2003 Cheverolet impala overheating......
TLL

United States

#41 Aug 2, 2012
My 2003 Chevy impala v.8 is running hot. Radiator and fans were replace 1 month ago. Started running hot, Thermastat was replaced a week ago then bled. Now its back running hot. Was a great car 188,000 miles
Biggrod78

Blountstown, FL

#42 Aug 3, 2012
So I have a 2003 Impala and this time last year I went through hell & back with this car!!! I was told that my radiator needed to be flushed. I flushed it 3 times. Then told the thermostat needed to be chaged, did that. Then found out all of that just to later find out it was the heads and that some sort of stop leak had been used, but I think this is something that was a part of the motors when they were manufactured. Apparently from all of the research I have done and all of the info I get from the mechanics I know is that this car is the crappiest car and model. It was designed poorly and have a number of things go wrong with it. I now am having the same problems again and have had another thermostat and a NEW radiator replaced and now it needs heads again. Does anyone have any suggestions on what I should do or if there is anyone that I can contact?

Thank You,
Biggrid78 34 yo female
shane8668

Allendale, MI

#43 Aug 10, 2012
i have a 03 grand am with the 3.4, have the over heating problem, misfire in cylinder 1 and had brown sludge in oil, changed intake gaskets. ran good for 20 minutes and have over heat and misfire again. no mixing of oil and coolant so far, but frustrated!!!!
cody

United States

#44 Sep 8, 2012
get one quart of blue devil head gasket sealant follow directions exactly nd bam ur problems fixed i need a new intake manifold gasket nd i have the 2000 chevy impala 3.4l i put the blue devil in nd my car has gone 5,000 miles with out overheating. i highly recommend thiz product u can get it at autozone
Rick

Albany, CA

#45 Sep 9, 2012
shane8668 wrote:
i have a 03 grand am with the 3.4, have the over heating problem, misfire in cylinder 1 and had brown sludge in oil, changed intake gaskets. ran good for 20 minutes and have over heat and misfire again. no mixing of oil and coolant so far, but frustrated!!!!
I have the same problem on my 2005 Impala with the 3.4. I also changed the intake gaskets due to steam coming from under the hood. The coolant was running out of the intake and into the exhaust manifold heat shield. The car ran well afterwards. Last week, I noticed a lot of Oil on the ground from underneath my car in the garage. I checked the oil and coolant levels, and they were fine. The engine then overheated and stored code #0300 in the PCM memory. The misfire is caused when you overheat the engine, and the computer changes the timing to reduce engine damage. Now they say I need new head gaskets and the intake gaskets done again. The dealer said the heads themselves may be cracked and may need a replacement. Upon teardown, they also say they will inspect the block for possible warpage. If the block is warped, they say I will need a new engine. If I need a new engine, I am going to call the junk yard and have them come take the car. I am through with GM products such as the Impala. If the car can be repaired, I am going to get rid of it after it is fixed.
Rick

Albany, CA

#46 Sep 27, 2012
I took my 2005 Impala out of the dealers shop because the cost to repair was high. A friend of mine and I took the top end apart in his shop, and found a blown head gasket caused by the water pump that went out. The water pump was not pumping the coolant through the engine, and into the radiator fast enough to be cooled. The water pump caused the engine to overheat. The block was fine on inspection, and the heads were taken to a machine shop. There were some burned exhaust valves on the heads as well that needed replacing. The heads were not damaged and were pressure tested. We put new gaskets on the entire top end of the engine including the intake. All of the fluids were then flushed. Now the car runs good and does not overheat. The oil leaking onto the garage floor was due to the blown head gasket leaking externally. The entire job only cost a fourth of what the dealer was going to charge.

Now I am going to look at a new Ford.
Kei

Saint Albans, WV

#48 Oct 8, 2012
My 2000 impala just started running hot, no visible leaks but smoking badly. Coolant tank is full but heat stooped working also.....anybody can suggest whAts wrong?
Leo

Philadelphia, PA

#49 Dec 10, 2012
I had the same issue. Check the catalytic converter. Once clogged you'll get the symptoms that you've described.
kurt wrote:
friend from work has a 2001 3.8, plastic part of the radiator on the drivers side that leads up to the hose that goes to the therm. is cracked. Been sealed as a temporary fix with jb weld. worked o.k. but cracked further. He has been keeping the coolant topped off with the correct type. This has ben going on for a few days until he can get it in to get fixed. Now here is my question. He was on the way home from his cousin's house and it started to over heat, so he oulled over to let it cool down for about a half hour.Checked coolent and added some as needed. Tried to continue home and the car doesn't want to go anywhere.hits the gas and egine revs,Engine is running fine, fan comes on,fluids are good, no dripping water out of the exaust. will go into gear and move slightly.
All from over heating ? Im not a GM guy, but any ideas?
Jcin101

Middle Island, NY

#50 Dec 10, 2012
I have a 2003 impala myself have had water pump thermostat coolant flushed new radiator and fans installed , and my car continues to overheat ! Please help
Rick

