Dave,
I think either solution should be fine. First, I'd try the '69
alternator. If it hasn't been stored outdoors or in a bucket of water, time
should not harm it. If that doesn't work, replace the "drive end bearing". I
think it's pretty easy to get at, and not pressed into the front plate. (At
least, the 2000s are not, and their Mitsubishis, also.) I thought the
commutator end was just a bushing, but I'll check my parts book this evening
and get a better answer on both points.
Gary
________________________________
From: Dave Cooke <cookefam314@gmail.com>
To:
datsun-roadsters@autox.team.net
Sent: Monday, July 20, 2009 12:51:14 PM
Subject: [Roadsters] Alternator wobble
So, I noticed that my fan belt was a
bit loose on my 68 1600, so I tightened
it. Now the alternator makes a
scraping sound. Upon closer inspection, I can
now clearly see the problem. The
alternator fins are wobbling & hitting the
face of the alternator casing. The
alternator pulley is also wobbling. So,
tightening the belt just put torque on
the pulley & now it rubs on the
casing. I checked the nut on the face of the
pulley & it seems to be tight,
so maybe the alternator bearings have gone
bad. I checked the Rock Auto
parts section & they list 3 parts for the
alternator, a "Alternator
Rectifier", an "Alternator Drive End Bearing" & a
"Alternator Commutator End
Bearing", Is this an easy fix or am I destined for
a new $185 alternator? My
alternator is stamped Mitsubishi. The car was
running fine before I
attempted the belt tightening, the belt was just a bit
loose, but not
effecting the alternators performance. The battery was charging
just fine. I
had recently noticed an occasional rattle like sound coming from
the front
of the engine at times, so maybe that was the sound of the bearings
going
bad. I can loosen the belt up a bit & the scraping sound will go away,
but
the wobble remains.
One other option is I have an alternator sitting
in my 69 1600, but
it's been idle for 17 years or so, would sitting that long
ruin the old
alternator or would it work as a swap solution?
--
D.Cooke
Midwest Roadsters
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