I just had my 92 apart, and there was no teflon, just a thick thick layer of the blackest meanest carbon crap. It took forever to clean it off. I used everything in the book to get it off. But the carbon probably doesn't hurt anything. It'* just going to come back.
My throttle body was the same way. So much carbon the plate would stick, I could hardly get it open by hand, and it would open with a resounding "snap"! Once cleaned, it is perfect.
BTW I purchased some of the rheo temp 500 for the end bearings, I'd like to recoup some of that expense, anyone need a tiny bit????
1992 green ssei. Tan leather, moonroof, power everything. 161k miles
Goodyear RSA Plus 225/60/16 VR on chromed factory crosslace rims. McGard chrome lugs.
Audio system: CD player w/equalizer, subwoofer (all stock).
Delco premium wires, NGK TR55 plugs, K&N stock style air filter. Ceramic brake pads. New rear brake tubing and proportioning valves. New wheel cylinders, front rotors and calipers. New front wheel bearings. Replaced crank sensor and harmonic balancer. Rebuilt instrument cluster. Cleaned A/C evaporator. Valve cover gaskets. Alternator. Front stabilizer links. Replaced all power steering lines and transmission lines. Cleaned MAF and IAC. New door appliques. Rebuilt steering gear. CERAMIC brake pads, I love them. I am listing all this in case someone needs advice on any of these repairs.