So, as the bonne is warming up to normal running temp(right about 190) it will blow hot air from the heater, if I go and let her idle for a bit, say I run inside or just sit in the car for a bit because I don't wanna go to work yet, itll go up above 210 in temp but no more than 220 and start blowing colder air. It has never done this before and I've never seen this before either. Any thoughts as to what could be wrong? any ideas of what to check to see what could be wrong?
Note I don't have a garage on base to truely get in and dig into whats wrong, and its a snow storm in chicago right now.
Engine overheating and blowing cold air
-
rustyroger
- Posts like an LG3
- Posts: 381
- Joined: Fri Aug 05, 2011 10:53 am
- Year and Trim: 1998 Buick Park Avenue
- Location: Margate, England.
Re: Engine overheating and blowing cold air
How cold is it outside?, it's possible the heater may be slightly plugged and can't get enough hot water through to keep heating the car.
Have you checked your coolant level?. if it's a bit too low that might give you similar symptoms, in the summer your car would probably run hot.
Roger.
Have you checked your coolant level?. if it's a bit too low that might give you similar symptoms, in the summer your car would probably run hot.
Roger.
-
J Wikoff
- Administrator
- Posts: 17080
- Joined: Mon May 19, 2008 7:01 pm
- Year and Trim: 1992 SSE
2009 G8 GT - Location: Central Illinois
- Contact:
Re: Engine overheating and blowing cold air
Take the radiator cap off and check for sludge. It could be all gunked up and blocking the heater core.
WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights
-
SSEi95
- Site Owner/Webmaster
- Posts: 7005
- Joined: Sun May 18, 2008 10:53 pm
- Year and Trim: 2002 SSEi
'01 Sierra C3 - Location: Minneapolis, MN
- Contact:
Re: Engine overheating and blowing cold air
Failing thermostat maybe?
-
Sirius
- Resident Gearhead
- Posts: 2143
- Joined: Thu May 22, 2008 10:40 am
- Year and Trim: 2003 SSEi
- Location: West Point
Re: Engine overheating and blowing cold air
This. First. It's cheap & easy!rustyroger wrote:...Have you checked your coolant level?. if it's a bit too low that might give you similar symptoms...
Don't just look at the surge tank, pull the rad cap off and have a look in the radiator. Only when the engine is cold, though, please.Resident Tightwadgweg_b wrote:People think I'm nuts, but Matt proved it.
Screw you, Photobucket.
-
blackbeauty99
- SLE Member
- Posts: 55
- Joined: Thu Jan 02, 2014 8:41 pm
- Year and Trim: 1999 Bonneville SLE 3800 N/A
Re: Engine overheating and blowing cold air
I had the same thing happen to my car with it overheating..it was 97 degrees plus..in town..heat gauge spiked into the 210 range. And was not going down..stopped opened the hood let it cool off..then when the weather got colder my temp ran at 165 degrees..suspected the thermostat..replaced it and its been fine ever since..I would do a heater core flush....and a new thermostat..