MacBook Pro Early 2008 Severe Overheating

I have an early 2008 (non-unibody) 2.5 ghz 15" MacBook Pro with some severe overheating issues. I'm trying to eliminate what ISN'T the problem and at the point where I think it may be a malfunctioning heatsink. I'd like to get a more expert opinion though.
The first symptom was hotter than usual operating temp, which could be felt near the top of the keyboard. It became so hot that it was no longer comfortable to place the machine on your lap. The fans were operating way more often and harder than usual. Eventually, one of the fans got worn out and started making a heck of a racket. I've read a lot about this and I know it's not uncommon.
I thought it was some software that may be causing the problem, so I took a day and opened up the machine, blew out any dust, disassembled and lubricated the right (problematic fan), formatted the drive, and reinstalled OS X. I really thought this would help, but when reinstalling OS X, the machine kept overheating to the point where it would shut down. I felt relieved when I was able to get it completely installed.
Now with no other software installed and just Safari running, it sits at an operating temp of about 90C (according to SMCFan Control)! The right fan is screaming again. I can get it down to 75C by forcing the fan speed up to 6000, but that's with no program running. Heat is particularly severe at the bottom of the screen at the fan exhaust (slightly more on right).
Unfortunately, I can't run a hardware test because the SuperDrive is dead (3rd one on this machine).
Any help on diagnosis is very welcome.

From Apple support article TS1258:
MacBook Pro (Early 2008): Dark bands showing intermittently on built-in display.
If the issue persists when running Mac OS X v10.5.3 or later, a quick reset of the display panel will reset the LED backlights.  The quickest way to reset the display is to use the following key combination:
Press Control - Shift - Eject.
After the display goes to sleep, wake it by pressing any key on the keyboard.
I get this all the time on my 2008 MBP and the above usually works.

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