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Pontiac Aztek Overheating Problem

30 messages,  Last post on Nov 16, 2009 at 3:54 PM

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#21 of 30 Re: [mitch37] by gary_success Sep 10, 2009 (8:24 am)
Replying to: mitch37 (Aug 09, 2009 4:25 am) Well now after many,many bleeds 3 thermostat changes (running without one now). The car overheats after 15 minutes of running on local streets. The overflow tank fill up when overheated and alarms are sounding, and bubbles continue to enter the tank from the over flow hose. The hose is all the way into the tank to the bottom so that it does not suck air as coolant is needed. 1. filled system 2. opened drivers side bleed valve first and applied air pressure to radiator until a steady stream flowed from valve and closed while still flowing not to suck up air. And did the other valve the same way. 3. topped of radiator again and ran engine, right away the radiator would start burping out the fill hole. It does not seem to be flowing around, just burping. Filled and closed cap. 4. drove 15 minutes with heat on, which was hot at start then went cold when overheating started. 3/4 gage to alarm overheat in less then 1 minute after cold air started flowing from heater. 5. turned air conditioner on to make sure fans would be on high, but it did not help. 6. shifted to d3 with rpms over 2000 and no change. The next thing that I will change is the water pump I guess, only $20 Then LIM lower intake manifold gasket, around $50 I think. This could be a lot of work, maybe more then the thermostat was. I won't go into that after three times, the second time I made a mistake and after 4 hours of work realized that I had put the old one back in again, old one meaning the second one which I modified by drilling a small hole in it so it could help release air. So pulled that one out and removed the guts of the stat and installed it with only the stat ring and seal to see if running without a stat would help. That was of no help. Can someone give me a little good advice, other driving it into a lake. My email address is garygruichsbcglobal.net
#22 of 30 Overheating by corrie2 Nov 15, 2009 (2:53 pm)
We bought a 2001 Aztez and the engine fans are not comming on and as a result the engine almost overheats. We have replaced the fuses and the mini relays and still nothing is fixed. We do not know where the thermostat is (that is our next guess) and would really like some help. Replies to this message: gary_success (Nov 15, 2009 3:35 pm) corrie2 (Nov 15, 2009 3:45 pm) tidester (Nov 15, 2009 4:25 pm) and 1 more... ray80 (Nov 16, 2009 7:25 am) Rebasunshine (Nov 16, 2009 8:10 am) ray80 (Nov 16, 2009 8:18 am)
#23 of 30 Re: Overheating [corrie2] by gary_success Nov 15, 2009 (3:35 pm)
Replying to: corrie2 (Nov 15, 2009 2:53 pm) There is a sensor near the=A0thermostat, you might want to replace that bef= ore trying to change the thermostat. Also you may want to recheck to make s= ure the fuses are in the correct slots. One for low fan and one for High fa= n, it is real easy to have them in the wrong locations. Thermostat is under= the air mixer, or what ever it is called. And it is a real pain to get to.= 1 remove everything that is in the way 2 make any special tools which will= help 3 say your prayers. I changed mine 3 times, the second time I=A0reali= zed that I had put the old one back in instead of the new one so had to sta= rt all over again. The first time I changed it it tool 6 1/2 hours, second = time 4 hours and the last time 3 hours. There is a small trick for getting = the rear bolt back in. Cut a 3/4 x 10 inch chunk out of a plastic bottle an= d drill a hole at one end and slide it over the bolt to hold it in place wh= ich you make small=A0partial=A0turns with a open end wrench. A socket will fit on the front bolt because there is room, and use a long extension= to reach you ratchet at the wheel well. The extension will pass through ev= erything. You will also need to remove the nut for the pass over line which= is on the air intake thing. Good Luck, it can be done. Nothing worked for = my car and dexhell finally killed it. My mistake by mixing the green stuff,= then tap water, then having it flushed with new dexhell added, still overh= eated and then added bottle water again and then tap water. My first mistak= e which may have caused the whole problem was when I added the green coolan= t. I miss my Tek Replies to this message: corrie2 (Nov 15, 2009 3:45 pm) tidester (Nov 15, 2009 4:25 pm) gary_success (Nov 15, 2009 4:39 pm)
#24 of 30 Re: Overheating [gary_success] by corrie2 Nov 15, 2009 (3:45 pm)
Replying to: gary_success (Nov 15, 2009 3:35 pm) What is A0thermostat? Replies to this message: tidester (Nov 15, 2009 4:25 pm) gary_success (Nov 15, 2009 4:39 pm)
#25 of 30 Re: Overheating [corrie2] by tidester HOST Nov 15, 2009 (4:25 pm)
Replying to: corrie2 (Nov 15, 2009 3:45 pm) The "A0" is not supposed to be there. It's an artifact of the word processor he's using. He's just referring to the thermostat.   tidester, host SUVs and Smart Shopper Replies to this message: gary_success (Nov 15, 2009 4:39 pm)
#26 of 30 Re: Overheating [tidester] by gary_success Nov 15, 2009 (4:39 pm)
Replying to: tidester (Nov 15, 2009 4:25 pm) Ignore the AO and the = signs, something strange happened when I used cut and paste and that stuff just appeared. Sorry that I did not catch it before sending it. When I received an email with your question in my regular email box I thought that I could just reply through the email, but it was returned so I copied and pasted it to this site instead and did not notice what had happened to the text. I think you can figure out what it says though, good luck.
#27 of 30 Re: Overheating [corrie2] by ray80 Nov 16, 2009 (7:25 am)
Replying to: corrie2 (Nov 15, 2009 2:53 pm) If it only does this while sitting in stopped/very slow moving traffic while idleing, it may very well be normal (getting close to red line). It has to be very very close to red before fans turn on and is operating as designed (even though its scary to see) Replies to this message: Rebasunshine (Nov 16, 2009 8:10 am) ray80 (Nov 16, 2009 8:18 am)
#28 of 30 Re: Overheating [ray80] by Rebasunshine Nov 16, 2009 (8:10 am)
Replying to: ray80 (Nov 16, 2009 7:25 am) I was told the same thing "the fans dont kick on until a high temp" like I said we changed EVERYTHING thermostat included. Ended up being a head gasket... seems to be a common problem with all > Replies to this message: ray80 (Nov 16, 2009 8:18 am)
#29 of 30 Re: Overheating [Rebasunshine] by ray80 Nov 16, 2009 (8:18 am)
Replying to: Rebasunshine (Nov 16, 2009 8:10 am) There is a fine line between almost overheating and overheating. I'm fairly certain there has been a number of times people have had the intake manifold gaskets leak, didn't realize it, and had subsequent coolant loss that created overheating and head gasket failures.
#30 of 30 I need help!! by cpotter1004 Nov 16, 2009 (3:54 pm)
I have read everyones postings. I see that this is a common problem with the Aztek. I have done one flush and a thermostat change. The car is still "overheating" the car shop wants to charge me $50 to do a pressure test to tell me what is wrong. I am tired of putting money into this vehicle. I need some advice on what to do (besides blowing it up)! Any advice Cpotter1004yahoo.com

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