A Newsletter of the Musik-Stadt Porsche Club. June 2010! Solid Gold

Transcription

1 A Newsletter of the Musik-Stadt Porsche Club June 2010 Solid Gold

2 In the driver s seat withfrankhodges,president GoMusik"Stadt IhopeeveryonehashadagreatMemorialDayholiday. SummerisofficiallyherewhichmeansPorscheactivitiesare infullswing.mayhasbeenaninterestingmonthwithallof therainwereceived.itrusteveryoneweatheredthestorm floodwithoutincident.thenthefollowingweekend,our planneddaydrivetojackdanielswasalsocanceleddueto inclimateweather.wenowhaveanewdateforthejack Danielsdrive Sunday13June.WemeetatSteakNShake onhighway96infranklin.i msureagoodtimewashadby allwhoattendedthetntubsbbqandpeoplechoice ConcoursatCalTurner sfarm.unfortunately,iwasnotable toattendduetoconflicts,howeverthephotosofthecarson displaywerejustincredible. CongratulationstoDarioFranchittionwinninghis2 nd Indianapolis500. Juneislookingtobeverypromising.AsImentionedabove we lldrivethemake"updateforthejackdanielstours.we arealsoverypleasedtoaddtherestaurant Alliumtoour clubmeetinglocationsthismonth.therestauranthasfree coveredparkingbelowaswellastremendousviewsof downtown.andcertainlytherestauranthasawide selectionofgreatfood. IfitsJuneitmustbetimeforthe24heuresduMansatthe Sarth.Porschewillhaveastronglineupthisyear.TheRS Spyderswillreturnintheprototypeclass.Andofcourse PorschewillraceingreenstylewiththeallnewGT3R Hybrid. Ihopeeveryonehasagreatsummer.Wehaveagreat collectionofactivitiesplanned.seeyousoon. Cheers, Frank MONTHLY MEETING June 08, :30 pm Allium, East Nashville (615) Main Street Musik-Stadt Officers: President Frank Hodges president@musikstadtpca.org Tel Vice-President Paul Jones vicepresident@musikstadtpca.org Tel Secretary Jud Scott secretary@musikstadtpca.org Tel Treasurer Vic Davis treasurer@musikstadtpca.org Tel Membership William (Bill) Wright membership@musikstadtpca.org Tel Driving Events driving@musikstadtpca.org Newsletter Editor, Solid Gold Greg Gratkowski editor@musikstadtpca.org Tel Dealer Liaison Mike Gillespie dealerliason@musikstadtpca.org Activities Chair Michele Hodges activities@musikstadtpca.org

3 2010 Musik Stadt Calendar of Events (will be updated as event information becomes available. Check the Musik Stadt website for more frequent updates) Monthlymeeting Allium,EastNashville6:30pm MusikStadtRegion DayDrivetoJackDaniel s DepartfromSteaknShake MusikStadtRegion HWY96Franklin,TN10:00AM " AlabamaDE BarberMotorsports AlabamaRegion "07.09"10 PorscheParade Springfield,IL National Monthlymeeting PorscheofNashville6:30pm MusikStadtRegion KeenelandConcours LexingtonKY Featuredmarquee:Ferrari Monthlymeeting GerstHaus MusikStadtRegion Boardmeeting(8:00am) BobEvans MusikStadtRegion Opryland " Tentative Rennfest Georgia PeachstateRegion Monthlymeeting ElMariachi,ThompsonLane MusikStadtRegion Monthlymeeting TBD MusikStadtRegion Planningmeeting Corky s,brentwood opento MusikStadtRegion (11:00am) all Monthlymeeting TBD MusikStadtRegion Boardmeeting(6:00pm) Darfon s,donelson MusikStadtRegion "11.28"10 NashvilleMotorTrendAuto NashvilleConventionCenter Show December Nomeeting Plannedeventsduring2010: Daydrives JackDaniels Spring(RescheduledforSundayJune13.) BlueHeronRiverboat Fall Techsessions Welder sshopinfranklin mid"year CarlGeorgegarage fall

