I drove my 89 Montero to work for the 1st time Friday & I noticed the temp got above normal while in traffic but then would go back down when moving. Yesterday I drove it all day then on the way home I took a backroad & it started going above normal again then the engine started pinging & died on a hill. I let it cool for about 45 minutes, added water & drove about 2 miles before it started pinging again so I pulled over again. This time when I added water it poured out the bottom of the radiator so I got a tow home. I obviously need a new radiator & from what I read (while waiting for it to cool) it seems like I probably need a new fan clutch, so where would you guys suggest getting the new hardware? Also, should I have any tests ran since this Monty is new to me & the PO had the radiator replaced less than 3yrs ago?

Thanks in advance!