QUOTE(McMark @ Mar 15 2011, 09:33 AM)
I'm not nearly as well-versed in six cylinder parts-n-pieces, but can't you unbolt the alternator and pull the fan/alternator unit out together? Seems like it would make it a lot easier to hold the fan...
Yes and No.....The bolts that hold the alternator halves together go through the fan housing as well. On numerous occasions I have tried to unbolt them only to have the long bolts spin requiring to hold the bolt heads that are under the fan.
Normally it only takes a "tap" with a brass hammer since it's not an interference fit and I have never damaged a thread doing so. They normally slide right apart. However, that is why I mentioned heat if a "tap" didn't work. A little heat (oxy-acetylene)around the hub and you can usually lift it right out without anything.
Yes, a brass hammer can do damage if you don't use it right. In fact I can drive nails with one if I hit hard enough......However, a straight "tap" at a 90 deg angle should have done the trick with no damage at all...Done it many, many times. If it requires a "blow" than heat is a good method combined with a "tap"
You can also use a piece of hardwood on top of the shaft for more protection but get lesser results.