4 MembershipUpdate Primary Members 298 Affiliate Members 201 Total Members 499 New Members: Kyle & Diane Callahan James & JoAnn Collins Gallatin James & Mack Flatt Franklin Henry Mannle 08 Cayman Steve Olesky Transfers In: None this month Member Anniversaries: Frank Jacobs 25 yrs. John Ferebee 5 yrs. Michael Walker 5 yrs. "#$%&'(#%)%$"*#%+,%-.-*%/+0-%$+#% ()'1-2% 3$-%4+0(1$-%50"."*6%-78-0"-*1-9%5"(#"::-5%#+%"#(%8'0-(#%,+0/2% ;*#0+5'1"*6%#$-%*-<%=>??%@+7(#-0%A8B5-02%C%(B/D+:% +,%0-:-*#:-((:B%'*1+/80+/"("*6%4+0(1$-%-*6"*--0"*69% #$-%A8B5-0%($-5%+.-0%?E>%:D(%"*%#$-%*)/-%+,%)6":"#B% <$":-%6)"*"*6%?>%$+0(-(%"*%#$-%*)/-%+,%,+01-2%3$-% 0-(':#%"(%)%8'0-9%'*5":'#-5%0+)5(#-02%4-0,-1#:B% 1):"D0)#-5%#+%5-:".-0%)(%#$0"::"*6:B%8'0-%)*5%."(1-0):%)% To view and update your PCA membership record, including address, phone, , and car information, login to PCA.org and go to: Membership > Member Record. Changes you make on PCA.org are immediately active in your membership record, and are sent to your local Region at the end of each month. Edit the information by clicking the pencil icon, then make your changes and click Save to update your PCA Membership Account 50"."*6%-78-0"-*1-%)(%)*B%)50-*):"*-F$'*60B%50".-0% 1+':5%<"($%,+02%A+%1+/-%"*%,+0%)%#-(#%50".-%#+%(--%$+<% :-((%1)*%#0':B%0-(':#%"*%(+%/'1$%/+0-2% 4+0(1$-2%3$-0-%"(%*+% ('D(#"#'#-2% 4+0(1$-%+,%G)($."::-% =HI>%J0)*K:"*%4"K-% G)($."::-9%3G%HE=>L% MN?IO%HPIF?Q>>% <<<24+0(1$-+,G)($."::-21+/% A$+<0++/%$+'0(%R%S%J%QCR%S%E4R% A)#%QCR%S%N4R%%%%% T78-0"-*1-%+'0%:-)*-(#9%/+(#%8+#-*#% 0+)5(#-0%-.-02%3$-%@+7(#-0%A8B5-02

5 Kars4Kids2010 Kars4kidsisalocaleventheldthethird SaturdayofAprileachyeartohelpsupport thebaptistchildren shomeinbrentwood TN. Theweatherandturnoutforthisyear s eventwasgreat.everythingfromvintage automobilesfromthe1920 stoferrari sand ofcourseporsche s. Thereisplentyofmusic,food,doorprizes, trophiesandfamilyfunatthisevent.mark yourcalendarfornextyear seventandhelp supportthebaptistchildren shome. FerrariTestarossa Porschesrestingonthelawn

6 Calendar year 2010 Cars & Coffee schedule Onthe2 nd and4 th Saturdayofeachmonth,agroupofcarenthusiastsmeetinCoolSpringsfor Carsand Coffee. March:1327 April:1024 May:822 June:1226 July:1024 August:1428 September:1125 October:923 November:13 Times:7:30am 9:00am(oruntilthelastcarleaves) Location:NeartheCarrabba sparkinglot Franklin(intersectionofMalloryLane&Cool SpringsBlvd) Coffee:ThereisaStarbucks&AtlantaBreadCompanywithinwalkingdistance. Directions:FromI"65southtakeexit68rightontoCoolSpringsBlvd.thencrossoverMalloryLane.Takethe firstrightaftermallorylaneintothestarbucksparkingarea.gatheringisjustbeyondthecarraba sparking area.fromi"65northtakeexit68leftontocoolspringsblvd.thencrossovermallorylane.takethefirst rightaftermallorylaneintothestarbucksparkingarea.gatheringisjustbeyondthecarraba sparkingarea. FromI"65northtakeCarrabba srestaurantparkinglot553coolspringsblvd.franklin,tn37067

