In a message dated 1/12/01 6:09:57 PM Eastern Standard Time,
herald1200@home.com writes:
<<
The crankshaft nut shouldn't be the one holding the fan on! That is usually
a 1/4" bolt, that won't turn the engine! Don't break that bolt off- you'll
have to pull the water pump to remove it!
The Crankshaft nut is usually 3/4" or better-
I fear I'm coming off as dumber than I really am. The bolt I'm referring to
is a 13/16 bolt and is clearly in the center of the crankshaft. It sits,
however, recessed in the center of the fan and appears to be holding on a 2"
round plate that is in front of another 2 1/2" plate which appears to be
securing the fan. Perhaps this is how the yellow 250 fans went on. Perhaps
this is some makeshift manner of holding a fan on. I don't know. I just went
counterclockwise and it easily untightens that way. But I'd rather not remove
the fan for balancing concerns -- if any and I don't see why that would be
necessary -- or even useful.
it is in the center of the crankshaft pulley,(The lowest pulley, attached to
the front of
the crankshaft) and once you put a big socket on it, and a breaker bar, you
should be able to turn the crank. And go clockwise to see if it is free. You
should see the valve train move within the first 1/4 turn.
And it didn't. It was the 13/16 bolt that was turning and there was no
corresponding movement of the valves. Which means -- if something turns and
something that's supposed to be attached to it doesn't -- then either
something's wrong or I'm turning the wrong thing. Hence my question asked
perhaps in an excess of caution.
I suggest you refer to a mechanic manual or shop manual for your car, and
look at
the diagram of the crankshaft.
I really do know what a crankshaft is and where it is and what it does and
what it is attached to. As I said above, it just wasn't making sense that the
nut would turn and the valves wouldn't and I so asked what surely seems
obvious to the knowledgeable in an excess of caution.
Thanks.
Jim
Jim
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