Hey All,
I decided the replace the belt and tensioner assembly on my 91' 300SL-24, I took off all the required components (fan blade, PS pump pulley..) but than I got to the 3 water pump pulley bolts. It took me 45 minutes to take them off, they were completely seized! - I was able to safely remove them BUT I was happy too soon. My water pump pulley is completely seized and rusted to the hub! I try a slight tap with a malt - nothing.. I Kroil (ed) it over 3 days - nothing.. I got back to it today and now I hear this noise (video) and I noticed a slight movement in the shaft (I actually thought the rust is giving up..) I was not planning to replace the water pump because apparently its a nightmare (is that even correct?) but I think thats the only way the pulley is going to come off.. I'm modifying a 3 jaw puller as my last idea to remove it with no real hammering..
So should I replace the pump if I'm already there? How a PITA of a job it really is?

Video:

https://youtu.be/iYeKX78Fr0A

Photos :





Thanks