terminator

I'm taking my 96 4Runner with a replacement engine from a 98 with 61K back to the shop that did the work to have them look at it. I have a very noisy engine bay from what I would say are pulleys and an antifreeze smell. I don't see any fluid on the ground anywhere and the radiator and overflow levels are good.

I'd like to give them a good starting point so if you all know of any notorious engine issues I'd like to let them know. I read on a thread somewhere about a coolant line that goes into the block and maybe a plastic fitting is good for cracking but I can't seem to find that old thread anywhere. Are there any pulley problems or bearing problems I can tell them about also?

Thanks in advance
Jason