My old IBM 75GXP lost a few sectors when using it when temps got above 55C.
.. perhaps open your side of case
You should get Thermaltake iCage ,,,, takes up 3 bays ,,, blue light 120mm fan 3 hard drives you can put in the cage...... gl
Google's paper showed increased failure rates at both too hot and too cold. I can't find the PDF ATM, but IIRC, there was negligible difference in failure rates until 60C+.
I doubt temperature was the main reason for its failure:My old IBM 75GXP lost a few sectors when using it when temps got above 55C.