CorvAircraft> rear covers and distributors

[AVLEC]

Thanks for the info Mark J. I will do a thorough inspection of the rear case
when the time comes. I must first order the green "65 shop manual for the
motor before I go stripping things.
Regards
Dene Collett
KR2SRT builder
South africa
Whisper assembler
See: www.whisperaircraft.com
mailto: avlec at telkomsa.net
----- Original Message -----
From: "Mark Jones" <flykr2s at wi.rr.com>
To: "Corvair engines for homebuilt aircraft" <corvaircraft at mylist.net>
Sent: Saturday, January 06, 2007 23:37
Subject: Re: CorvAircraft> rear covers and distributors


> ----- Original Message -----
> From: "AVLEC" <avlec at telkomsa.net>
>
>
> >Can you tell me exactly what the problem was?
>
> Yep, I installed a high volume oil pump in place of the standard oil pump.
I
> did not clearance the cover of the pump properly and the gears were
dragging
> on the steel cover. You could actually see where they were machining
> themselves into the cover. When I turned the pump by hand prior to
> installing the distributor, it turned freely. However, I speculate as it
> heated up and filled with hot oil it expanded just enough to drag on the
> steel cover. This in turn put undue stress on the shaft of the distributor
> causing the shaft to wear at the top bushing. The shaft actually became
> elliptical in the area where it rides in the bushing. This allowed the
shaft
> to wobble in the distributor housing which disturbed the gap on the points
> causing intermediate hiccups. So, I replaced the distributor and oil pump
> along with a new rear case. The reasoning for replacing the rear casr was
> precautionary just in case it to had been damaged where the lower part of
> the distributor shaft rides in the case.
>
> Mark Jones (N886MJ)
> Wales, WI
> Visit my web site: www.flykr2s.com
> E-mail: flykr2s at wi.rr.com
>
>
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