Albany, CA

#51 Dec 10, 2012
Just after fixing my 2005 Impala for overheating caused by a faulty waterpump, and blown head gasket, my 2003 Impala started overheating. The problem with the 2003 Impala turned out to be the plenum gasket on the intake. I was having to add a cup of coolant every week, and couldn't find out where it was going. Since the plenum gasket was fixed, the coolant level has not gone down at all. Also when the plenum gasket was leaking, you could hear air rushing through the cooling system when you turned the engine off. My 2005 Impala has the 3.4 engine, and the 2003 has the 3.8. The 3.8 has the plenum gasket, and the 2005 does not.
Randall

Brea, CA

#52 Jan 27, 2013
CAR wrote:
2000 chevy impala overheating, can see and hear bubbles blowing into coolant tank/overflow. oil still brown in color, engine runs okay at idle. but will quickly overheat if driven.
. Remove spark plugs 1 @ a time - see if any one , or two side by side are wet ! If any are wet blown head gasket ! If all plugs are dry great , just replace thermostat !!
I had same problem, I removed thermostat (and left out )out of engine , thermostat is bad !. Left out only due to warm weather was above 65 degrees F. And summer was comming . I Had Bowen head gasket. When u do replace thermostat go down to 190 or 192 degrees F. NEVER use 197,198,199, or 200 degrees thermostat because of all the aluminum parts !!!!!
Randall

Brea, CA

#53 Jan 27, 2013
Jcin101 wrote:
I have a 2003 impala myself have had water pump thermostat coolant flushed new radiator and fans installed , and my car continues to overheat ! Please help
. Remove spark plugs one by one. See if any 1 or 2 side by side are wet ! If wet so that side(s) head gasket leaking ! replace thermostat with new one that ( LOCKS OPEN )when over heats get new temp @ 190 or 192 never higher !!! [email protected] Good luck !
Randall

Brea, CA

#54 Jan 27, 2013
TLL wrote:
My 2003 Chevy impala v.8 is running hot. Radiator and fans were replace 1 month ago. Started running hot, Thermastat was replaced a week ago then bled. Now its back running hot. Was a great car 188,000 miles
. Check fuses and breakers , does the coolant fan by radiator come on when a/c switch turned on , or if inside fan switch placed in upper defroster position, get cooler thermostat 190 or 192 max, that locks open if overheated. Use straight antifreeze never add any water ! [email protected]
Randall

Brea, CA

#55 Jan 27, 2013
Jcin101 wrote:
I have a 2003 impala myself have had water pump thermostat coolant flushed new radiator and fans installed , and my car continues to overheat ! Please help
. Change ALL of the transmission fluids and new filter and new transmission gasket ...! U may have boiled transmission fluid due to the factory transmission coolant tank is part of the radiator!! Add a separate transmission cooler unit in front of radiator (not hooked into any part of radiator any where).. [email protected]
Randall

Brea, CA

#56 Jan 27, 2013
Kei wrote:
My 2000 impala just started running hot, no visible leaks but smoking badly. Coolant tank is full but heat stooped working also.....anybody can suggest whAts wrong?
. IS Smoking badly ? From under hood or out tail pipe ? If smoking (white) out of tail pipe u have blown head gasket , remove spark plugs one @ a time, if any 1 or 2 side by side are wet , u have found area(s) of bad head gasket ... Ok if smoking under hood when engine was hot look for leakage of antifreeze, are ALL hoses ok ? The belt(s) ok ? if the engine uses only 1 belt ! Remove belt , now is the water pump and pulley ok ? Remove thermostat replace with thermostat that (locks fully open ). Temperature 190 or 192 NEVER higher!! [email protected]
Dan

Harvard, IL

#57 Feb 1, 2013
My 2003 Impala 3.8 under heats. Temp runs at 140/145 deg. in winter and 160/165 deg summer. What do you think is reason?
Jesse816

United States

#58 Feb 15, 2013
why still blowing cold air? theres no air in the system,thermostat good,fluids good and circulating,water pump working,temp gauge reading normal but engine seems hotter than normal
jay

Ripon, CA

#59 Feb 18, 2013
I h#d the same problem and still havnt heard from gm I want my car recalled fxed.
marshall

Hermitage, TN

#60 Mar 11, 2013
Bad 2003 impala wrote:
My 2003 impala is over heating.I get heat for a few min.then no heat again.Car will run fine but after a few min.it will start to heat up sometimes it will give heat others it will blow cold.Replaced the thermostat,waterpump,flushed out radiator and heater core still temp riases to 2e help
same problem
Rick

El Cerrito, CA

#61 Mar 12, 2013
Dan wrote:
My 2003 Impala 3.8 under heats. Temp runs at 140/145 deg. in winter and 160/165 deg summer. What do you think is reason?
My 2003 Impala 3.8 did the same thing. I changed the thermostat, and that solved the problem.

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