So I searched and didn't have any luck, never really do... maybe im just searching impaired. But anyways my 280zxt seems to run really hot sometimes, like completely past 270 but on other days it will bearly heat up past the °f? Changed out the thermostat just the other day. And didnt help any. What could be the problem here?

 

Oh and it never over heats/ has the radiator cap pop off.

 

#1: You are not running the right mix of coolant.
#2: You are not running the right thermostat.
and/or
#3: The radiator isn't cooling properly.

If #1 or #2, then fix.
To verify #3, use an infrared thermometer to check coolant temp at the thermostat housing, and again at the bottom radiator "out" hose. There should be a 25-30*F drop.

 

I was planning on flushing the whole thing tomorrow. And as for the thermostat im pretty sure its the correct one unless autozones look up thing lied to me. Lol and also would I be able to rent a infrared thermometer from somewhere?

 

Seeing as they are $20 brand new, renting one would be a waste of time and $$$.

 

well in that case looks like ill be acquiring myself a new infrared thermometer.

 

Harbor freight has them for ~$20, or if you can wait a week, you can get them for a few bones on ebay.

 

Alright thanks. And I read somewhere that if the timing is off that could also heat up the engine? Is that true?

 

Yeah, too advanced timing can cause it to run hot, but that's not likely the only problem. What is your timing set to right now?

 

Im not really sure what its set to all I know is that I checked it earlier today and couldn't see the line any where near the guage thing. Probably not to good... lol ill need to look up how to do that for tomorrow.

 

well flushed it and put new antifreeze in, we'll see how it goes.