|02-22-2013, 08:33 PM||#1 (permalink)|
Join Date: Feb 2013
Thanked 0 Times in 0 Posts
05 Impala Overheating
Hi, new to the forum, but hoping someone can help me figure out what's going on, so I don't have to deal with any local mechanics.
To start off, I recently picked up an 05 Impala, with the 3.4L Engine.The guy I got it from told me he was driving along with his heater on when all of a sudden the heater went cold and the overheat warning came up. He took it to his shade tree mechanic, and was told it had a busted head gasket. Not really caring for repairs, and being well off, he went out and got himself a new car, with the mechanic offering to take the old one off his hands for $100. Obviously the guy was trying to scam him, but the guy is a family friend and offered to let me have it.
Now... The car starts up and purrs like a kitten, no misfires, strong compression, and all of the fluids are clean and clear. The radiator is clear as well, save for what i'm assuming is DexCool gunk in the filler cap, as the cooling system doesnt seem to have ever been flushed. Im not sure if the Mechanic did it or what, but the low end bleeder valve was open and spraying coolant out onto the motor, and the high end seemed to be leaking a bit. I tightened the low end up, put some water in it, and got a few miles down the road when it overheated. I unscrewed the low end bleeder valve some, it shot air out, and I made it the remaining 6 miles home with the gauge bouncing between 1/4 and 3/4 marks on the temp gauge.
There's a few things I've considered...
The previous owner dumped regular coolant in with the aging DexCool, and it's gummed the cooling system up, which has in turn gummed the Thermostat up as well, but not enough to completely screw it up. Or the cooling system needs the air purged.
Personally I think a system cleaning, and a new thermostat would clear the problem up, but i'm the last person i'd refer to as an Expert when it comes to Impalas. If anyone has any ideas or suggestions, i'd be grateful for them.
|02-22-2013, 11:28 PM||#2 (permalink)|
Join Date: Apr 2012
Thanked 653 Times in 539 Posts
^^ Your statements are correct. What I would do
1. Get a coolant flush at a quick lube
2. Go home and drain coolant
3. Replace thermostat, gasket, and coolant temp sensor (under $40)
4. Refill with prestone (dexcool is just inconvenient and I refuse to use it anymore)
5. Let warm up with rad cap off and squeeze hoses or use bleeder valve
6. Removing and cleaning the overflow tank/hose is not a bad idea either
Note: It is kinda hard to distinguish whether the gunk is indeed from mixing coolants or due to a headgasket or lim gasket leaking. Both are possible. As long as your oil level is staying, you don't smell a sweetness from the exhaust, it is likely the gunked up cooling system. The gunk in the system will likely cause inconsistant readings from your coolant temp sensor. Thus, I recommend replacing that as well or at a minimum clean it up.
2001 Impala LS
TransGO Shift kit
Spectre Cone Filter
Thunderbolt Spun Cat
ZZP Alternator Power Cable
Wagner Thermoquiet Pads
KYB Strut Plus (Rr)
L67 Pass Eng Mount
Tinted tail lights
Dipped Rims and emblems
Led plate, full interior, trunk, and console
Black interior accents (handles and switch panels)
Jbl gto 6.5" and 6x9" with trunk amp bypass
Sony MEX-GS600BT stereo
"Apply Dielectric Grease or I kick some arse"
|02-25-2013, 11:08 AM||#3 (permalink)|
8th Gen Antagonist
Join Date: Mar 2009
Location: Vancouver , WA
Thanked 1,192 Times in 788 Posts
Sounds like air was probably the issue all along, aside from the bleeders you found loose, are there any other leaks?
1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's
|02-25-2013, 04:57 PM||#4 (permalink)|
Join Date: Nov 2012
Thanked 15 Times in 13 Posts
I agree with g25. He listed the steps to bleeding the system and it is good to keep up with this every so often.
No heat is most likely coolant not getting to the heating core. If you ever think you have a bad head gasket, you can do some searches for symptoms, but in general, you have mixing of oil in the coolant and coolant in the oil as well has that smell g25 listen since the car is burning the coolant now. There is a chemical test that can be done to see also.
Flush the system and ensure that you have all of the air out. Monitor the fluids and let us know.
2005 Chevrolet Impala 3400
2002 Pontiac Grand Prix GT
2000 Pontiac Bonneville SSEi
2000 Pontiac Grand Am GT
1980 GMC Sierra 454
|Thread||Thread Starter||Forum||Replies||Last Post|
|Overheating||hotwil||Chevy Impala 6th Gen Discussion||3||07-29-2011 01:43 PM|
|95 LT1 overheating...........||suicide doors||Mechanical and Electrical Problems||8||05-27-2011 07:22 PM|
|63 Overheating||Tat2Izzy79||1st - 5th Gen Engine Performance||16||10-05-2010 10:05 AM|
|Overheating???||southbay2||Chevy Caprice||2||12-29-2009 07:41 PM|
|06 3.5 Lt Overheating||Capone2x||Chevy Impala 8th Gen Discussion||1||08-31-2009 10:54 AM|