Frank,
I've rebuilt mine twice...actually the local machine shop re-sleeved the
barrel. On mine, I think it was an end-play problem, especially as I
tended to over-tightened the nut or collar to the dynamo(generator). I
found all sorts of little brass shavings in the grease on mine and the
bore was eccentric.
Generator rear bush may be in poor shape or.....after a lot of head
scratching.....the cable from the tach to the drive wasn't lined up
straight to the drive gearbox and put a bit of side-load on the gearbox
shaft. ????? I re-sleeved, was careful on how tight I fastened it to
the genny, and lined up the cable and 4 years later still good. I once
had a tach gearbox back off of the genny and wow!, did that wang around
under the bonnet. A bit of garden hose and 2 hose clamps prevented that
from re-occurring.
Dave
59 :{)
59 MGA 1500
Burlington WI
Frank Clarici wrote:
> Ok, why does the tach drive unit sound like a rod knock?
> I already replaced the generator tail bushing.
> The guts of the tach gear unit are greased and there is no play on
> either gear shaft.
> Disconnect the tach gear from the genny and the noise stops so it's
> NOT the genny. Hook it up and it sounds like a rod knock.
> An alternator is looking better and better but I am hell bent on
> trying to keep the 58 original "looking" so whimpy shift knob, massive
> steering wheel, and noisy tach drive "should" stay.
> Then again disc brakes, 1275, 5 speed have nothing to do with "looks" ;)
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