Thread: '04 GTP Overheating disaster

Honestly to me it sounds like the thermostat is working as it should now. It coolant temp rises and then once it's over the thermostats temp it opens and cools back down. Or the low speed fan is coming on and cooling it off.

If you own a handheld scanner that does live data you could just plug it in and read the coolant temp that the motor is seeing. Likely is the range of 195-205 degrees.

sounds like you still have air in the system.
on a cool engine (after a drive, let it cool 30 mins), take off the radiator cap. make sure it's full.
Start the car, let it run until the tstat opens and temperature rises. Open the bleed screw on the tstat housing until you get a good stream of coolant the close the screw.
Top off the radiator again. keep an eye on the temperature, and repeat again if needed.
Finally put the radiator cap on, make sure the overflow bottle is filled, shut off the car.

Originally Posted by 01grandpri

Put a 180 thermostat and it will stay below half


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Not with air in the system and factory fan settings. It will still rise while sitting still.







And to the OP, I will have to agree with the other guy now. It still seems that there might be air in the cooling system still.

Originally Posted by kman789

In response to fivefingerdeathpunch, I just ran it for a drive and let it idle. Lowest it was after heating up was 216 F, highest it got was 228 F.

I will try that. The shop bled it yesterday when I picked it up right in front of me for a half hour had bubbles coming up in a no spill funnel, and it still shot up the next morning, so I'm wary of that helping but I may as well give it a try.

thats pretty normal temps for a 04 up car, for some dumb reason the fan temp on settings are set to 217, and 228 ironically.....

only way to lower it is to get a tuned pcm with lower fan temp settings. the 180 t stat wont help really.

its not that bad. just let it idle rad cap off till the fans tune on, fans on you know the t stat is open, then open the bleeder. then top off the rad. check the rad level the next few mornings and fill if needed.

When I bled my cooling system, I overfilled my reservoir and just keep cracking the bleeder screw. Eventually nothing else got sucked in, and only coolant spewed out.

It's normal. You don't recall it because you weren't paying attention to it before until this happened now you are hyper vigilant about it now. What you are describing is normal. Putting in a lower thermostat isn't going to help the fan settings. It just means that the swing will be more than it is now. Believe me I tried all that. For some reason my 05'gtp has a 5/8" radiator instead of a a 1" down here where it regularly gets over 100* during the summer my car will not keep up and will actually have to use the fans to keep up when the temp is over 90. Two things I found were the covers that go over the condensor and the radiator were missing, putting them in place dropped temps about 10* and adding a stand alone trans cooler dropped the temps another 10 degrees and lowered trans temps by 30-40*. It still gets too hot but I lowered the turn on temp to 210. It's not ideal but it seems these cars have horrible ducting.

Jeff

Is there supposed to be 2 roughly 2 foot long plastic pieces that fit above the radiator and cooling fan to cover up the space in between them?
I found a plastic piece that looked broken off sitting off the the side.
So there is about a 1/2 inch to 3/4 inch gap in between radiator and cooling fan on the top.
That doesn't seem right.

Yup there are 2 of them roughly 12" each those were what I was referring too.

here is a pic of them in this thread:

http://www.grandprixforums.net/threa...=1#post1373477