i have a d16z6. i recently swapped it in, in favor of another z6 i had. since the swap, i noticed the temp gauge was creeping up. so i started with the basic stuff,
fan is on a switch
thermostat was bad, so right now it does NOT have a thermostat
radiator is cleared, hoses, etc.
my temp gauge sits right at this level
C........m.l.l......H
if it does not have a t-stat, it shud be cooler than that.
for now it still has water instead of antifreeze for testing purposes(water is free, and less messy)
wat else cud be wrong that wud cause my temperature gauge to sit so high>?

 

a water pump thats on its way out the door could do that, not curculating the fluid enough

 

no thermostat!!

 

-Why is the fan on a switch??? If the fan is not cycling as designed, your thermo switch is probably bad. You need to look up the specs on it and do a resistance test.
-Check the front of the radiator for debris build up. If the airflow is blocked, it won't cool.
-Pull the rad cap and look at the inside of the radiator cores for build-up. If the cores are blocked, it won't cool.

 

i did that. replaced the coolant temp switch, but still the fan does not come on w/o the switch.\\

batallic: r u sayin that because i have no t-stat im running hotter?

 

with no thermo the car should run cooler...does the level go down below the middle if you turn the heat on??

 

nah. i removed the heater core because it was leaking from the copper connectors(bent), so as for no i have no heater either. but even prior to rem oving it, it still ran at the same level.