What are you using to measure temp?
Are you running underdrive pulleys? Is it possible that your gauge is reading incorrectly?
Slightly different issue, but mine ran hot for years. I do have underdrive pulleys although I would probably swap them out for stock if my stock pulleys weren't rusted and useless. At idle the temp would continue to rise and if the AC was on, it would rise even faster. As I drove the temp would slowly decrease to normal, then heat back up immediately when I came to a stop (engine running). I tried a lower temp thermostat, high-flow water pump, installed a large two-row Summit aluminum radiator, new blue hoses, and tried different water/coolant mixtures, all to no avail. I ended up removing the stock fan/shroud and installed the Flex-A-Lite Black Magic fan with controller. Not cheap, but the car has never had issues since. I live in south Mississippi and can let the car idle with the AC on full blast in August and it never gets above where I set the temperature controller at. Driving, idling, full throttle, etc., no issues whatsoever.
I don't know if this will help in your situation but wanted to pass this along in case it does. It has made a huge difference for me.
I'm just watching the dash gauge for the temperature
Those are known to be quite inaccurate. Not saying it is..but if it's off 10 degrees, then your temps are actually ok.
Do you have an aftermarket temp guage handy? Or even a cheapo parts store gauge?
Really? Okay dang. No, I don't have any other temp gauges, but they sound easy to get ahold of. I'll swing by the parts store and see if I can't get one to check the actual temperature.
The sender for the dash guage is the small sensor on the very front of the driver's side of the lower intake.
Make sure it's clean and there's a tight connection here. If you get an aftermarket guage, install it here. You can just pull the wire off and let it hang. Dash guage will read nothing, but you are using the other guage anyway
Aahhh, it's the simple things in life that trip us up.
So, all's well now?
Sit your helper down on his roll around mechanic's seat and say
YOUR FIRED!
In your helpers defence, it's an easy thing to do.
You could be ok with a 160 stat but these cars are designed to run 190-200 degrees.
The 160 thermostat theory was good back in the 60's not anymore.
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