretheturboisprimedwithoil rgertomakesurethe turboisprimedwithoilaswell.Ideally,youwi aswell.Ideally,youwillwantt llwantt oinstalltheoilpressuregaugeasfarfromt oinstalltheoilpres suregaugeasfarfromtheoilpumpaspossibles heoilpumpaspossiblesoyoucan oyoucan seeyouaregettingpressurizedengineoilin seeyouaregettingp ressurizedengineoilineverypartoftheengine everypartoftheengine. . »Installsparkplugs,starttheengineup(onaknown,goodECUcalibr »Installsparkplugs,starttheengineup(on aknown,goodECUcalibration)with ation)with morepeoplethanyouneed...havethemwatchu morepeoplethanyou need...havethemwatchundervehicle,inengineb ndervehicle,inenginebay,oute ay,oute xhaustetc.listeningformechanicalnoisesan xhaustetc.listening formechanicalnoisesandwatchingforobviousfl dwatchingforobviousfluidleaks uidleaks . »Watchoilpressuregaugethewholetime,keepaneyeontheenginewa »Watchoilpressuregaugethewholetime,kee paneyeontheenginewatchingfor tchingfor anyfluidleaks.Allowtheenginetocometot anyfluidleaks.Allow theenginetocometotemperature(coolant)and emperature(coolant)andwatchoil watchoil pressuretocomedowntoastablelevelatid pressuretocomedown toastablelevelatidle.Thiswillhappenafte le.ThiswillhappenaftertheRPM rtheRPM comedownfromcoldstartandtheoilthinso comedownfromcolds tartandtheoilthinsoutfromtheheat. utfromtheheat. »Easilydrivetheenginearound(onaknown,goodECUcalibration)for »Easilydrivetheenginearound(onaknown, goodECUcalibration)for50-100mil 50-100mil esthenchangeengineoilandfilter.Doyour esthenchangeengine oilandfilter.DoyourbestvarytheengineRPM bestvarytheengineRPManddecel anddecel eratetheengineundervacuumasfrequentlyas eratetheengineunder vacuumasfrequentlyasyouacceleratetheengin youacceleratetheengine,youwa e,youwa ntyourenginetobreak-inevenly.Thefilter ntyourenginetobrea k-inevenly.Thefilteriscriticaltoreplacesi iscriticaltoreplacesinceitis nceitis goingtocontainseveralthousandsofparticl goingtocontainseve ralthousandsofparticlesofmetalandcoatingp esofmetalandcoatingparticulat articulat esfromthering/cylinderwallandbearing/fri esfromthering/cylin derwallandbearing/frictionsurfacebreak-in.T ctionsurfacebreak-in.Taketheo aketheo ilpanoutinbroaddaylightandlookforag ilpanoutinbroadda ylightandlookforaglitterymaterialtobein litterymaterialtobeintheoil theoil (makesuretheoilcontainerisabsolutelycle (makesuretheoilcon tainerisabsolutelycleanpriortoallowingthe anpriortoallowingtheengineoi engineoi ltodrainintothecontainer).Nolargedebri ltodrainintotheco ntainer).Nolargedebrisshouldbepresentinth sshouldbepresentintheoil.Ne eoil.Ne verusesyntheticengineoilduringthisproce verusesyntheticengi neoilduringthisprocess,useastraightweight ss,useastraightweight,non-syn ,non-syn thetic,non-detergentengineoil.Youwantfri thetic,non-detergent engineoil.Youwantfrictionatthispoint;use ctionatthispoint;useanSAE30 anSAE30 oil,non-synthetic,nodetergents,etc. 0-100miles,runengineverylightly,nomorethat1-2psiboost,nomo 0-100miles,runengineverylightly,nomore that1-2psiboost,nomorethan2 rethan2 8%TPSand3500RPM,changeengineoilandfil 8%TPSand3500RPM,c hangeengineoilandfilter.Doyourbesttovary ter.Doyourbesttovarytheengi theengi neRPManddeceleratetheengineundervacuum neRPManddecelerate theengineundervacuumasfrequentlyasyouacce asfrequentlyasyouaccelerateth lerateth eengine,youwantyourenginetobreak-inevenly.

100-500miles,runengineverylightly,nomorethat3-5psiboost,nomorethan 40%TPSand4500RPMChangeengineoilandfilter.Lookformoreglitterymater ialinoil.DoyourbesttovarytheengineRPManddeceleratetheengineunder vacuumasfrequentlyasyouacceleratetheengine;downshiftthevehicletocom etoastopratherthanusingjustthebrakes. 500-1000miles,runenginemoreaggressively,nomorethat6-8psiboost,nomor ethan50%TPSand5000RPMChangeengineoilandfilter.Lookforlessglittery materialinoil.Datalogtheengine,lookforknockevents,etc. Slowlyraisetherevlimitthroughoutbreak-inallthewaytoredlinejustafter 1000miles.PleasebesuretovarytheRPMrangethroughoutenginebreak-inyouw anttodowhatyoucantopromoteevenbreak-inoftheenginehardware.Ideally, theenginewilloptimallyperformthroughouttheRPMrange.Engineringsealing canbetestedthroughouttheenginebreak-inprocesswithacompressiongaugea ndcylinderleak-downtestkit(CLT);youcantestatTDCandBDC.Besuretope rformthesetestsonawarmmotorwiththethrottlebladefullyopen.Youwould wantyourmeasuredcompressiontobewithin20psiofeachotheronallcylinders andtheCLTto7%orlessacrossallcylinders.Wehopethishelps.