7 forsale 3.6liter,430HP SixSpeed,SpeedYellow BlackLeather Originalowner 11,500miles 11months 36,000milesleftonwarrantyAskingPrice$91,000 Excellent Condition, $83,000ifyoudon twantspecificupgrades*newtires,and NoServiceRequiredfor1year. Originalstickerprice"$112,000,havemadeapproximately $18,000ofaftermarketupgrades

8 2010 Featured Marque is Ferrari NEW DATES FOR 2010 JULY 15, 16, 17, 18 CONCOURS ON SATURDAY JULY 17 LEXINGTON, KENTUCKY Watch the WKYT -TV Keeneland Concours Show click here Selected as a Kentucky TOP TEN EVENT for the second consecutive year Keeneland Concours d'elegance Now judged to be a top 20 events in the Southeast for the fourth consecutive year ForWrencher sonly Dedicatedtoenthusiastswithadoityourselfattitude

9 Wally Plumley 928 Specialists Thetoothedcamshaftdrivebelt,morecommonlyreferredtoasthetimingbelt,anditstensioner,makeuponeofthemost criticalofthe928 ssubsystems.thistoothedrubberandfabricbeltisresponsiblefordrivingthecamshafts(twocams, operatingsixteenvalves,upthroughmodelyear("my")1984forus"speccarsandmy1986foreuro"speccars;fourcams, operatingthirty"twovalves,forus"speccarsformy1985andlaterandall928sworldwidefrommy1987),thewaterpumpand theoilpump,andisoneofthelongesttimingbeltseverusedonaproductionautomobile. Whileatimingbeltfailureisseriousonany928,itcanbeadisasteronalatermodel.Atsomepoint,the928enginechanged froma"free"wheeling"toa"interference"or"valve"crash"design,butthereisnotuniversalagreementonexactlywhenthis changeoccurred.thismeansthatonallexcepttheearliesttwo"valvecars,timingbeltfailureorslippagecancausethepistons tohitthevalves,resultinginmajordamagetotheengine.atoothedbelttensionwarningsystem,whichcangiveearlywarning ofabeltproblem,wasaddedinmy1985. Thefactory"recommendedreplacementintervalforthetimingbeltis60,000miles,butmoreconservativeorpessimistic ownersoftenobserveshorterintervals,suchas40,000miles.thereisgeneralagreementthatageshouldalsobeafactor,with replacementsuggestedatnomorethaneveryfouryears,nomatterhowmuchorlittleyou vedriveninthattime.ifyoudon t knowwhenyourbeltwaslastreplaced,youshouldseriouslyconsiderreplacingit,especiallyona32"valveengine.youshould alsooccasionallypulloffanairtubeandvisuallyinspectthebeltatidle(my1986anduponly). Replacingthetimingbeltiswithinthecapabilitiesofacompetent"DIY"(doityourself)owner,butaccesstotheshopmanuals andsomespecialtoolsarerequired.typicalshopcostfortimingbeltandwaterpumpreplacementrunsfrom$500(all amountsinusdollars)to$1000,whilethediycostshouldrunfrom$250to$300.thisarticlemerelygivessomehelpful informationnotfoundinthemanuals,anddoesnotbyitselffurnishsufficientinformationtoperformthereplacement operation.werecommendthatyoudonottrytoreplacethetimingbeltwithoutthemanualsandspecialtool. Therearemanythingsthatyoushouldcheckwhileyouareinthere("WYAIT").Thisisagoodtimetoinspectand,asneeded, replacetheaccessorydrivebelts.onthefour"camengines,takeaverycarefullookatthedistributorcapsandrotors.especially ifyouarepayingashoptoreplacethetimingbelt,giveveryseriousconsiderationtoreplacingthewaterpumpatthesame time.theextralaborchargeshouldbeminor,sinceremovingthebeltfullyexposesthewaterpump,whilereplacingthewater pumpalonerequiresremovalandreinstallationofthetimingbelt.thepumpshouldbeabout$125orsofromanindependent vendor,althoughashopwillusuallychargemore.thissmallinvestmentcouldhelpyouavoidaflatbedchargeandanexpensive repairbilllater. Checkthecrankpulleyseal,thecamshaftseals,andtheoilpumpsealforleakage.Thirty"two"valveengineshavecamsealing plugs(figure5)onthefrontendsofthesecondcams;theseoftenleak,andnowisthebesttimetoreplacethese.similar sealingplugsarealsoontherearendsofallcams,andareoftenresponsibleforoilleaksdownthebackoftheengine.theold" styleo"ringsealsarediscontinued.youcaneithertrytofindasuitableo"ringreplacement,orreplacetheplugsandtheir retainerswiththenewdesign.seeshopmanualpage15"120foranillustrationoftheoldstyle,and15"128aforthenewstyle.

