My 1835cc Hapi engine had the flywheel replaced when it had 500 hrs on it. The service bulletin which happened years before that I had not heard about,,,but when the alternator quit ,Steve Bennett at Great Plains recommended it replace the flywheel too. I did not know why until I pulled off the flywheel. All 4 dowel pins holes were SEVERELY ELONGATED and surely would have failed soon! In retrospect I was glad the alternator had failed and prevented the more extensive damage that would have occurred if I had not caught it when I did...
airgu...@comcast.net wrote: > Mine was bad after 50 hours. I bought the engine used with a log book. The > story goes that the KR was wrecked by a moving company. Sold for parts and I > got the engine. Tiny crack only found with die penetrant . Replaced with > Great Plains. > > > > Paul > > KR N7970K > > New Hampshire > > > > ----- Original Message ----- > From: " phil brookman " <pjb1234...@yahoo.co. uk > > To: " KRnet " < krnet @ mylist .net> > Sent: Sunday, November 29, 2009 7:26:50 PM GMT -05:00 US/Canada Eastern > Subject: Re: KR> HAPI Flywheels > > sure would like to hear all about those experiences with the hapi flywheels > ... > any chance of sharing > phill uk > > > > > ________________________________ > From: "JMelvin106@ aol .com" <JMelvin106@ aol .com> > To: krnet @ mylist .net > Sent: Wed, November 25, 2009 12:34:38 AM > Subject: Re: KR> HAPI Flywheels > > My experience with elongated dowel pin holes and cracked flywheels usually > stems from under torque on the flywheel retaining bolt and/or undersize > dowel pins. It is the only place on a VW that is safe to slightly exceed max > torque value but not more than 10%. > > John Melvin > El Paso > > > In a message dated 11/24/2009 8:02:18 A.M. Mountain Standard Time, > iflyavw @ msn .com writes: > > > To date we have replaced 107 HAPI aluminum flywheels in the last 28 years. > I would guess that 100 of them were 4 dowel versions. Most of the > builders caught the problem via the service bulletin. The flywheel will > start to > elongate in the dowel pins holes and eventually crack between the holes > which then lets the flywheel free spin so to speak. > > > > If memory serves, HAPI , the company was sold to Mosler Motors in 1988 -89 > ish . This company then became Total Engine Concepts. So it is likely that > many of the Mosler / TEC engines also had the acquired HAPI flywheel > inventory installed on their engines also. > > Steve Bennett > > iflyavw @ msn .com > > > > > _ ________________________________ ________________________________ > Windows 7: I wanted simpler, now it's simpler. I'm a rock star. > http :// www . microsoft .com/Windows/windows-7/default. aspx ?h= myidea ? > ocid =PID247 > 27::T: WLMTAGL :ON: WL :en-US: WWL_WIN_myidea :112009 > _ ________________________________ ______ > Search the KRnet Archives at http :// www . maddyhome .com/ krsrch /index. > jsp > to UNsubscribe from KRnet , send a message to KRnet -leave@ mylist .net > please see other KRnet info at http :// www . krnet .org/info. html > > _ ________________________________ ______ > Search the KRnet Archives at http :// www . maddyhome .com/ krsrch /index. > jsp > to UNsubscribe from KRnet , send a message to KRnet -leave@ mylist .net > please see other KRnet info at http :// www . krnet .org/info. html > > > > > _ ________________________________ ______ > Search the KRnet Archives at http :// www . maddyhome .com/ krsrch /index. > jsp > to UNsubscribe from KRnet , send a message to KRnet -leave@ mylist .net > please see other KRnet info at http :// www . krnet .org/info. html > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > >
