i dont know if you are having the same problem or not but i just drove 150 miles today on the highway and i got to a gas station opened the hood and felt the upper radiator hose, it was hot so i went to touch the lower it was cool. the heat works great almost burnt my eyeballs out last night. its still only at 150 degrees, i replaced the thermostat when i got it in may. any ideas? bad thermostat? should i do a radiator flush?

 

the water in the top is prob coming out of the motor which will be hot the bottom is going in the engine it has been cooled by the radiator

 

never blocked part of the grill

 

So do you think there is a problem?

 

no i just think its real cold wher your at start it and block th grill with some thing and see if it gits above the temp that worries you might be your thermostat is stuck open not allowing the water to stay in the motor long enough to get up

 

It did this in 90 deg weather. That's why I replaced the tstat. But nothing changed

 

mine runs 175 180 all day long so i got no other ideas

 

Does your heater work? Can u borrow a scan tool to verify coolant temp? U could be getting a false reading from the temp gauge.

 

This.

Mine will get up to 200* in the dead of winter in under 5mins. Sounds like your dash guage is .

 

is your thermalclutch on you mechanical fan locked up because it should only engage at operating temps
is your radiator bigger than stock?

 

ill trade you for half of my under cooling problems

use a highter thermostat.

 

I kinda got the same thing goin on too except mine is only when i have heater on. with it off it about 190 and when the heats on it about 170. I noticed my mpg kinda got worse since its been colder out here (ny).

 

Your getting too much coolant flow. Check the t-stat, if its stuck open (rare unless you have a fail safe t-stat) replace.

To check that its not opening too soon. Remove t-stat. Put some water in a pot and place on the stove. Use a thermometer to verify the water temp. Put the t-stat into the pot of water and then turn the oven on. At 195* the t-stat should open.

 

humm..I had a "fail" safe and it stuck open...and replaced that with a superstat. And before all that a cheap one from auto zone. so I go thought a lot of thermostats. Any other "better" brands out there?

 

I really like Stant, never had any problems with them. Napa carries them or you can use their website to locate a local dealer.

http://www.stant.com/distributors.cfm