i had similar problem in my 97 sentra.
after i had everything checked, the overheating was still there.
finally, an old-timer advised me, to replace the aux fan. i said, "malakas naman ang hangin." the guy said, check it against a new fan motor".
i did, and the difference was night and day.
ever since i replaced the aux fans, the temp has been behaving.
moral of the story: "looks ok does not always mean, it is ok".
Last edited by dr. d; October 24th, 2018 at 10:41 AM.