I'd suggest that (assuming you are using the proper spigot bush) perhaps
your crankshaft pilot hole (where the bush is inserted) is oversized, or
off-center. I don't know the specifics of your motor, but if your crank
came from a car originaly equipped with an automatic transmission, it
probably didn't have the pilot hole drilled at the factory. It's
possible that the shop that modified the crank for a manual tranny may
have reamed/drilled/honed the hole just a little to big. Or even if it
did come drilled from the factory, it's possible that it was at the bad
end of factory tollerances. Either way, I'd pull the bush, and mic' it
and the hole. There should be at least a few thou' of interferance to
get a good press fit. If not, the bush WILL spin.
James J.
p.s. if there isn't enough interferance, any good machine shop should be
able to make you an oilite bushing just a few 'thou larger than the hole
I.D. That way you won't have to trash the crank.
Bruce Wright wrote:
>I have a Rover V8 in a Triumph TR7-TR8 conversion. A few years ago I had the
>motor rebuilt and stroked to 4.2 litre (from 3.5).
>In about 18 months, the spiggot bush began to spin in the motor. Everyone I
>asked then suggested that this happened rarely, but when it did it indicated
>the spiggot had not been soaked in oil for long enough before being
>installed.
>A different installer, careful fitting, longer soaking in oil, same result.
>I've now down just over 100,000 km since the original engine rebuild, and the
>fourth spiggot bush has begun to spin.
>Has anyone else had similar problems? Any ideas what could be causing it?
>I'd appreciate any suggestions.
>bruce
///
/// buick-rover-v8@autox.team.net mailing list
///
|