10 Sinceyouwillbeworkingaround12voltdcconnectionsandremovingthealternator,itisagoodideatodisconnectthebattery groundstrap.keeptrackofthetimingcoverbolts,astheyarenotallthesame. Thetensioner(FIGURE1)deservesspecialmention.Thislittledeviceservestotensionthebelt,adjustingautomaticallyfor temperature,andhydraulicallydampensbeltvibrationsandfluctuations. Onthe32"valveengines,italsotriggersthebelttensionwarninglight(FIGURE2ANDFIGURE12).Thetensionershouldbe rebuilteverytimethatyoureplacethetimingbelt.thisisasimple,inexpensivejobthatcouldpaybigdividends.pages15"20 through15"25intheshopmanualshowthisoperation.oneofthetensionerboltsgoesintothewaterjacket,andcoolantwill drainoutwhenitisremoved,sothreadlockingcompoundisusedonthisboltduringreinstallation.observecarefullyandmake notesorphotosasyoudisassemblethetensionerarm(figure2),especiallythesequenceofspring,switchpieceandbushings onthe32"valveunits"thisisn tshowninthemanual

11 YouwillneedanO"ring(32"valveonly),arubberboot,abootclamp,andagasket.928Specialistsoffersarebuildkitforthe tensionerthatcontainsallneededparts.therubberboot(figure3)isoneofthemostcriticalparts.itgetsbrittlewithageand heat,andifitcracks,theoilleaksoutandthedampeningactionislost.onearliercars,pourthehousingalmostfullof90" weightgearoilbeforeinstallingtheboot.endnipperpliers(electricalcutterswiththebladesrunningacrosstheend)workwell totightenthebootclamp.becarefultokeepthegasket(figure4)frombendingorslipping"installationcanbealittletricky. Gluingthegaskettothetensionerhousinghelps.

12 Afterinstallation,atrigger"typeoilcanandapieceofplastichosehelpsgreatlyinrefillingthetensionerwith90"weightgearoil, usingthefillandbleedscrews(figure1).bepatientandholdpressureontheoiluntilthehousingisfull;theoilisthickand thehousingpassagesarecomplex.earliercarshaveplugsratherthanfill/bleedfittings,buttheirless"complexpassagesare easiertofill.notethatallillustrationsofthetensionerinthisarticleareofthelatertype. Thefollowingprocedureshouldbefollowedonanyenginethathasa45"degreemarkonthecrankpulley,andforcertainon any32"valveengineafterremovingthetoptimingbeltcovers,butbeforeremovingthecrankpulley,turntheengine(always inthenormalclockwisedirection)untilthetopdeadcentermarkonthecrankpulleyisalignedwiththepointer,andthe notchesonthebackofthecamshaftwheelsarealignedwiththedimplesinthebackingplates(figure5).notethatfigure5is atthe45"degreeposition,notthetopdeadcenterpositionthenturnthecrank17/8turns,aligningthe45"degreemarkwith

