[dandrews64]

So with the summer heat coming I need to solve this problem that I've ignored during the winter.

My '82 SC with 139K miles runs hot. Engine is bone stock.

After about 30-60 minutes of 80mph cruising in 80+ degree heat, the temp guage registers between the upper white hash mark and the red zone (10:30, if the guage were a clock). Let me know if I need to post a pic of the guage.

On even hotter days and longer drives it reaches the bottom of the red zone (11 o'clock). This has to be bad. During the cold weather, it has run in the normal temp zone (9 o'clock)

Data:
- The oil lines and trombone cooler are really hot to the touch.
- Only one small dent in the line, and in my non-expert opinion can't be having a material impact - or can it? You tell me. Can post pic if needed.
- Have installed the oil cooler scoop in the marker light
- I run 20/50 non-synthetic Castrol and yes, the level is up.
- The fan belt is tight. Is there a tension/free-play test to check it?
- When I did the plug wires I was lazy and did not use the rubber wire routers that plug into the shroud. So there are 3 or 4 small holes in the shroud where the routers should be. Would this have a material impact?
- The part number on the fan/shroud is 930.XXX.XXX. Does this mean a PO upgraded to a turbo fan?


Should I bite the bullet and try the oil thermostat ? (yuk, PITA)

I've heard an old/bad catalytic converter can make it run hot. Would that be bullet #2 to bite? Car seems to have good power, so it doesn't drive like the exhaust is clogged, but I also wouldn't know what it *should* feel like. It's my first 911.

Other ideas, from this crowd of experts?