Car running hot.
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 108
From: Ocala, Fl. State of Confusion
Originally Posted by sxe60
Hey Guys, remember these cars have all aluminum engines. Aluminum has a higher coeffecient of heat transfer and expansion than cast iron. We are all to quick to remember the old days when at 220-230F you were steaming. Plus, your running almost 7 qts. of synthetic oil which also works as a cooling agent. Maybe GM should leave the numbers off the Temp guage.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Originally Posted by fmpros
Well, I don't hear my fans running all the time. At highways speeds whether I'm pushing it or not it runs right at 189. Sitting in traffic on a hot day it will run to 212 momentarily but come right back down as soon as I get moving. The radiator was switched out because of a stripped drain plug (or so I was told). They still found high temps with the new radiator and switched out the thermostat. That brought the temp down. The external temp sensor in the radiator shroud was malfunctioning so it was replaced; also to no effect. They then found a bad board in the AC control module and replaced that. 1000 bucks on warranty gave me some new parts and fixed a few problems; the heat problem probably could have been fixed with just the thermostat. 
Burning Brakes
Joined: Feb 2004
Posts: 1,024
Likes: 108
From: Ocala, Fl. State of Confusion
Originally Posted by Evil-Twin
a 160 stat doesnt not make your car run any cooler than a 190 stat... the stat is there so it won't go below those temperatures ... it will maintain either 190 F or 160 F when it is freezing outside... if its 95 degrees out and the road temp is 160 F on black top... both stats will open at either 160 or 190... they will not cool the coolant ... that is done by air circulating through the cooli9ng fins... if the ground temp is 160F and your not moving the temperature will go up the 160 stat will stay open cause thats all it does.. so will a 190 stat.. if you have little heat transfer the engin develops heat quickly.. thats why these cars see 220 in stop and go traffic.. they see 235 also... its designed in , thats why there is a PCM command at 235 F...running a cooler stat onlt allows you to lower the fan on temps which helps to circulate the air..
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Originally Posted by TomT
The statement that a 160 doesn't run cooler than a 195 is WRONG. Check your digital readout. Mine never goes above 205. Usually 175-195. Like I said, if you think than running at over 220 is just great, knock yourself out. Have a nice HOT day.
one the engine collant reaches 160 the stat opens... if you disconnect the water pump the collant will go through the roof... and the stat will do nothing the only reason the 160 sta is better than the 190 is you can lower the on speeds and help get a jump on the already poor cooling system.. many people with 160 stats and lower fan setting still see 200 + coolant.. in Arizona and other hot places... you just cant transfer heat that quickly when your in traffic crawling along.. that why the pcm has the above setting for on and off.. they are also their for pollution purposes..... I never said running at 220 + was good.. I just said thats what these cars do.. so stop putting words in my mouth and get your foot out of your mouth... stick to something you know about , it obviously is not engine heat transfer, and leave automotive engineering to people that know soemthing about it... BTW I have a 160 stat in my car... aleast for the summer...