13 thepointer(figure6).carefullyaddanew45degreemark(figure5)toeachofthecamshaftpulleys,sothatyoucaninstall thebeltwiththeengineinthe45degreepositionlater. Thefirstspecialtoolsneededarea3/4"drivesocketandpullhandle,andtheflywheelstop(p/n9161toMY1982,p/n9161/1 formy1983andup).theflywheelstopcanberentedfromsomeofthe928vendors,butitissuchaninexpensivetoolthatyou probablywanttobuyit.whileyoumightgetthecrankpulleyboltoffwithoutthesetools,itistorquedto218lb"ft,anditwill takeconsiderablymoretorquetobreakitloose.wehavesnapped1/2"craftsmanpullhandles,extensions,andadapters trying,buta3/4"drivesocketandhandleworkedfine.theboltis27mm,buta11/6"socketalsofits.nopullershouldbe neededtoremovethepulley"justprygentlyandwriggle. Followthemanualandremovethecoversandthebelt.Checkforleaks,thencleanthearea.Remove,rebuild,andreinstallthe tensionerhousingasdetailedearlier.inspectallpulleysandsprocketsforwearordamage.checkthebearingsinthetimingbelt tensionerandidlerpulleys(figure2)verycarefully.thereshouldbenolooseness,grittiness,orroughness.checktheplastic bushingsinthetensionerarm(figure2)verycarefully,andreplacethemifthereareanysignsofwear.checktheboltfor wear(figure2).clean,lube,andpreparethetensionarmassemblyforreinstallation. Withthemarksthatyouadded(FIGURE5),youcaninstallthenewtimingbeltatthe45degreeposition.sincethisistheonly positionthatiscertaintoallowcamshaftmovementwithnodangerofvalvecrashing,andsincethecamswanttomove suddenlyandunexpectedly(duetovalvespringpressure),thisisthesafestpositionatwhichtoinstallthebelt.rememberthat allbeltslackshouldbeatthetensioner.stuffaragunderthecrankpulleytoholdthebeltonthepulleyandmakeinstallation muchlessfrustrating.pullthebelttightlyovertheoilpump,thenthedriver sside(forleft"handdrivecars)camsprocket,and applyaspringclamporclothespintoholditinplace. Goaroundthewaterpump,andpullthebelttightlyoverthepassenger sside(forleft"handdrivecars)camsprocket,applying anotherspringclamptoholditinplace.checkthecamtimingmarks.reinstallthetensionerarmandtensioner,andrunthe tensionerboltuptosnugthebelt.removeallragsandclamps,removetheflywheellock,andtemporarilyinstallthecrank pulley.turntheenginetotopdeadcenterandcheckalltimingmarks.rememberthatthecamtimingmarksareontheback sideofthecamsprockets"thesearetheonesthatyoucanseethroughtheairtubesonthemy1986andupengines.their

14 positionsareindicatedintheillustration,butyoucan tseethemarksfromthisangle(figure5).turntheenginetwoturns, andcheckalltimingmarks. Calibratethetensiontestertool(p/n9201)(FIGURE7),usingthecalibrationbar(FIGURE7)thatshouldaccompanyarental tool,orthatyoushouldhaveboughtwhenyouboughtthetool.thiswillgiveyouagoodfeelforhowthetoolworks(figure 8).Checktobesurethatthelockingpin(FIGURE9)smoothlyandeasilyentersitsholeintheslidinggaugepin.Thecalibration valueis4,andissetbyturningtheknurledcalibration"adjustingwheelbehindthedial(figure8).

15 Firstandmostimportantlyyouarereadingtheloosesideofthebelt.Thereareeithersixteenorthirty"twovalvespressingon thecamshaftlobes,witheachapplyingacoupleofhundredpoundsofspringpressureontosmooth,lubricatedinclinedplanes. Thispressuretriestomakethecamsrotate,whichwillchangethetensionreadingsthatyouget.Thismeansthatthefirst requirementforgettingrepeatablereadingsistoturntheengineinthedirectionofnormalrotation(always)untilitison topdeadcenter,firingposition.thatis,themarksonthecrankdamperandthecovershouldshowtopdeadcenter,andthe marksonthebacks(notthe45degreemarksthatyouadded)ofboththecamwheelsshouldbealignedwiththedimpleson theflanges.ifyouareevenalittlebitoff,itwillchangethereading,duetothevalvespringpressuresonthecams.youmust notbacktheengineup,evenatinybittoalignthemarks,asthiswillseriouslychangethetensionread Ifyougettheenginepositionpreciselyright,youwilldiscoverthattheteethonthebeltaretheninthesamepositioneach time.thisallowstheeliminationofanothervariable,thedistanceofabelttoothnotchfromthecampulley.therewillbe eitheroneortwonotcheswhereyoucanplacethetensiongaugeroller,andoneofthemwillbettercentertheslidinggauge pinonthepumpbracket(figure10).becertainthattheendofthegaugeneverhitsthelowerbeltcover,ifitisinstalled.

