At 03:58 PM 4/8/02 +0100, David Hill wrote:
>Playing with my '72 GT donor yesterday, I spotted that the crank pulley
>can be moved by hand, in relation to the crankshaft. The free rotation is
>about 10 degrees and when the pulley moved, the centre bolt moves with it.
>It is definitely not the outer rim that's moving - the damper appears to be OK.
>....
This could (maybe) be even worse that anything suggested yet. If the
center bolt is tight, and the pulley hub is indeed snug on the crankshaft,
and the nose of the crankshaft is turning slightly with the pulley, then it
may have a broken crankshaft. Done that once on my MGA 3-main-bearing
engine. The crank broke at an angle across the web just behind the front
main bearing. The engine continued to run, made gentle knocking noises at
idle, but made LOTS of very loud knocking noise with just slight
throttle. The rest of the story is interresting but long, culminating in
changing the crankshaft in a motel parking lot.
Barney Gaylord
1958 MGA with an attitude
http://www.ntsource.com/~barneymg
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