16 Pullthelockingpin,andgentlyturnthesmallknobinthecenterofthedialfacecounterclockwisesothatthemaxreadinghand isatoptheindicatorhand.putthetoolinplace,tryingtohitthesametoothvalleywiththeroundrollereachtime.asshownon page15"18cinthemanualandfigure11ofthisarticle,yousupportthedialendofthegaugewithyourleftthumbandindex finger,pressinguponlyenoughtosupporttheweightofthetool,andcarefullykeepingthetool sflatpaddles(slidingshoes) androller(figure8)paralleltothebelt. Pressdownontheslidinggaugepin(right)end(FIGURE9)ofthetoolwithyourrightindexfinger(FIGURE11),beingcarefulto avoidtippingortwistingthetool,untilthelockingpinslipsintoitsholeintheslidinggaugepin.donotpressdownfurtheron thegaugeafterthelockingpinslipsintoitsholereadthevalueonthedial.youcanthenturnthemaxreadinghand counterclockwisewiththecentralknobuntilittouchestheindicatorhand,pullthelockingpin,andcarefullyremovethetoolso thatyoucanmoreeasilyreadthemaxreadingindicator,butthein"placereadingseemsmoretrustworthy.the16"valve modelsshouldbesetto4.5,whilethe32"valvemodelsshouldbesetto5.0"5.3. Rotatetheenginetwoturns(torunallvalvesthroughonefullcycle),andrepeatthemeasurement.Youshouldbeabletoget veryrepeatablereadings,andevensmalladjustmentstothetensionerboltshouldmakeanoticeabledifferenceinthetension. Checkalltimingmarksonemoretime. Reassembletheengine.Checktheelectricalconnections(FIGURE12)onthe32"valveunits,slightlybendingtheconnectorsas necessarytoensuregoodcontact.iftheseconnectionsareloose,youwillgetintermittentfalsebelttensionwarnings.usethe tensioningtooltosetthetensiononthetoothedalternatorbelt(my1982andup)to9.2onanewbeltor8.4to9.2onaused belt(whichwillbemuchtighterthanyouwouldhavethought). Thetimingbeltmustberetensionedafteritisbrokenin.Theshopmanualsaystoretensionafter1000km,butaslipincluded withyourbeltwillprobablygivealongerperiod,suchas2000miles.muchlessdisassemblyisneededtocheckthetension,as onlythetoppassengerside(forleft"handdrivecars)covermustberemoved. Thereisalotofunderstandableconcernoverthedurabilityandreliabilityofthe928timingbeltandtensionersystem.Ifthe systemisproperlyinstalledandmaintained,itisaveryreliable,durablesystem.whilerandommechanicalfailurescananddo

17 occuronanycomplex,highlystressedsystem,knowingthatthetimingbeltandtensionersystemiscorrectlyinstalledand adjustedwillmakethosehigh"rpmblastsalotmorecomfortable THEAUTHOR WallyPlumleyisaretiredaerospaceengineer,nowworkingwithDavidandJeannieRobertsat928Specialists.Hehasbeen involvedwithsportsandracingcarssince1960,building,crewing,ordrivinginmanyoftheracingorganizations.in1991, Wally setthreeworldspeedrecordsbonnevilleinacarofh isowndesign.his sishisfirstgermancar,andhereportsthatit isverydifferentfromhisbritishcars.wallyesp eciallyenjoysexploringthemoretechnicalaspectsof928maintenance. TH E 928 TIMING BELT/ TENSIONER SYSTEM Wally Plumley 928 Specialists